The document discusses techniques for improving web performance, including reducing time to first byte, using content delivery networks and HTTP compression, caching resources, keeping connections alive and reducing request sizes. It also covers optimizing images, loading JavaScript asynchronously to avoid blocking, and prefetching content. The overall goal is to reduce page load times and improve user experience.
You have done all the caching tricks in the book on the server side: memcache, apc, database cache and so on and squeezed every millisecond out of it, now your site is as fast as it will ever get. Well guess again !
Too often people forget that what you are effectively caching and creating with those technologies is the HTML part of the user response time, now if they are done correctly then HTML is 10 - 20% of your users response time, so there is room for a whole lot of improvements on those other 80 - 90%.
You will be taken through a couple of important steps to achieve this, such as how to optimize your JavaScript, CSS, Images, Cookies and a whole sleeve of other things that make frontend caching the magical place that it is.
After having attended this talk you will not only have learned to make your sites faster for your long term users but also people coming for the first time as well as people on slower connections.
Speed Up WordPress Websites - Part 1 - WordPress Cairo Meetup
Speeding up a WordPress site involves optimizing images, using a content delivery network (CDN) to improve load times, selecting fast hosting, and implementing caching. Page speed is important for user experience and retention - users leave sites that take over 4 seconds to load. Optimizing images reduces file sizes while maintaining quality. A CDN stores content on globally distributed servers to deliver pages faster. Caching saves page content for quick retrieval to improve load times.
The document discusses optimizing WordPress performance. It recommends minimizing frontend assets like images, implementing caching for assets and application chunks, optimizing themes and plugins, and choosing efficient server setups. Specific plugins like W3 Total Cache and a CDN can improve performance by up to 10 times by caching static content. Nginx is presented as a faster alternative to Apache. Overall, the key takeaways are to simplify code, minimize requests, optimize caching, and reduce payload sizes to improve perceived and actual performance.
Zingme practice for building scalable website with PHP
This document discusses best practices for building scalable PHP websites, as demonstrated by ZingMe's architecture. It describes how ZingMe uses a scale-out approach with load balancing, centralized session storage, and an automated code deployment system. The key aspects covered are load balancing with HAProxy, overriding PHP's session handling to use Memcached, and configuring servers identically through version control and scripts. The goal is to gracefully handle increasing traffic by adding commodity servers within 5 minutes while maintaining a consistent environment.
This document discusses optimizing PHP and web server performance. It covers using opcode caches like APC to improve PHP performance. It also discusses web performance best practices recommended by Google and Yahoo, including using CDNs, browser caching, minimizing assets, and profiling tools. The document is presented by the CTO of a mobile ad network company that sees high traffic volumes on only two servers.
The document discusses how to build a system that can handle high access requests. It covers optimizing performance at the node level and scaling to multiple nodes. It then discusses various problems that can occur at different levels, from the client to the server to cross-server, and provides solutions for issues like caching, load balancing, and communication between servers. The overall goal is to understand where bottlenecks can occur and how to optimize each component to build a scalable system that can handle high traffic loads.
AJAX allows web pages to be updated asynchronously by exchanging data with a web server behind the scenes, allowing parts of a page to change without reloading the entire page. Tuenti uses AJAX extensively to update parts of their single-page application, caching content on both client and server sides for scalability. They route requests to different server farms based on client location and cache content to improve performance. Tuenti serves billions of images per day using multiple CDNs and pre-fetches content to minimize load times.
This document discusses speeding up the ZingMe-NTVV2 application by writing a PHP extension module. It introduces NTVV2, which has high traffic volumes. Writing a PHP extension can make complicated business functions run faster and use less memory compared to pure PHP. The document explains what a PHP extension is, its lifecycle, and how to set up the build environment. It recommends using SWIG, an interface compiler, to more easily connect C/C++ programs to PHP. SWIG allows defining types, wrapping classes/functions, and exposing functions to PHP. The document provides steps for using SWIG, including defining the module, generating code, creating a project, and compiling. Caching data in the PHP module
MongoDB is a hosted database that provides scalability and high availability through cloud computing platforms. It uses authentication with a username and password configured at the database level to securely connect applications and users to cloud databases hosted with services like mLab. Connections can be made through the mongo shell using standard URI connections with the username and password or via drivers using a similar URI format.
WordPress performance can be improved by optimizing rendering speed and processing speed. Rendering speed focuses on front-end optimizations like minimizing page size through image optimization and concatenating/minifying scripts and stylesheets. Processing speed focuses on back-end optimizations like caching, using a CDN, adding expire headers, and leveraging reverse proxies and caching plugins. Nginx can be configured for caching, gzip compression, and load balancing to improve WordPress performance.
Reverse proxy & web cache with NGINX, HAProxy and Varnish
Discover the very wide world of web servers, in addition to the basic web deliverance fonctionnality, we will cover the reverse proxy, the resource caching and the load balancing.
Nginx and apache HTTPD will be used as web server and reverse proxy, and to illustrate some caching features we will also present varnish a powerful caching server.
To introduce load balancers we will compare between Nginx and Haproxy.
There are many ways to optimize your website, and it’s hard to know where to start. In this webinar we’ll show you five top performance optimizations and explain how each will impact your load time and order. We’ll also share tips and tricks on how to apply each, since the devil’s in the details. We’ll focus on the following five optimizations:
* Domain Sharding
* Consolidation
* Inlining
* Predict Head
* Asynchronous Javascript Loading
This document summarizes a presentation about designing systems to handle high loads when Chuck Norris is your customer. It discusses scaling architectures vertically and horizontally, RESTful principles, using NoSQL databases like MongoDB, caching with Memcached, search engines like Sphinx, video/image storage, and bandwidth management. It emphasizes that the right technology depends on business needs, and high-load systems require robust architectures, qualified developers, and avoiding single points of failure.
Lets look at an example of what a performant website can look like. This discuss what concepts should we be considering when looking at website performance. Next we will go over two areas pertaining to website performance: 1) website performance tweaks that you as a web developer can directly make 2) website performance tweaks that you may have to work with your hosting provider or IT department to achieve
Studies have identified speed as the single most critical factor for e-commerce conversion. There are lots of changes you could make to your website, but none of them are as risk-free as increasing speed. Some people like yellow, some like blue, but nobody likes slow. This talk will explain how to measure speed, and how to make your site much faster with minimal effort.
Basics of Web App Systems Architecture
General Web Software Optimization Strategies
Defining a Goal for Performance
Performance Metrics, tools
Performance Debugging Techniques
What Can You Control?
What Is Caching?
Drupal Performance modules
Optimizing Drupal
Large websites with large customer bases should have fast page loads no matter where your customers are coming from. In this day and age speed is expected. Getting there requires engineers to both have data and the ability to analyze and find problems.
This talk will address page load speed in two parts. A "cold" load where a user first comes to your site and a "warm" load which deals with intra-site page load speed. We will dive into the details of each page load and what is really going on. From network optimization to browser render performance, all things matter when it comes to optimizing the load of your web page. Furthermore, we will look into some tools that can be used to analyze and help developers discover and address problems.
Configuring Apache Servers for Better Web Perormance
Apache is the most popular web server in the world, yet its default configuration can't handle high traffic. Learn how to setup Apache for high performance sites and leverage many of its available modules to deliver a faster web experience for your users. Discover how Apache can max out a 1 Gbps NIC and how to serve over 140,000 pages per minute with a small Apache cluster. This presentation was given by Spark::red's founding partner Devon Hillard in March 2012 at the Boston Web Performance Meetup.
The presentation about how the site works on the Internet and what happens when you open it in your browser. What happens under the hood of the server and browser.
How to measure the performance of the CS-Cart project simply and without technical knowledge :) And of course, why all the online-performance-testing services lie, or dont provides a clear view ;)
https://www.simtechdev.com/cloud-hosting
---
Cloud hosting for CS-Cart, Multi-Vendor, WordPress, and Magento
by Simtech Development - AWS and CS-Cart certified hosting provider
free installation & migration | free 24/7 server monitoring | free daily backups | free SSL | and more...
Users expect websites and applications to be quick and reliable. A slow user experience can have a significant impact on your business. Join us for this webinar where we will show you a number of ways you can use NGINX and other tools and techniques to supercharge your application delivery, including:
- Client Caching
- Content Delivery Networks (CDN)
- OCSP stapling
- Dynamic Content Caching
View full webinar on demand at http://bit.ly/nginxsupercharge
Dynamic Content Acceleration: Lightning Fast Web Apps with Amazon CloudFront ...
Traditionally, content delivery networks (CDNs) were known to accelerate static content. Amazon CloudFront has come a long way and now supports delivery of entire websites that include dynamic and static content. In this session, we introduce you to CloudFront’s dynamic delivery features that help improve the performance, scalability, and availability of your website while helping you lower your costs. We talk about architectural patterns such as SSL termination, close proximity connection termination, origin offload with keep-alive connections, and last-mile latency improvement. Also learn how to take advantage of Amazon Route 53's health check, automatic failover, and latency-based routing to build highly available web apps on AWS.
AWS Summit London 2014 | Dynamic Content Acceleration (300)
This session is recommended for people who are new to content distribution networks (CDNs) and have a need to decrease server load and speed up their website’s load time.
In this mid-level technical session you will be able to learn more about improving the performance of web sites and web applications using Amazon CloudFront and Amazon Router 53. Learn how to assess whether your web applications will benefit from caching and how to optimize the delivery of static and dynamic content to boost performance and improve your customers' experience in using your applications.
NGINX is an HTTP request and load balancing server that powers many of the world's busiest websites. Learn why NGINX is such a popular choice, and see how it improves the capacity of web applications through HTTP intelligence and caching.
Learn more at www.nginx.com.
PyGrunn2013 High Performance Web Applications with TurboGears
TurboGears is a full-stack Python web framework that can be slowed down by its many features. The document provides tips to optimize TurboGears applications, such as only using necessary features, avoiding static file serving, leveraging caching strategically, and offloading work asynchronously. It also stresses that understanding how users interact with an application is key to optimization.
What is Nginx and Why You Should to Use it with Wordpress Hosting
Floyd Smith and the team from NGINX presented at the Wordpress San Francisco MeetUp group in June 2016. In this presentation, he illustrated how NGINX can vastly improve your Wordpress hosting performance.
Magento Meetup New Delhi- Magento2 Speed Optimization
The document discusses various techniques for optimizing Magento server performance, including using content delivery networks (CDNs), Amazon S3 storage, and reverse proxies like Nginx and Varnish. It explains that CDNs improve load times by caching static content on a global network of servers, and that S3 provides unlimited and inexpensive cloud storage. Reverse proxies can reduce origin server loads through caching, load balancing, and SSL termination. The document also provides steps for implementing AWS Cloudfront and integrating it with Magento, and configuring Varnish and Nginx as reverse proxies for Magento.
This document discusses various techniques for optimizing the frontend performance of web applications. It provides 5 rules: 1) Only optimize when it makes a meaningful difference. 2) Download resources in parallel to reduce page load time. 3) Eliminate unnecessary requests through techniques like merging, inlining, sprites and caching. 4) Defer parsing of JavaScripts when possible to improve perceived page load speeds. 5) Consider factors like server location and content delivery networks to improve global performance.
Amazon CloudFront and Amazon Route 53 can help optimize web application performance and availability. CloudFront improves performance by caching static and reusable content at edge locations and optimizing delivery of dynamic content through features like keep-alive connections and latency-based routing. Route 53 provides fast, reliable DNS services and can health check origins to improve high availability. Together, CloudFront and Route 53 provide a global network that caches content close to users and routes traffic based on network conditions to optimize performance and design for failure.
This document provides an overview of the tools available in Chrome Dev Tools for web development and performance analysis. It describes the Elements, Styles, and Resources panels for inspecting and editing pages. It also covers the Network panel for analyzing resource loading, the Timeline for performance profiling, and the Audits and PageSpeed panels for optimization suggestions. Tips are provided on using these various Dev Tools to debug issues, optimize pages, and remotely debug on devices.
The document discusses using content tagging and purging to improve caching strategies for dynamic content at the edge network. It describes how caching everything can lead to serving stale content. Instead, tagging content with surrogate keys allows caching both dynamic and static content, while purging specific resources by tag when they change. This provides better performance than low expiry caching while maintaining freshness. Purging is fast through the Fastly API. Tag-based purging allows invalidating multiple related resources at once from the edge cache.
This document provides guidance on how to properly launch a new website or application. It emphasizes the importance of thorough preparation, documentation of roles and responsibilities, effective communication practices, and testing to eliminate problems. This includes performing a site audit to identify issues, mapping processes, encouraging self-sufficiency, and load testing to ensure optimal performance and capacity under stress. The goal is to establish best practices and systems that result in flawless launches and set clients up for success.
Implementations of Fused Deposition Modeling in real world
The presentation showcases the diverse real-world applications of Fused Deposition Modeling (FDM) across multiple industries:
1. **Manufacturing**: FDM is utilized in manufacturing for rapid prototyping, creating custom tools and fixtures, and producing functional end-use parts. Companies leverage its cost-effectiveness and flexibility to streamline production processes.
2. **Medical**: In the medical field, FDM is used to create patient-specific anatomical models, surgical guides, and prosthetics. Its ability to produce precise and biocompatible parts supports advancements in personalized healthcare solutions.
3. **Education**: FDM plays a crucial role in education by enabling students to learn about design and engineering through hands-on 3D printing projects. It promotes innovation and practical skill development in STEM disciplines.
4. **Science**: Researchers use FDM to prototype equipment for scientific experiments, build custom laboratory tools, and create models for visualization and testing purposes. It facilitates rapid iteration and customization in scientific endeavors.
5. **Automotive**: Automotive manufacturers employ FDM for prototyping vehicle components, tooling for assembly lines, and customized parts. It speeds up the design validation process and enhances efficiency in automotive engineering.
6. **Consumer Electronics**: FDM is utilized in consumer electronics for designing and prototyping product enclosures, casings, and internal components. It enables rapid iteration and customization to meet evolving consumer demands.
7. **Robotics**: Robotics engineers leverage FDM to prototype robot parts, create lightweight and durable components, and customize robot designs for specific applications. It supports innovation and optimization in robotic systems.
8. **Aerospace**: In aerospace, FDM is used to manufacture lightweight parts, complex geometries, and prototypes of aircraft components. It contributes to cost reduction, faster production cycles, and weight savings in aerospace engineering.
9. **Architecture**: Architects utilize FDM for creating detailed architectural models, prototypes of building components, and intricate designs. It aids in visualizing concepts, testing structural integrity, and communicating design ideas effectively.
Each industry example demonstrates how FDM enhances innovation, accelerates product development, and addresses specific challenges through advanced manufacturing capabilities.
Details of description part II: Describing images in practice - Tech Forum 2024
This presentation explores the practical application of image description techniques. Familiar guidelines will be demonstrated in practice, and descriptions will be developed “live”! If you have learned a lot about the theory of image description techniques but want to feel more confident putting them into practice, this is the presentation for you. There will be useful, actionable information for everyone, whether you are working with authors, colleagues, alone, or leveraging AI as a collaborator.
Link to presentation recording and transcript: https://bnctechforum.ca/sessions/details-of-description-part-ii-describing-images-in-practice/
Presented by BookNet Canada on June 25, 2024, with support from the Department of Canadian Heritage.
TrustArc Webinar - 2024 Data Privacy Trends: A Mid-Year Check-In
Six months into 2024, and it is clear the privacy ecosystem takes no days off!! Regulators continue to implement and enforce new regulations, businesses strive to meet requirements, and technology advances like AI have privacy professionals scratching their heads about managing risk.
What can we learn about the first six months of data privacy trends and events in 2024? How should this inform your privacy program management for the rest of the year?
Join TrustArc, Goodwin, and Snyk privacy experts as they discuss the changes we’ve seen in the first half of 2024 and gain insight into the concrete, actionable steps you can take to up-level your privacy program in the second half of the year.
This webinar will review:
- Key changes to privacy regulations in 2024
- Key themes in privacy and data governance in 2024
- How to maximize your privacy program in the second half of 2024
Advanced Techniques for Cyber Security Analysis and Anomaly Detection
Cybersecurity is a major concern in today's connected digital world. Threats to organizations are constantly evolving and have the potential to compromise sensitive information, disrupt operations, and lead to significant financial losses. Traditional cybersecurity techniques often fall short against modern attackers. Therefore, advanced techniques for cyber security analysis and anomaly detection are essential for protecting digital assets. This blog explores these cutting-edge methods, providing a comprehensive overview of their application and importance.
YOUR RELIABLE WEB DESIGN & DEVELOPMENT TEAM — FOR LASTING SUCCESS
WPRiders is a web development company specialized in WordPress and WooCommerce websites and plugins for customers around the world. The company is headquartered in Bucharest, Romania, but our team members are located all over the world. Our customers are primarily from the US and Western Europe, but we have clients from Australia, Canada and other areas as well.
Some facts about WPRiders and why we are one of the best firms around:
More than 700 five-star reviews! You can check them here.
1500 WordPress projects delivered.
We respond 80% faster than other firms! Data provided by Freshdesk.
We’ve been in business since 2015.
We are located in 7 countries and have 22 team members.
With so many projects delivered, our team knows what works and what doesn’t when it comes to WordPress and WooCommerce.
Our team members are:
- highly experienced developers (employees & contractors with 5 -10+ years of experience),
- great designers with an eye for UX/UI with 10+ years of experience
- project managers with development background who speak both tech and non-tech
- QA specialists
- Conversion Rate Optimisation - CRO experts
They are all working together to provide you with the best possible service. We are passionate about WordPress, and we love creating custom solutions that help our clients achieve their goals.
At WPRiders, we are committed to building long-term relationships with our clients. We believe in accountability, in doing the right thing, as well as in transparency and open communication. You can read more about WPRiders on the About us page.
The DealBook is our annual overview of the Ukrainian tech investment industry. This edition comprehensively covers the full year 2023 and the first deals of 2024.
Are you interested in dipping your toes in the cloud native observability waters, but as an engineer you are not sure where to get started with tracing problems through your microservices and application landscapes on Kubernetes? Then this is the session for you, where we take you on your first steps in an active open-source project that offers a buffet of languages, challenges, and opportunities for getting started with telemetry data.
The project is called openTelemetry, but before diving into the specifics, we’ll start with de-mystifying key concepts and terms such as observability, telemetry, instrumentation, cardinality, percentile to lay a foundation. After understanding the nuts and bolts of observability and distributed traces, we’ll explore the openTelemetry community; its Special Interest Groups (SIGs), repositories, and how to become not only an end-user, but possibly a contributor.We will wrap up with an overview of the components in this project, such as the Collector, the OpenTelemetry protocol (OTLP), its APIs, and its SDKs.
Attendees will leave with an understanding of key observability concepts, become grounded in distributed tracing terminology, be aware of the components of openTelemetry, and know how to take their first steps to an open-source contribution!
Key Takeaways: Open source, vendor neutral instrumentation is an exciting new reality as the industry standardizes on openTelemetry for observability. OpenTelemetry is on a mission to enable effective observability by making high-quality, portable telemetry ubiquitous. The world of observability and monitoring today has a steep learning curve and in order to achieve ubiquity, the project would benefit from growing our contributor community.
Blockchain technology is transforming industries and reshaping the way we conduct business, manage data, and secure transactions. Whether you're new to blockchain or looking to deepen your knowledge, our guidebook, "Blockchain for Dummies", is your ultimate resource.
Invited Remote Lecture to SC21
The International Conference for High Performance Computing, Networking, Storage, and Analysis
St. Louis, Missouri
November 18, 2021
We are honored to launch and host this event for our UiPath Polish Community, with the help of our partners - Proservartner!
We certainly hope we have managed to spike your interest in the subjects to be presented and the incredible networking opportunities at hand, too!
Check out our proposed agenda below 👇👇
08:30 ☕ Welcome coffee (30')
09:00 Opening note/ Intro to UiPath Community (10')
Cristina Vidu, Global Manager, Marketing Community @UiPath
Dawid Kot, Digital Transformation Lead @Proservartner
09:10 Cloud migration - Proservartner & DOVISTA case study (30')
Marcin Drozdowski, Automation CoE Manager @DOVISTA
Pawel Kamiński, RPA developer @DOVISTA
Mikolaj Zielinski, UiPath MVP, Senior Solutions Engineer @Proservartner
09:40 From bottlenecks to breakthroughs: Citizen Development in action (25')
Pawel Poplawski, Director, Improvement and Automation @McCormick & Company
Michał Cieślak, Senior Manager, Automation Programs @McCormick & Company
10:05 Next-level bots: API integration in UiPath Studio (30')
Mikolaj Zielinski, UiPath MVP, Senior Solutions Engineer @Proservartner
10:35 ☕ Coffee Break (15')
10:50 Document Understanding with my RPA Companion (45')
Ewa Gruszka, Enterprise Sales Specialist, AI & ML @UiPath
11:35 Power up your Robots: GenAI and GPT in REFramework (45')
Krzysztof Karaszewski, Global RPA Product Manager
12:20 🍕 Lunch Break (1hr)
13:20 From Concept to Quality: UiPath Test Suite for AI-powered Knowledge Bots (30')
Kamil Miśko, UiPath MVP, Senior RPA Developer @Zurich Insurance
13:50 Communications Mining - focus on AI capabilities (30')
Thomasz Wierzbicki, Business Analyst @Office Samurai
14:20 Polish MVP panel: Insights on MVP award achievements and career profiling
If you’ve ever had to analyze a map or GPS data, chances are you’ve encountered and even worked with coordinate systems. As historical data continually updates through GPS, understanding coordinate systems is increasingly crucial. However, not everyone knows why they exist or how to effectively use them for data-driven insights.
During this webinar, you’ll learn exactly what coordinate systems are and how you can use FME to maintain and transform your data’s coordinate systems in an easy-to-digest way, accurately representing the geographical space that it exists within. During this webinar, you will have the chance to:
- Enhance Your Understanding: Gain a clear overview of what coordinate systems are and their value
- Learn Practical Applications: Why we need datams and projections, plus units between coordinate systems
- Maximize with FME: Understand how FME handles coordinate systems, including a brief summary of the 3 main reprojectors
- Custom Coordinate Systems: Learn how to work with FME and coordinate systems beyond what is natively supported
- Look Ahead: Gain insights into where FME is headed with coordinate systems in the future
Don’t miss the opportunity to improve the value you receive from your coordinate system data, ultimately allowing you to streamline your data analysis and maximize your time. See you there!
Sustainability requires ingenuity and stewardship. Did you know Pigging Solutions pigging systems help you achieve your sustainable manufacturing goals AND provide rapid return on investment.
How? Our systems recover over 99% of product in transfer piping. Recovering trapped product from transfer lines that would otherwise become flush-waste, means you can increase batch yields and eliminate flush waste. From raw materials to finished product, if you can pump it, we can pig it.
論文紹介:A Systematic Survey of Prompt Engineering on Vision-Language Foundation ...
Jindong Gu, Zhen Han, Shuo Chen, Ahmad Beirami, Bailan He, Gengyuan Zhang, Ruotong Liao, Yao Qin, Volker Tresp, Philip Torr "A Systematic Survey of Prompt Engineering on Vision-Language Foundation Models" arXiv2023
https://arxiv.org/abs/2307.12980
Optimizing web page performance involves minimizing round trips, request sizes, and payload sizes. This includes leveraging browser caching, combining and minifying assets, gzip compression, and optimizing images. Developer tools can identify optimization opportunities like unused resources and suggest techniques for faster loading and rendering.
This document provides an overview of optimizing the performance of Joomla! websites. It discusses basic principles like using content delivery networks and combining files. It recommends preparing Joomla! with tools like Firebug and enabling caching. Specific optimizations for templates and content are covered, like image resizing and subdomain delivery. Hosting configuration tips include MySQL optimization and using a CDN. The document uses a case study example and concludes with thanks.
This document discusses various techniques for improving website performance and reducing page load times, such as reducing the number and size of HTTP requests, optimizing files by minifying and compressing code, leveraging browser caching, and using content delivery networks. Some specific recommendations include minimizing unnecessary cookies, combining and compressing JavaScript and CSS files, moving scripts lower on pages, using cache headers, and testing pages on slow connections to identify bottlenecks.
You have done all the caching tricks in the book on the server side: memcache, apc, database cache and so on and squeezed every millisecond out of it, now your site is as fast as it will ever get. Well guess again !
Too often people forget that what you are effectively caching and creating with those technologies is the HTML part of the user response time, now if they are done correctly then HTML is 10 - 20% of your users response time, so there is room for a whole lot of improvements on those other 80 - 90%.
You will be taken through a couple of important steps to achieve this, such as how to optimize your JavaScript, CSS, Images, Cookies and a whole sleeve of other things that make frontend caching the magical place that it is.
After having attended this talk you will not only have learned to make your sites faster for your long term users but also people coming for the first time as well as people on slower connections.
Speed Up WordPress Websites - Part 1 - WordPress Cairo MeetupAhmed Mohammed Nagdy
Speeding up a WordPress site involves optimizing images, using a content delivery network (CDN) to improve load times, selecting fast hosting, and implementing caching. Page speed is important for user experience and retention - users leave sites that take over 4 seconds to load. Optimizing images reduces file sizes while maintaining quality. A CDN stores content on globally distributed servers to deliver pages faster. Caching saves page content for quick retrieval to improve load times.
The document discusses optimizing WordPress performance. It recommends minimizing frontend assets like images, implementing caching for assets and application chunks, optimizing themes and plugins, and choosing efficient server setups. Specific plugins like W3 Total Cache and a CDN can improve performance by up to 10 times by caching static content. Nginx is presented as a faster alternative to Apache. Overall, the key takeaways are to simplify code, minimize requests, optimize caching, and reduce payload sizes to improve perceived and actual performance.
Zingme practice for building scalable website with PHPChau Thanh
This document discusses best practices for building scalable PHP websites, as demonstrated by ZingMe's architecture. It describes how ZingMe uses a scale-out approach with load balancing, centralized session storage, and an automated code deployment system. The key aspects covered are load balancing with HAProxy, overriding PHP's session handling to use Memcached, and configuring servers identically through version control and scripts. The goal is to gracefully handle increasing traffic by adding commodity servers within 5 minutes while maintaining a consistent environment.
This document discusses optimizing PHP and web server performance. It covers using opcode caches like APC to improve PHP performance. It also discusses web performance best practices recommended by Google and Yahoo, including using CDNs, browser caching, minimizing assets, and profiling tools. The document is presented by the CTO of a mobile ad network company that sees high traffic volumes on only two servers.
The document discusses how to build a system that can handle high access requests. It covers optimizing performance at the node level and scaling to multiple nodes. It then discusses various problems that can occur at different levels, from the client to the server to cross-server, and provides solutions for issues like caching, load balancing, and communication between servers. The overall goal is to understand where bottlenecks can occur and how to optimize each component to build a scalable system that can handle high traffic loads.
AJAX allows web pages to be updated asynchronously by exchanging data with a web server behind the scenes, allowing parts of a page to change without reloading the entire page. Tuenti uses AJAX extensively to update parts of their single-page application, caching content on both client and server sides for scalability. They route requests to different server farms based on client location and cache content to improve performance. Tuenti serves billions of images per day using multiple CDNs and pre-fetches content to minimize load times.
This document discusses speeding up the ZingMe-NTVV2 application by writing a PHP extension module. It introduces NTVV2, which has high traffic volumes. Writing a PHP extension can make complicated business functions run faster and use less memory compared to pure PHP. The document explains what a PHP extension is, its lifecycle, and how to set up the build environment. It recommends using SWIG, an interface compiler, to more easily connect C/C++ programs to PHP. SWIG allows defining types, wrapping classes/functions, and exposing functions to PHP. The document provides steps for using SWIG, including defining the module, generating code, creating a project, and compiling. Caching data in the PHP module
MongoDB is a hosted database that provides scalability and high availability through cloud computing platforms. It uses authentication with a username and password configured at the database level to securely connect applications and users to cloud databases hosted with services like mLab. Connections can be made through the mongo shell using standard URI connections with the username and password or via drivers using a similar URI format.
WordPress performance can be improved by optimizing rendering speed and processing speed. Rendering speed focuses on front-end optimizations like minimizing page size through image optimization and concatenating/minifying scripts and stylesheets. Processing speed focuses on back-end optimizations like caching, using a CDN, adding expire headers, and leveraging reverse proxies and caching plugins. Nginx can be configured for caching, gzip compression, and load balancing to improve WordPress performance.
Reverse proxy & web cache with NGINX, HAProxy and VarnishEl Mahdi Benzekri
Discover the very wide world of web servers, in addition to the basic web deliverance fonctionnality, we will cover the reverse proxy, the resource caching and the load balancing.
Nginx and apache HTTPD will be used as web server and reverse proxy, and to illustrate some caching features we will also present varnish a powerful caching server.
To introduce load balancers we will compare between Nginx and Haproxy.
There are many ways to optimize your website, and it’s hard to know where to start. In this webinar we’ll show you five top performance optimizations and explain how each will impact your load time and order. We’ll also share tips and tricks on how to apply each, since the devil’s in the details. We’ll focus on the following five optimizations:
* Domain Sharding
* Consolidation
* Inlining
* Predict Head
* Asynchronous Javascript Loading
This document summarizes a presentation about designing systems to handle high loads when Chuck Norris is your customer. It discusses scaling architectures vertically and horizontally, RESTful principles, using NoSQL databases like MongoDB, caching with Memcached, search engines like Sphinx, video/image storage, and bandwidth management. It emphasizes that the right technology depends on business needs, and high-load systems require robust architectures, qualified developers, and avoiding single points of failure.
Lets look at an example of what a performant website can look like. This discuss what concepts should we be considering when looking at website performance. Next we will go over two areas pertaining to website performance: 1) website performance tweaks that you as a web developer can directly make 2) website performance tweaks that you may have to work with your hosting provider or IT department to achieve
Studies have identified speed as the single most critical factor for e-commerce conversion. There are lots of changes you could make to your website, but none of them are as risk-free as increasing speed. Some people like yellow, some like blue, but nobody likes slow. This talk will explain how to measure speed, and how to make your site much faster with minimal effort.
Basics of Web App Systems Architecture
General Web Software Optimization Strategies
Defining a Goal for Performance
Performance Metrics, tools
Performance Debugging Techniques
What Can You Control?
What Is Caching?
Drupal Performance modules
Optimizing Drupal
Large websites with large customer bases should have fast page loads no matter where your customers are coming from. In this day and age speed is expected. Getting there requires engineers to both have data and the ability to analyze and find problems.
This talk will address page load speed in two parts. A "cold" load where a user first comes to your site and a "warm" load which deals with intra-site page load speed. We will dive into the details of each page load and what is really going on. From network optimization to browser render performance, all things matter when it comes to optimizing the load of your web page. Furthermore, we will look into some tools that can be used to analyze and help developers discover and address problems.
Configuring Apache Servers for Better Web PerormanceSpark::red
Apache is the most popular web server in the world, yet its default configuration can't handle high traffic. Learn how to setup Apache for high performance sites and leverage many of its available modules to deliver a faster web experience for your users. Discover how Apache can max out a 1 Gbps NIC and how to serve over 140,000 pages per minute with a small Apache cluster. This presentation was given by Spark::red's founding partner Devon Hillard in March 2012 at the Boston Web Performance Meetup.
Website & Internet + Performance testingRoman Ananev
The presentation about how the site works on the Internet and what happens when you open it in your browser. What happens under the hood of the server and browser.
How to measure the performance of the CS-Cart project simply and without technical knowledge :) And of course, why all the online-performance-testing services lie, or dont provides a clear view ;)
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Supercharge Application Delivery to Satisfy UsersNGINX, Inc.
Users expect websites and applications to be quick and reliable. A slow user experience can have a significant impact on your business. Join us for this webinar where we will show you a number of ways you can use NGINX and other tools and techniques to supercharge your application delivery, including:
- Client Caching
- Content Delivery Networks (CDN)
- OCSP stapling
- Dynamic Content Caching
View full webinar on demand at http://bit.ly/nginxsupercharge
Dynamic Content Acceleration: Lightning Fast Web Apps with Amazon CloudFront ...Amazon Web Services
Traditionally, content delivery networks (CDNs) were known to accelerate static content. Amazon CloudFront has come a long way and now supports delivery of entire websites that include dynamic and static content. In this session, we introduce you to CloudFront’s dynamic delivery features that help improve the performance, scalability, and availability of your website while helping you lower your costs. We talk about architectural patterns such as SSL termination, close proximity connection termination, origin offload with keep-alive connections, and last-mile latency improvement. Also learn how to take advantage of Amazon Route 53's health check, automatic failover, and latency-based routing to build highly available web apps on AWS.
AWS Summit London 2014 | Dynamic Content Acceleration (300)Amazon Web Services
This session is recommended for people who are new to content distribution networks (CDNs) and have a need to decrease server load and speed up their website’s load time.
In this mid-level technical session you will be able to learn more about improving the performance of web sites and web applications using Amazon CloudFront and Amazon Router 53. Learn how to assess whether your web applications will benefit from caching and how to optimize the delivery of static and dynamic content to boost performance and improve your customers' experience in using your applications.
NGINX for Application Delivery & AccelerationNGINX, Inc.
NGINX is an HTTP request and load balancing server that powers many of the world's busiest websites. Learn why NGINX is such a popular choice, and see how it improves the capacity of web applications through HTTP intelligence and caching.
Learn more at www.nginx.com.
PyGrunn2013 High Performance Web Applications with TurboGearsAlessandro Molina
TurboGears is a full-stack Python web framework that can be slowed down by its many features. The document provides tips to optimize TurboGears applications, such as only using necessary features, avoiding static file serving, leveraging caching strategically, and offloading work asynchronously. It also stresses that understanding how users interact with an application is key to optimization.
What is Nginx and Why You Should to Use it with Wordpress HostingWPSFO Meetup Group
Floyd Smith and the team from NGINX presented at the Wordpress San Francisco MeetUp group in June 2016. In this presentation, he illustrated how NGINX can vastly improve your Wordpress hosting performance.
The document discusses various techniques for optimizing Magento server performance, including using content delivery networks (CDNs), Amazon S3 storage, and reverse proxies like Nginx and Varnish. It explains that CDNs improve load times by caching static content on a global network of servers, and that S3 provides unlimited and inexpensive cloud storage. Reverse proxies can reduce origin server loads through caching, load balancing, and SSL termination. The document also provides steps for implementing AWS Cloudfront and integrating it with Magento, and configuring Varnish and Nginx as reverse proxies for Magento.
This document discusses various techniques for optimizing the frontend performance of web applications. It provides 5 rules: 1) Only optimize when it makes a meaningful difference. 2) Download resources in parallel to reduce page load time. 3) Eliminate unnecessary requests through techniques like merging, inlining, sprites and caching. 4) Defer parsing of JavaScripts when possible to improve perceived page load speeds. 5) Consider factors like server location and content delivery networks to improve global performance.
Dynamic Content Acceleration: Amazon CloudFront and Amazon Route 53 (ARC309) ...Amazon Web Services
Amazon CloudFront and Amazon Route 53 can help optimize web application performance and availability. CloudFront improves performance by caching static and reusable content at edge locations and optimizing delivery of dynamic content through features like keep-alive connections and latency-based routing. Route 53 provides fast, reliable DNS services and can health check origins to improve high availability. Together, CloudFront and Route 53 provide a global network that caches content close to users and routes traffic based on network conditions to optimize performance and design for failure.
This document provides an overview of the tools available in Chrome Dev Tools for web development and performance analysis. It describes the Elements, Styles, and Resources panels for inspecting and editing pages. It also covers the Network panel for analyzing resource loading, the Timeline for performance profiling, and the Audits and PageSpeed panels for optimization suggestions. Tips are provided on using these various Dev Tools to debug issues, optimize pages, and remotely debug on devices.
Spreadshirt Techcamp 2018 - Hold until ToldMartin Breest
The document discusses using content tagging and purging to improve caching strategies for dynamic content at the edge network. It describes how caching everything can lead to serving stale content. Instead, tagging content with surrogate keys allows caching both dynamic and static content, while purging specific resources by tag when they change. This provides better performance than low expiry caching while maintaining freshness. Purging is fast through the Fastly API. Tag-based purging allows invalidating multiple related resources at once from the edge cache.
SANDcamp 2014 - A Perfect Launch, Every TimeJon Peck
This document provides guidance on how to properly launch a new website or application. It emphasizes the importance of thorough preparation, documentation of roles and responsibilities, effective communication practices, and testing to eliminate problems. This includes performing a site audit to identify issues, mapping processes, encouraging self-sufficiency, and load testing to ensure optimal performance and capacity under stress. The goal is to establish best practices and systems that result in flawless launches and set clients up for success.
Similar to Web performance mercadolibre - ECI 2013 (20)
Implementations of Fused Deposition Modeling in real worldEmerging Tech
The presentation showcases the diverse real-world applications of Fused Deposition Modeling (FDM) across multiple industries:
1. **Manufacturing**: FDM is utilized in manufacturing for rapid prototyping, creating custom tools and fixtures, and producing functional end-use parts. Companies leverage its cost-effectiveness and flexibility to streamline production processes.
2. **Medical**: In the medical field, FDM is used to create patient-specific anatomical models, surgical guides, and prosthetics. Its ability to produce precise and biocompatible parts supports advancements in personalized healthcare solutions.
3. **Education**: FDM plays a crucial role in education by enabling students to learn about design and engineering through hands-on 3D printing projects. It promotes innovation and practical skill development in STEM disciplines.
4. **Science**: Researchers use FDM to prototype equipment for scientific experiments, build custom laboratory tools, and create models for visualization and testing purposes. It facilitates rapid iteration and customization in scientific endeavors.
5. **Automotive**: Automotive manufacturers employ FDM for prototyping vehicle components, tooling for assembly lines, and customized parts. It speeds up the design validation process and enhances efficiency in automotive engineering.
6. **Consumer Electronics**: FDM is utilized in consumer electronics for designing and prototyping product enclosures, casings, and internal components. It enables rapid iteration and customization to meet evolving consumer demands.
7. **Robotics**: Robotics engineers leverage FDM to prototype robot parts, create lightweight and durable components, and customize robot designs for specific applications. It supports innovation and optimization in robotic systems.
8. **Aerospace**: In aerospace, FDM is used to manufacture lightweight parts, complex geometries, and prototypes of aircraft components. It contributes to cost reduction, faster production cycles, and weight savings in aerospace engineering.
9. **Architecture**: Architects utilize FDM for creating detailed architectural models, prototypes of building components, and intricate designs. It aids in visualizing concepts, testing structural integrity, and communicating design ideas effectively.
Each industry example demonstrates how FDM enhances innovation, accelerates product development, and addresses specific challenges through advanced manufacturing capabilities.
Details of description part II: Describing images in practice - Tech Forum 2024BookNet Canada
This presentation explores the practical application of image description techniques. Familiar guidelines will be demonstrated in practice, and descriptions will be developed “live”! If you have learned a lot about the theory of image description techniques but want to feel more confident putting them into practice, this is the presentation for you. There will be useful, actionable information for everyone, whether you are working with authors, colleagues, alone, or leveraging AI as a collaborator.
Link to presentation recording and transcript: https://bnctechforum.ca/sessions/details-of-description-part-ii-describing-images-in-practice/
Presented by BookNet Canada on June 25, 2024, with support from the Department of Canadian Heritage.
TrustArc Webinar - 2024 Data Privacy Trends: A Mid-Year Check-InTrustArc
Six months into 2024, and it is clear the privacy ecosystem takes no days off!! Regulators continue to implement and enforce new regulations, businesses strive to meet requirements, and technology advances like AI have privacy professionals scratching their heads about managing risk.
What can we learn about the first six months of data privacy trends and events in 2024? How should this inform your privacy program management for the rest of the year?
Join TrustArc, Goodwin, and Snyk privacy experts as they discuss the changes we’ve seen in the first half of 2024 and gain insight into the concrete, actionable steps you can take to up-level your privacy program in the second half of the year.
This webinar will review:
- Key changes to privacy regulations in 2024
- Key themes in privacy and data governance in 2024
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Advanced Techniques for Cyber Security Analysis and Anomaly DetectionBert Blevins
Cybersecurity is a major concern in today's connected digital world. Threats to organizations are constantly evolving and have the potential to compromise sensitive information, disrupt operations, and lead to significant financial losses. Traditional cybersecurity techniques often fall short against modern attackers. Therefore, advanced techniques for cyber security analysis and anomaly detection are essential for protecting digital assets. This blog explores these cutting-edge methods, providing a comprehensive overview of their application and importance.
YOUR RELIABLE WEB DESIGN & DEVELOPMENT TEAM — FOR LASTING SUCCESS
WPRiders is a web development company specialized in WordPress and WooCommerce websites and plugins for customers around the world. The company is headquartered in Bucharest, Romania, but our team members are located all over the world. Our customers are primarily from the US and Western Europe, but we have clients from Australia, Canada and other areas as well.
Some facts about WPRiders and why we are one of the best firms around:
More than 700 five-star reviews! You can check them here.
1500 WordPress projects delivered.
We respond 80% faster than other firms! Data provided by Freshdesk.
We’ve been in business since 2015.
We are located in 7 countries and have 22 team members.
With so many projects delivered, our team knows what works and what doesn’t when it comes to WordPress and WooCommerce.
Our team members are:
- highly experienced developers (employees & contractors with 5 -10+ years of experience),
- great designers with an eye for UX/UI with 10+ years of experience
- project managers with development background who speak both tech and non-tech
- QA specialists
- Conversion Rate Optimisation - CRO experts
They are all working together to provide you with the best possible service. We are passionate about WordPress, and we love creating custom solutions that help our clients achieve their goals.
At WPRiders, we are committed to building long-term relationships with our clients. We believe in accountability, in doing the right thing, as well as in transparency and open communication. You can read more about WPRiders on the About us page.
The DealBook is our annual overview of the Ukrainian tech investment industry. This edition comprehensively covers the full year 2023 and the first deals of 2024.
Are you interested in dipping your toes in the cloud native observability waters, but as an engineer you are not sure where to get started with tracing problems through your microservices and application landscapes on Kubernetes? Then this is the session for you, where we take you on your first steps in an active open-source project that offers a buffet of languages, challenges, and opportunities for getting started with telemetry data.
The project is called openTelemetry, but before diving into the specifics, we’ll start with de-mystifying key concepts and terms such as observability, telemetry, instrumentation, cardinality, percentile to lay a foundation. After understanding the nuts and bolts of observability and distributed traces, we’ll explore the openTelemetry community; its Special Interest Groups (SIGs), repositories, and how to become not only an end-user, but possibly a contributor.We will wrap up with an overview of the components in this project, such as the Collector, the OpenTelemetry protocol (OTLP), its APIs, and its SDKs.
Attendees will leave with an understanding of key observability concepts, become grounded in distributed tracing terminology, be aware of the components of openTelemetry, and know how to take their first steps to an open-source contribution!
Key Takeaways: Open source, vendor neutral instrumentation is an exciting new reality as the industry standardizes on openTelemetry for observability. OpenTelemetry is on a mission to enable effective observability by making high-quality, portable telemetry ubiquitous. The world of observability and monitoring today has a steep learning curve and in order to achieve ubiquity, the project would benefit from growing our contributor community.
Blockchain technology is transforming industries and reshaping the way we conduct business, manage data, and secure transactions. Whether you're new to blockchain or looking to deepen your knowledge, our guidebook, "Blockchain for Dummies", is your ultimate resource.
The Rise of Supernetwork Data Intensive ComputingLarry Smarr
Invited Remote Lecture to SC21
The International Conference for High Performance Computing, Networking, Storage, and Analysis
St. Louis, Missouri
November 18, 2021
UiPath Community Day Kraków: Devs4Devs ConferenceUiPathCommunity
We are honored to launch and host this event for our UiPath Polish Community, with the help of our partners - Proservartner!
We certainly hope we have managed to spike your interest in the subjects to be presented and the incredible networking opportunities at hand, too!
Check out our proposed agenda below 👇👇
08:30 ☕ Welcome coffee (30')
09:00 Opening note/ Intro to UiPath Community (10')
Cristina Vidu, Global Manager, Marketing Community @UiPath
Dawid Kot, Digital Transformation Lead @Proservartner
09:10 Cloud migration - Proservartner & DOVISTA case study (30')
Marcin Drozdowski, Automation CoE Manager @DOVISTA
Pawel Kamiński, RPA developer @DOVISTA
Mikolaj Zielinski, UiPath MVP, Senior Solutions Engineer @Proservartner
09:40 From bottlenecks to breakthroughs: Citizen Development in action (25')
Pawel Poplawski, Director, Improvement and Automation @McCormick & Company
Michał Cieślak, Senior Manager, Automation Programs @McCormick & Company
10:05 Next-level bots: API integration in UiPath Studio (30')
Mikolaj Zielinski, UiPath MVP, Senior Solutions Engineer @Proservartner
10:35 ☕ Coffee Break (15')
10:50 Document Understanding with my RPA Companion (45')
Ewa Gruszka, Enterprise Sales Specialist, AI & ML @UiPath
11:35 Power up your Robots: GenAI and GPT in REFramework (45')
Krzysztof Karaszewski, Global RPA Product Manager
12:20 🍕 Lunch Break (1hr)
13:20 From Concept to Quality: UiPath Test Suite for AI-powered Knowledge Bots (30')
Kamil Miśko, UiPath MVP, Senior RPA Developer @Zurich Insurance
13:50 Communications Mining - focus on AI capabilities (30')
Thomasz Wierzbicki, Business Analyst @Office Samurai
14:20 Polish MVP panel: Insights on MVP award achievements and career profiling
Coordinate Systems in FME 101 - Webinar SlidesSafe Software
If you’ve ever had to analyze a map or GPS data, chances are you’ve encountered and even worked with coordinate systems. As historical data continually updates through GPS, understanding coordinate systems is increasingly crucial. However, not everyone knows why they exist or how to effectively use them for data-driven insights.
During this webinar, you’ll learn exactly what coordinate systems are and how you can use FME to maintain and transform your data’s coordinate systems in an easy-to-digest way, accurately representing the geographical space that it exists within. During this webinar, you will have the chance to:
- Enhance Your Understanding: Gain a clear overview of what coordinate systems are and their value
- Learn Practical Applications: Why we need datams and projections, plus units between coordinate systems
- Maximize with FME: Understand how FME handles coordinate systems, including a brief summary of the 3 main reprojectors
- Custom Coordinate Systems: Learn how to work with FME and coordinate systems beyond what is natively supported
- Look Ahead: Gain insights into where FME is headed with coordinate systems in the future
Don’t miss the opportunity to improve the value you receive from your coordinate system data, ultimately allowing you to streamline your data analysis and maximize your time. See you there!
Sustainability requires ingenuity and stewardship. Did you know Pigging Solutions pigging systems help you achieve your sustainable manufacturing goals AND provide rapid return on investment.
How? Our systems recover over 99% of product in transfer piping. Recovering trapped product from transfer lines that would otherwise become flush-waste, means you can increase batch yields and eliminate flush waste. From raw materials to finished product, if you can pump it, we can pig it.
論文紹介:A Systematic Survey of Prompt Engineering on Vision-Language Foundation ...Toru Tamaki
Jindong Gu, Zhen Han, Shuo Chen, Ahmad Beirami, Bailan He, Gengyuan Zhang, Ruotong Liao, Yao Qin, Volker Tresp, Philip Torr "A Systematic Survey of Prompt Engineering on Vision-Language Foundation Models" arXiv2023
https://arxiv.org/abs/2307.12980
論文紹介:A Systematic Survey of Prompt Engineering on Vision-Language Foundation ...
Web performance mercadolibre - ECI 2013
1. Techniques, tips and tools for improve
and measure web performance.
Web Performance
MercadoLibre
Santiago Aimetta
Nicolas Brizuela
2. Why performance?
Reducing time to response, impact
directly in your revenues.
Impact directly in the bounce rate,
conversions rate and is very important for
user experience.
4. Amazon test 2008
● + 100ms >> -1% sales
Bing test 2009
● + 2000ms >> -4.3% revenues/user
MercadoLibre 2013
● + 3000ms >> + 3% in Bounce rate
-1% in Revenues
6. Performance golden rules
● 80-90% of the end-user response time is spent on the
frontend.
We start there
● Greater potential
● Simple
● Proven to work
10. What is this?
Is the amount of time between the client
makes an HTTP request and the browser
starts receiving the first byte.
How much time is spent making the
request until receive the first byte of the
response.
11. 1. DNS LOOKUP
2. INITIAL CONNECTION
3. WAITING
4. RECEIVING DATA
5. CLOSING CONNECTION
12. 1. DNS LOOKUP
2. INITIAL CONNECTION
3. WAITING
4. RECEIVING DATA
5. CLOSING CONNECTION
13. 1. DNS LOOKUP
2. INITIAL CONNECTION
3. WAITING
4. RECEIVING DATA
5. CLOSING CONNECTION
14. 1. DNS LOOKUP
2. INITIAL CONNECTION
3. WAITING
4. RECEIVING DATA
5. CLOSING CONNECTION
15. 1. DNS LOOKUP
2. INITIAL CONNECTION
3. WAITING
4. RECEIVING DATA
5. CLOSING CONNECTION
<< Time to first Byte = TTFB
17. ● Static content
○ Such as Html, Js, Css and images
○ Should be under 100 miliseconds
● Dinamic content
○ Includes all the server side processing plus the
network infrastructure work
○ Should be beetween 200 and 500 miliseconds
28. ● Group of servers distributed in multiple datacenters
across the internet
● The CDN serves the content using the servers that
are closer to the client
● The network latency is reduced by the proximity
between client and server.
30. ● The resources can be cached
● Multiple servers prevent bottlenecks
● Useful for static resources like Html, Css, fonts , Js,
videos , images, documents, etc
32. ● Type of http compression like deflate
● This saves bandwidth and increases speed.
● Web client (i.e Browser) sends an Accept-Encoding :
gzip, deflate header
● Web server responds Content-Encoding : gzip if the
data is compressed
34. ● Reduce the 70%-90% of the response size
● Use in Html, Css, Js, Xml, Json
● Dont use in Pdf and images, they are already
compressed
● Better compression tips:
○ Sorted key values : Css, html attributes
○ use one type of quotes, " or '
○ Css and Js minification
36. Benefits
● Saves requests to resources that changes
infrequently.
● HTTP caching saves the resources in the
browser or the proxy.
● Should be cached: CSS, JS, Static HTML, Images,
Flash, Pdf, media files.
39. Response Headers
● Strong ones:
○ These headers express the resource lifetime.
○ The value is a date or a timestamp.
○ A resource is downloaded again when the
expiration date is reached.
○ Expires and Cache Control.
40. Response Headers
● Weak ones:
○ Specifies characteristics to identify if the
resource change
○ The browser sends conditional GETs to check
○ Last-Modified, Etag
42. Expires
● Sets an expiration date in the future.
● if Cache-control and expires are set for the same.
resource Cache-control takes precedence.
● i.e: Expires: Mon, 8 Jul 2013 21:31:12 GMT.
43. Last modified
● Is a time based header.
● The application specifies the last modified header
i.e: Last-Modified: Tue, 09 jul 2013 17:45:57 GMT.
● The next time the browser sends a conditional GET
asking if the resource has changed
i.e If-Modified-Since: Tue, 09 jul 2013 17:45:57 GMT.
● If the resource hasn't changed the server return an
empty response with the 304 code (Not Modified)
44. Etag
● Use an md5 hash to identify if the resource change.
ETag: "15f0fff99ed5aae4edffdd6496d7131f".
● In the next request the header If-None-Match is sent
with the ETag value
i.e: If-None-Match: "15f0fff99ed5aae4edffdd6496d7131f"
● If the ETag match, the server responds 304
45. Tools
● Most of browser tools has a network analyzer
● The example below were made with Chrome dev tool
46. Tips
● For static content: use Cache-Control.
● Cache-Control is easy to check.
● Avoid conditional Gets.
● Use the app version or a fingerprint in the url.
47. Tips
● For private content: use Cache-Control :
private to avoid proxy caching.
● Prevent caching: use Cache-Control:no-cache,
no-store.
● Urls with query string.
49. ● Client and server keep the connection open,
unless the client indicates otherwise (via
Connection: close header).
● Http connections are expensive.
● Saves TCP handshake ( 150 ms average ).
50. ● Persistent connections send multiple request and
response interactions over single connection.
● If the connection is not persistent you can specify a
time out.
52. Advantages
● CPU & memory savings, less tcp connections and
fewer TCP control blocks.
● Allows request and response pipelining.
● Reduce network load, less packets sent.
● Supported by modern browsers.
54. How it works?
● Images can be downloaded in parallel
● JS and CSS..other story
55. ● Loading steps
○ downloading (can be parallel )
○ parsing
○ executing
● Rules
○ Scripts prevents other scripts to be downloaded
and parsed
○ Stylessheets prevent scripts to be downloaded
and parsed
○ Modern browsers start looking ahead in the
document and pre-loading stylesheets and scripts
56. The HTTP/1.1 RFC
A single-user client SHOULD NOT
maintain more than 2 connections with
any server or proxy.
57. The HTTP/1.1 RFC
A single-user client SHOULD NOT
maintain more than 2 connections with
any server or proxy.
58. IE 6 and 7: 2
IE 8: 6
IE 9: 6
IE 10: 8
Firefox 2: 2
Firefox 3: 6
Firefox 4 to 17: 6
Opera 9.63: 4
Opera 10: 8
Opera 11 and 12: 6
Chrome 1 and 2: 6
Chrome 3: 4
Chrome 4 to 28: 6
Safari 3 and 4: 4
How browsers handle it?
● Browsers don't have to follow
this guideline.
● Parallel connections.
59. Nice trick!
● The number of parallel connections applies to a
server.
● Use multiple domain names
○ i.e resources1.domain.com, resources2.
domain.com
○ Expands per server connection limit.
○ If the domains are CNAMEs of the same ip,
works too!
63. Objective
● Minimize the request overhead
● Cut down on client request time by reducing the
number of bytes uploaded as request header data
● Average request size is 1500 bytes.
64. How
● Keeping cookies and request headers as small as
possible ensures that an HTTP request can fit into a
single packet.
● Small urls.
● Small cookies.
● Remove unused header.
66. Static content
● Objective:
○ If you set a cookie in particular domain, all
subsequent HTTP requests for that domain must
include the cookie.
○ Static content, such as images, JS and CSS files,
don't need to be accompanied by cookies.
○ Avoid caching user info.
67. Static content
● How:
○ Create a domain for static content
○ Use caching headers
○ CDNs avoid cookies
74. Where and why?
● In the head: RUM, analytics
● before </body>: scripts needed by page load
● After page load: scripts needed soon after
page load
● On demand: In reaction to users
82. Avoid blocking - onload event
● Blocks onload event until the script have been
downloaded and executed
○ script defer
○ script async
○ script dom element
● Fix
○ If you want to ensure that the JavaScript doesn't
start to download or execute until after the load
event, you can insert it using the window.onload
event handler:
84. Sometimes the image weight its 40-50% of
the complete page weight
Image Optimization
85. Lossless optimizations
● Are those that take an image and produce another
image, which renders exactly the same and it's
smaller in file size than the original
● The lossless file size savings come from:
○ Using better compression algorithms to store the
pixel information.
○ Removing unneeded metadata that goes with the
image file.
86. GIF
● The best way to optimize a GIF image is to convert it
to PNG8.
● It can store up to 256 colors, just like GIF.
● PNG8 supports alpha transparency.
● Software:
○ Photoshop
○ OptiPNG
● Animated GIF
○ Don't convert to PNG
○ Software:
■ GIFSicle
91. JPEG Progressive
● Two types of images, baseline and progressive
● Baseline jpeg: is a full-resolution top-to-bottom scan
of the image
92. JPEG Progressive
● Progressive jpeg: is a series of scans of increasing
quality, loads from low quality to high in several
"passes"
93. JPEG Progressive
● The progressive jpeg’s first pass is low-resolution, but
it contains as much information, or more, as the small
image
● Software:
○ jpegtran
○ jpegcrop
● Images of file size 10K and over have a better chance
of being smaller when using the progressive JPEG
format
95. WebP
● What is?
○ is a new image format that provides lossless and
lossy compression for images on the web
● 26% smaller than PNG
● 25-34% smaller than JPEG
● Supports transparency ( alpha channel )
96. WebP
● Software
○ CwebP
○ DwebP
○ libwebp
● Support
○ Chrome 9+
○ Opera 12+
○ Android 4+
○ Opera mobile 11+
○ Chrome for android 27+