Web performance optimization can be done at three levels - general, server-side, and technology. At the general level, techniques include minimizing HTTP requests, optimizing images, minifying files, avoiding redirects and empty sources. Server-side optimizations involve techniques like content delivery networks, cookie-free domains, caching, and gzip compression. At the technology level for dynamic sites like Joomla, optimizations include flushing buffers early and optimizing database queries. Performance can be measured using various online tools.
In this presentation, I have shown how a webpage is loaded on your viewport after you request for the same. The process is simple. Once you click on the URL, the browser makes a request to the webserver. The request is processed by the webserver.
Web server files the response to the request and sends it to the browser. The requested page is sent to the web browser. The browser then loads and renders the page content. The requested page is then shown on the viewport.
hether you run a high traffic WordPress installation or a small blog on a low cost shared host, you should optimize WordPress and your server to run as efficiently as possible. This article provides a broad overview of WordPress optimization with specific recommended approaches. However, it's not a detailed technical explanation of each aspect.
WPblog's Ultimate WordPress Guide to Boost Your Website Performance
Your website performance is crucial to its success. It is essential that you analyse your website’s speed and take critical steps to improve performance metrics. If you don’t, If you don’t, not only do you lose visitors, but you might be losing a lot of business as well.
For this reason, WPblog has released a complete guide on WordPress performance optimization where you can learn how to analyse your website speed, and improve its performance.
Source: https://www.wpblog.com/ebook-library/wordpress-performance-optimization
1. Definition of Web performance.
2. Why Important.
3. Webpage Rendering.
4. Browsers render.
5. Web Performance Rules.
6. Web Performance Tools.
7. Research
The document discusses page speed and provides tips for optimizing website page speed. It introduces tools like Google Page Speed and Yahoo YSlow for measuring page speed. It then provides steps on how to use these tools and makes recommendations for improving page speed through image optimization, CSS and JavaScript minification, reducing errors, caching assets, and reducing the number of HTTP requests and third party widgets.
Boosting your conversion rate through web performance improvements
This document discusses ways to improve web performance and boost conversion rates. It begins by explaining how slow page loads can negatively impact businesses, costing Amazon $1.6 billion per year for every second of slowdown. The document then discusses various metrics that impact performance like page size, number of HTTP requests and JavaScript size. It provides tips for testing and improving performance, such as optimizing images, minifying files, leveraging caching and CDNs. The document stresses that web performance optimization is an ongoing process of testing, setting budgets and refactoring code over time.
A performance optimization presentation for WordCamp Sacramento 2016. Presented by Austin Gil.
This presentation addresses issues in design, development, and project management, where performance is most greatly affected. We look at various opportunities and techniques within each stage that may offer more speed. The subjects range from beginner to advanced with tips and advice that just about anyone can walk away with, and we end with a collection of recommended tools.
This presentation was designed so the slides would be useful even out of context of the presentation. Please enjoy.
A presentation from SEO Campixx Barcamp 2011 in Berlin. Web Performance Optimization is about making websites faster. Here i discussed different measures and show the impact on competitive advantage and possibly rankings on Google. Undeniably you can say that better performance leads to more sales and better usability in terms of bouncing rates. View image slides here: http://b0i.de/wpopresentation
SearchLove San Diego 2018 | Tom Anthony | An Introduction to HTTP/2 & Service...
HTTP/2 and Service Works are becoming more established, yet the SEO community lacks awareness of what they are what they may mean for us. A lot of us know we need to know about them but we manage to keep putting it off. However, for both of these technologies, the next 12 months are going to be the turning point where we really can't avoid learning more about them. Tom will provide and accessible introduction to both, with a focus on what they are, how they work and what SEOs need to know. If you have been scared of jumping in to them until now, this session will help get you up to speed.
Ctrl+F5 Bangalore 2017: Super charge you word press website by Justin Thomas
Justin delves into the issues encountered by WordPress Developers and Designers with different kinds of Hosting, looks at the solutions, learns how to ensure limits are not breached with your hosting provider and how to get the best performance for your website without overspending on infrastructure.
This document discusses Core Web Vitals, which are user-centric web performance metrics defined by Google. It introduces the three Core Web Vitals: Largest Contentful Paint (LCP), First Input Delay (FID), and Cumulative Layout Shift (CLS). Thresholds for what is considered good, adequate, or needs improvement are provided for each metric. The document also outlines tools that can be used to measure Core Web Vitals and explains how real user monitoring is important for field testing Core Web Vitals performance.
The document summarizes strategies for optimizing local search engine results. It discusses using structured data to provide location and contact information, gathering reviews and testimonials, creating geo-sitemap files, and mobilizing websites. Plugins and tools are recommended for implementing structured data, collecting testimonials, and creating responsive mobile designs. The presentation provides specific techniques for local businesses to improve their search engine visibility and customer interactions.
This document summarizes Andy Melichar's presentation at WordCamp Omaha about optimizing WordPress performance. He began with introductions and explained his background in web development. He then discussed common performance issues hosting companies see and why performance matters for user experience and revenue. Andy outlined key areas to optimize like WordPress plugins/themes, web server configuration, and using content delivery networks. He demonstrated the significant impact of enabling caching, compression, browser caching and switching to Nginx on a test site's performance. In the end, Andy emphasized there are many options to try and the WordPress community can help with configurations.
The document provides best practices for optimizing frontend performance by reducing page load time. It discusses ways to reduce the number of HTTP requests, DNS lookups, redirects and duplicate scripts. It also recommends techniques like minifying assets, leveraging caching, prioritizing critical components, optimizing images and using content delivery networks.
This document discusses various techniques for improving the frontend performance of Drupal websites. It begins by introducing the speaker and describing the goals of the presentation. The bulk of the document then provides recommendations in three areas: backend server optimizations like caching, parallel downloads and gzip compression; tools for measuring performance; and frontend optimizations like minimizing requests, lazy loading images, and improving CSS and JavaScript. The document encourages proper performance diagnosis and defines goals before implementing solutions.
Front end optimization is important because 80% of end-user response time is spent on the front-end and front-end optimization can cut page load times by 25-50%. Page load times significantly impact user experience and business metrics. Tools like Yslow and Google PageSpeed can help identify optimization opportunities. Image optimization, minimizing HTTP requests by combining files, and reducing payload sizes are some techniques that should be applied from the start of a project. Progressive page loading, splitting components across domains, browser caching, and preloading components can further improve performance.
The document provides tips for optimizing web page performance based on Yahoo's YSlow guidelines. It discusses 12 tips, including making fewer HTTP requests, using a content delivery network, adding expires headers, gzipping components, putting CSS at the top, moving scripts to the bottom, avoiding CSS expressions, making JavaScript and CSS external, reducing DNS lookups, minifying JavaScript, avoiding redirects, and removing duplicate scripts. It also discusses optimizing JavaScript performance through choosing optimal algorithms and data structures, refactoring code, minimizing DOM interactions, and using local optimizations. Measurement of performance is recommended at each stage of the optimization process.
The document discusses how web browsers render web pages in 5 stages:
1) Constructing the object model from HTML tags and content
2) Creating the render tree by omitting non-visible nodes
3) Calculating layout and positioning during the layout stage
4) Painting pixels on the screen during the paint stage
5) Composite layers are ordered and combined during the composite stage
It provides tips for optimizing performance such as minimizing critical resources, leveraging caching, prioritizing content, and reducing reflows and repaints.
In this session we will present an overview from the point of view 'system that implementative on how to get the best performance from your drupal application.
We will also show examples of use cases for drupal scalable infrastructure.
Speed up your site! #wcmtl2015 by Meagan HanesMeagan Hanes
7 ways to speed up a website are discussed: choosing a lightweight theme, disabling unnecessary plugins, optimizing files by minifying CSS/JS and image compression, implementing caching, using a content delivery network (CDN), cleaning up the database, and optimizing theme and plugin performance. The document provides details on each method, emphasizing measuring site speed before and after changes, using appropriate tools, and backing up the site when making optimizations. The overall message is that many small improvements can significantly increase site speed.
How to Fix a Slow WordPress Site (and get A+ scores)Lewis Ogden
Full Guide - https://bitsfrombytes.com/why-is-wordpress-slow/
In this site speed optimization guide, we provide 25-Tips to get blazing fast website speeds of under 0.5s.
In this presentation, I have shown how a webpage is loaded on your viewport after you request for the same. The process is simple. Once you click on the URL, the browser makes a request to the webserver. The request is processed by the webserver.
Web server files the response to the request and sends it to the browser. The requested page is sent to the web browser. The browser then loads and renders the page content. The requested page is then shown on the viewport.
hether you run a high traffic WordPress installation or a small blog on a low cost shared host, you should optimize WordPress and your server to run as efficiently as possible. This article provides a broad overview of WordPress optimization with specific recommended approaches. However, it's not a detailed technical explanation of each aspect.
WPblog's Ultimate WordPress Guide to Boost Your Website Performance Jessica Ervin
Your website performance is crucial to its success. It is essential that you analyse your website’s speed and take critical steps to improve performance metrics. If you don’t, If you don’t, not only do you lose visitors, but you might be losing a lot of business as well.
For this reason, WPblog has released a complete guide on WordPress performance optimization where you can learn how to analyse your website speed, and improve its performance.
Source: https://www.wpblog.com/ebook-library/wordpress-performance-optimization
1. Definition of Web performance.
2. Why Important.
3. Webpage Rendering.
4. Browsers render.
5. Web Performance Rules.
6. Web Performance Tools.
7. Research
The document discusses page speed and provides tips for optimizing website page speed. It introduces tools like Google Page Speed and Yahoo YSlow for measuring page speed. It then provides steps on how to use these tools and makes recommendations for improving page speed through image optimization, CSS and JavaScript minification, reducing errors, caching assets, and reducing the number of HTTP requests and third party widgets.
Boosting your conversion rate through web performance improvementsAlyss Noland
This document discusses ways to improve web performance and boost conversion rates. It begins by explaining how slow page loads can negatively impact businesses, costing Amazon $1.6 billion per year for every second of slowdown. The document then discusses various metrics that impact performance like page size, number of HTTP requests and JavaScript size. It provides tips for testing and improving performance, such as optimizing images, minifying files, leveraging caching and CDNs. The document stresses that web performance optimization is an ongoing process of testing, setting budgets and refactoring code over time.
A performance optimization presentation for WordCamp Sacramento 2016. Presented by Austin Gil.
This presentation addresses issues in design, development, and project management, where performance is most greatly affected. We look at various opportunities and techniques within each stage that may offer more speed. The subjects range from beginner to advanced with tips and advice that just about anyone can walk away with, and we end with a collection of recommended tools.
This presentation was designed so the slides would be useful even out of context of the presentation. Please enjoy.
A presentation from SEO Campixx Barcamp 2011 in Berlin. Web Performance Optimization is about making websites faster. Here i discussed different measures and show the impact on competitive advantage and possibly rankings on Google. Undeniably you can say that better performance leads to more sales and better usability in terms of bouncing rates. View image slides here: http://b0i.de/wpopresentation
SearchLove San Diego 2018 | Tom Anthony | An Introduction to HTTP/2 & Service...Distilled
HTTP/2 and Service Works are becoming more established, yet the SEO community lacks awareness of what they are what they may mean for us. A lot of us know we need to know about them but we manage to keep putting it off. However, for both of these technologies, the next 12 months are going to be the turning point where we really can't avoid learning more about them. Tom will provide and accessible introduction to both, with a focus on what they are, how they work and what SEOs need to know. If you have been scared of jumping in to them until now, this session will help get you up to speed.
Ctrl+F5 Bangalore 2017: Super charge you word press website by Justin ThomasResellerClub
Justin delves into the issues encountered by WordPress Developers and Designers with different kinds of Hosting, looks at the solutions, learns how to ensure limits are not breached with your hosting provider and how to get the best performance for your website without overspending on infrastructure.
This document discusses Core Web Vitals, which are user-centric web performance metrics defined by Google. It introduces the three Core Web Vitals: Largest Contentful Paint (LCP), First Input Delay (FID), and Cumulative Layout Shift (CLS). Thresholds for what is considered good, adequate, or needs improvement are provided for each metric. The document also outlines tools that can be used to measure Core Web Vitals and explains how real user monitoring is important for field testing Core Web Vitals performance.
The document summarizes strategies for optimizing local search engine results. It discusses using structured data to provide location and contact information, gathering reviews and testimonials, creating geo-sitemap files, and mobilizing websites. Plugins and tools are recommended for implementing structured data, collecting testimonials, and creating responsive mobile designs. The presentation provides specific techniques for local businesses to improve their search engine visibility and customer interactions.
This document summarizes Andy Melichar's presentation at WordCamp Omaha about optimizing WordPress performance. He began with introductions and explained his background in web development. He then discussed common performance issues hosting companies see and why performance matters for user experience and revenue. Andy outlined key areas to optimize like WordPress plugins/themes, web server configuration, and using content delivery networks. He demonstrated the significant impact of enabling caching, compression, browser caching and switching to Nginx on a test site's performance. In the end, Andy emphasized there are many options to try and the WordPress community can help with configurations.
The document provides best practices for optimizing frontend performance by reducing page load time. It discusses ways to reduce the number of HTTP requests, DNS lookups, redirects and duplicate scripts. It also recommends techniques like minifying assets, leveraging caching, prioritizing critical components, optimizing images and using content delivery networks.
This document discusses various techniques for improving the frontend performance of Drupal websites. It begins by introducing the speaker and describing the goals of the presentation. The bulk of the document then provides recommendations in three areas: backend server optimizations like caching, parallel downloads and gzip compression; tools for measuring performance; and frontend optimizations like minimizing requests, lazy loading images, and improving CSS and JavaScript. The document encourages proper performance diagnosis and defines goals before implementing solutions.
Front end optimization is important because 80% of end-user response time is spent on the front-end and front-end optimization can cut page load times by 25-50%. Page load times significantly impact user experience and business metrics. Tools like Yslow and Google PageSpeed can help identify optimization opportunities. Image optimization, minimizing HTTP requests by combining files, and reducing payload sizes are some techniques that should be applied from the start of a project. Progressive page loading, splitting components across domains, browser caching, and preloading components can further improve performance.
The document provides tips for optimizing web page performance based on Yahoo's YSlow guidelines. It discusses 12 tips, including making fewer HTTP requests, using a content delivery network, adding expires headers, gzipping components, putting CSS at the top, moving scripts to the bottom, avoiding CSS expressions, making JavaScript and CSS external, reducing DNS lookups, minifying JavaScript, avoiding redirects, and removing duplicate scripts. It also discusses optimizing JavaScript performance through choosing optimal algorithms and data structures, refactoring code, minimizing DOM interactions, and using local optimizations. Measurement of performance is recommended at each stage of the optimization process.
The document discusses how web browsers render web pages in 5 stages:
1) Constructing the object model from HTML tags and content
2) Creating the render tree by omitting non-visible nodes
3) Calculating layout and positioning during the layout stage
4) Painting pixels on the screen during the paint stage
5) Composite layers are ordered and combined during the composite stage
It provides tips for optimizing performance such as minimizing critical resources, leveraging caching, prioritizing content, and reducing reflows and repaints.
In this session we will present an overview from the point of view 'system that implementative on how to get the best performance from your drupal application.
We will also show examples of use cases for drupal scalable infrastructure.
This white paper discusses various methods for optimizing performance on Magento, an ecommerce platform. It begins with basic optimizations like minifying files, optimizing images, enabling caching and gzip compression. More advanced techniques include implementing memcached, Redis and Varnish caching, using a content delivery network, optimizing the database with measures like flat categories and products. The paper provides details on implementing each technique and the benefits to Magento performance. Key contacts at the authoring company RetailOn are provided.
Damien Pobel, expert technique PHP chez Smile, a animé une conférence sur le thème des front-end performances avec eZ Publish.
Les slides de sa présentation exposant quelques spécificités liées à eZ Publish sont disponibles ici.
SEO 101 - Google Page Speed Insights Explained Steve Weber
During our second SEO webinar lesson, we spoke about the importance of site speed. We ran through an explanation of the Google Page Speed insights tool and how to take care of the most common optimizations the tool sugests to site oweners.
Presentation from June 2013, Surrey, BC, Drupal Group meetup.
- Some tips how to improve Drupal 7 performance.
- Get Drupal 7 working faster
- Optimize code in order to get proper responses
- Use cache (memcache, APC cache, entity cache, varnish)
- Scale Drupal horizontally in order to balance load
The document provides tips for building a scalable and high-performance website, including using caching, load balancing, and monitoring. It discusses horizontal and vertical scalability, and recommends planning, testing, and version control. Specific techniques mentioned include static content caching, Memcached, and the YSlow performance tool.
The website speed makes the first impression about your business. It’s essential to understand that you won’t get a second chance when it comes to user experience. Low website speed is one of the most frustrating things that will turn people off about your resource. High-performance websites results in high return visits, low bounce rates, higher conversions, engagement, higher ranks in organic search, and better user experience. By reducing the page load time you will positively impact marketing and sales processes. You’ll get higher traffic and attract more qualified leads that can be converted into customers.
Magento sites need optimization to load fast and provide a good user experience. Speeding up a site increases sales and improves SEO. Factors that impact load time include network transfers and the resource-intensive nature of Magento. Benchmarking tools like APDEX, Funkload, Yslow and Pagespeed help measure performance and set goals, such as loading the homepage in under 1.5 seconds. Architectures must be sized properly and include techniques like splitting front and back ends, enabling caching, and using a CDN. The Nitrogento extension automates optimizations like blocking caching, sprite generation, and asset minification to significantly improve performance.
1. The document provides recommendations for optimizing HTML templates for speed and SEO, including combining external JavaScript and CSS, leveraging browser caching for static resources, minifying files, parallelizing downloads, and optimizing image usage.
2. It recommends techniques to improve page loading speed such as minimizing HTTP requests, compressing content, reducing payload sizes, specifying dimensions for images, and optimizing the order of stylesheets and scripts.
3. Caching, compression, minification, optimizing images, and using a content delivery network can all help reduce page load times and improve the user experience.
This document discusses optimizing the client-side performance of websites. It describes how reducing HTTP requests through techniques like image maps, CSS sprites, and combining scripts and stylesheets can improve response times. It also recommends strategies like using a content delivery network, adding expiration headers, compressing components, correctly structuring CSS and scripts, and optimizing JavaScript code and Ajax implementations. The benefits of a performant front-end are emphasized, as client-side optimizations often require less time and resources than back-end changes.
This document summarizes several open-source website performance tools including Google Page Speed, Google Closure Compiler, Cuzillion, and Dustme Selectors. It notes that these tools can help optimize websites by reducing file sizes, identifying unused code, improving loading performance, and finding other optimization opportunities to improve page speeds. Faster websites can significantly impact key metrics like traffic, sales, and mobile experience.
This document provides tips for improving the performance of ASP.NET applications. It discusses ways to optimize ASP.NET pages by reducing page size, minimizing viewstate, and adding caching. It also recommends optimizing database queries, using asynchronous calls judiciously, and profiling SQL to identify inefficient queries. Configuration tips include enabling compression, removing unnecessary HTTP modules, and setting the application pool start mode to AlwaysRunning.
This document discusses techniques for improving web performance. It begins with research on how caching and cookies impact performance. It then outlines 14 rules for optimizing performance, such as making fewer HTTP requests, using content delivery networks, gzipping components, placing scripts at the bottom of pages, and avoiding redirects. Case studies demonstrate how following these rules can significantly improve page load times. The document emphasizes starting performance improvements by focusing on front-end optimizations and advocates evangelizing best practices.
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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.
An invited talk given by Mark Billinghurst on Research Directions for Cross Reality Interfaces. This was given on July 2nd 2024 as part of the 2024 Summer School on Cross Reality in Hagenberg, Austria (July 1st - 7th)
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.
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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.
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:
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- 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.
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3. Importance of Web Performance
Even a few seconds delay is enough to create an unpleasant user experience.
57% of online shoppers will wait 3 seconds or less before abandoning the site.
Google engineers found that users begin to get frustrated with a site after waiting just
400 milliseconds – literally the blink of an eye – for web pages to load.
Source – Aberdeen Group
6. General Level Optimization
1. Minimize HTTP Requests
Most of the time is tied up in downloading all the components in the page:
images, stylesheets, scripts, Flash, etc.
How to minimize HTTP Request?
Combined files are a way to reduce the number of HTTP requests by
combining all scripts and CSS into a single stylesheet and CSS respectively.
CSS Sprites are the preferred method for reducing the number of image
requests.
Image maps combines multiple images to single image.
Browser Cache Usage - 40-60% of daily visitors to your site come in with an
empty cache.
7. 2. Put Stylesheets at the Top
Various research shows that moving stylesheets to the document HEAD makes pages
appear to be loading faster.
The problem with putting stylesheets at the bottom of the document is that it
prohibits progressive rendering and user’s stuck viewing a blank white page.
Placing stylesheets in the HEAD allows the page to render progressively.
Vital for pages with a lot of content and for users on slower Internet connections.
General Level Optimization
8. 3. Minify JavaScript and CSS
Minification reduces response time and the size.
Few popular tools for minifying are:
JSMin
YUI Compressor
Google Closure Compiler
Obfuscation is an alternative optimization.
Both methods achieves fairly the same size reduction (Minification achieved a 21%
size reduction, where 25% for obfuscation), but obfuscation is bit risky with JavaScript.
Should minified in-line JS and CSS as well (5% reduction).
General Level Optimization
9. 4. Avoid CSS Expressions
CSS expressions are a powerful (and dangerous) way to set CSS properties
dynamically.
Supported in IE starting with version 5, but were deprecated starting with IE8.
Adding a counter to the CSS expression allows us to keep track of when and how
often a CSS expression is evaluated.
Solutions
Use one time expression instead of CSS expression.
For Dynamic throughout style property, use Event handler.
background-color: expression( (new Date()).getHours()%2 ? "#B8D4FF" : "#F08A00" );
General Level Optimization
10. 5. Make JavaScript and CSS External
Using external files produces faster pages.
JS and CSS files are cached.
In-lined increases the document’s size.
Many documents could re-use them.
To reduce HTTP requests in the front page:
In-line JavaScript and CSS, but dynamically download the external files after
finished loading.
General Level Optimization
11. 6. Choose <link> over @import
The difference between them is that @import is the CSS mechanism to include a
style sheet and <link> the HTML mechanism. However, browsers handle them
differently, giving <link> a clear advantage in terms of performance.
In IE @import behaves the same as using <link> at the bottom of the page, so it's
best not to use it.
General Level Optimization
12. 7. Put Scripts at Bottom
Browser do not download more than two components in parallel per hostname.
Block parallel downloads across all hostnames.
Block rendering of everything below them in the page.
Never uses document.write.
General Level Optimization
13. 8. Remove Duplicate Scripts
Two of Ten top sites contains duplicated script.
Main factors increase the odds of a script being duplicated in a single web page is
team size and number of scripts.
Hurt performance by creating unnecessary HTTP requests and wasted JavaScript
execution.
Solutions
Implement a script management module in your template system.
The typical way to include a script is to use the SCRIPT tag in your HTML page.
An alternative in PHP would be to create a function called InsertScript.
<script type="text/javascript" src="menu_1.0.17.js"></script>
<?php insertScript("menu.js") ?>
General Level Optimization
14. 9. Optimize Image
Image needs to be optimized before you FTP those images to your web server, after
designer is done with creating the images for your web page.
Key things are
Check the GIFs, whether palette size corresponding to the number of colors in
the image.
Try converting GIFs to PNGs (except for animations).
Run pngcrush (or any other PNG optimizer tool) on all your PNGs.
Run jpegtran on all your JPEGs.
General Level Optimization
15. 10. Optimize CSS Sprites
Arranging the images horizontally (makes the smaller file size).
Combining similar colors in a sprite helps you keep the color count low, ideally under
256 colors so to fit in a PNG8.
Don’t leave big gaps between the images in a sprite.
It makes the user agent requires less memory.
General Level Optimization
11. Keep Components Under 25kb for Mobile Site
iPhone wont cache components > 25K (uncompressed size).
Minification is important because gzip alone may not be sufficient.
16. 12. Don’t Scale Images in HTML
Do not use a bigger image than you need.
If you need
<img width="100" height="100" src="mycat.jpg" alt="My Cat" />
then mycat.jpg should be 100x100px, rather than scale down from 500x500px image
General Level Optimization
17. 13. Make favicon.ico Small and Cacheable
Browser will always request it, better not to respond 404.
• Cookies are sent every time its requested.
• Also interferes with the download sequence in IE.
Solutions
Make it small, preferably under 1K.
Set Expires header when you feel comfortable.
Imagemagick can help you create small favicons.
General Level Optimization
18. 14. Avoid Empty Image src
Image with empty string src attribute occurs more than one will expect.
It appears in two form: –
Straight HTML <img src=" ">
JavaScript var img = new Image();
img.src = "";
Browser makes another request to your server.
Cripple your servers by sending a large amount of unexpected traffic.
Waste server computing cycles.
Possibly corrupt user data.
HTML5 instruct browsers not to make an additional request.
Empty image src can destroy your site.
General Level Optimization
19. 15. Avoid Redirects
Redirects are accomplished using the 301 and 302 status codes.
Redirects slow down the user experience.
Nothing can be rendered
Round-trip request
Add Expires headers to cache redirects.
Wasteful Redirect, i.e. when a trailing slash (/) is missing from a URL that should
otherwise have one.
This is fixed in Apache by using Alias or mod_rewrite, or the DirectorySlash directive
if you're using Apache handlers.
HTTP/1.1 301 Moved Permanently
Location: http://example.com/newuri
Content-Type: text/html
General Level Optimization
20. 16. Make Ajax Cacheable
Expires or Cache-Control header.
Adding a timestamp to the URL – &t=1190241612.
When it has been modified, send with a new timestamp.
The most important way to improve the performance of Ajax is to make the
responses cacheable
17. Avoid 404’s
Ineffectual response (i.e. 404 Not Found) is totally unnecessary and will slow down
the user experience without any benefit.
General Level Optimization
21. 18. Reduce Cookie Size
HTTP cookies are used for a variety of reasons such as authentication and
personalization.
It's important to keep the size of cookies as low as possible to minimize the impact
on the user's response time.
Eliminate unnecessary cookies.
Keep cookie sizes small.
Setting cookies at the appropriate domain level.
Set an Expires date appropriately. An earlier Expires date or none removes the cookie
sooner, improving the user response time
General Level Optimization
23. 1. Implement Content Delivery Network (CDN)
The users proximity has an impact on response times.
Solutions
Use a CDN: Akamai Technologies, EdgeCast, Amazon CloudFront, or level3.
Distribute your static content before distributing your dynamic content.
At Yahoo, using a CDN improved response times >= 20%.
Server Level Optimization
24. 2. Reduce DNS Lookups
Domain Name System (DNS) maps hostnames to IP addresses.
On average, takes 20-120 Milliseconds.
IE caches :
DnsCacheTimeout : 30 minutes
Firefox :
network.dnsCacheExpiration : 1 minute
(Fasterfox changes this to 1 hour)
Reducing hostnames reduces the DNS lookups, But it reduces parallel downloads.
Better to split these components across at least two but no more than four
hostnames.
Server Level Optimization
25. 3. Split Components Across Domains
Splitting components allows you to maximize parallel downloads.
Make sure you're using not more than 2-4 domains because of the DNS lookup
penalty.
For Instance, you can host your HTML and dynamic content on www.example.org
and split static components between static1.example.org and static2.example.org.
Server Level Optimization
26. 4. Use Cookie-free Domains for Components
Create www site and sub-domain.
that sub-domain is cookie-free.
Buy a whole new domain if already set on domain without www.
Yahoo! uses yimg.com,
YouTube uses ytimg.com,
Amazon uses images-amazon.com and so on.
Some proxies might refuse to cache the components that are requested with
cookies.
Server Level Optimization
27. 5. Add Expires or Cache-Control Header
Use "Never expire" policy for static components by setting far future Expires
header.
For dynamic components, use an appropriate Cache-Control header to help the
browser with conditional requests.
Avoid unnecessary HTTP requests on subsequent page view after the first visit.
Server Level Optimization
28. 6. Gzip Components
Gzip is effective compression method compared to deflate.
Key Features are
Reduces response times.
The response size ~ 70% reduction.
90%+ of browsers support gzip.
Compress any text responses.
Image and PDF files SHOULD NOT be gzipped.
In Apache, the module configuring gzip depends on your version: Apache 1.3 uses
mod_gzip while Apache 2.x uses mod_deflate.
Server Level Optimization
30. General Guidelines
Keep the Joomla! Version updated.
Choose extensions wisely.
Deactivate unused extensions, upgrade used.
Simplify your templates as much as possible.
Use Cache.
Optimize the MYSQL Statements.
Use limited number of Records in SQL.
Enhance Joomla! Web
31. 1. Flush Buffer Early
Normally, it may take 200 to 500ms for the backend server to stitch together the
HTML page, once a user request a page.
The browser remains idle until data is received.
In PHP flush() function allows you to send your partially ready HTML response to
the browser so that the browser can start fetching components while your backend
is busy with the rest of the HTML page.
The benefit is mainly seen on busy backend or light frontend.
Flushing after the HEAD is optimal, as it allows to include any JS and CSS.
Example
Technology Level Optimization
... <!-- css, js -->
</head>
<?php flush(); ?>
<body>
... <!-- content -->