This document summarizes upcoming improvements and new features in web browsers, including Firefox 3.1, Safari 4, Internet Explorer 8, Opera 10, and Google Chrome. Many of the browsers are focusing on better JavaScript performance through new engines like TraceMonkey and V8. New features include process per tab, postMessage for cross-domain communication, HTML5 drag and drop, and the Canvas element for offloading rendering to the client. Overall the browsers are aiming to improve speed, compatibility, and the user experience through these new features and technologies.
The document discusses various security vulnerabilities in Ajax applications including CSRF, login CSRF, JavaScript hijacking, XSS, and history stealing. It provides examples of how these attacks can be carried out and emphasizes the importance of validating and sanitizing user input to prevent scripts from being executed maliciously on a site. The document also recommends techniques for protecting against these attacks, such as using authentication tokens and disabling client-side script evaluation for untrusted sources.
연구자 및 교육자를 위한 계산 및 분��� 플랫폼 설계 - PyCon KR 2015Jeongkyu Shin
This document discusses various Python and web development topics. It covers Python programming best practices and libraries like asyncio and NumPy. It also discusses front-end frameworks like Polymer and Electron. Additional sections provide overviews of containerization with Docker, message queues like ZeroMQ, log aggregation with Logstash, and cloud hosting options.
The document discusses socket applications and real-time communication. It describes common examples like chat, live feeds, and games. It then explains the typical solution of using AJAX requests and the problems with that approach. The proposed solution is to use a multi-threaded model with asynchronous I/O and the reactor pattern to process requests while waiting for network responses. Various tools for implementing this pattern in Ruby and JavaScript are also mentioned, including Pusher, Socket.IO, and SocketStream.
Building a real life application in node jsfakedarren
This document provides an overview of building a real-life application in Node.js. It discusses selecting a database like MongoDB, using Express for routing and templating, and Mongoose for modeling and interacting with the database. Key components covered include setting up routing, views, and static assets in Express, performing CRUD operations in MongoDB via Mongoose, and using templating engines like Jade or EJS. The overall goal is to build a basic content management system to demonstrate integrating these technologies.
Play Framework and Ruby on Rails are web application frameworks that help developers build web applications. Both frameworks provide tools and libraries for common tasks like routing, database access, templates and more. Some key similarities include using MVC patterns, supporting SQL/NoSQL databases via libraries, and including tools for unit testing and deployment. Some differences are Play uses Scala and Java while Rails uses Ruby, and they have different project structures and ways of handling assets, templates and dependencies. Both aim to help developers build web applications faster with their features and ecosystem of supporting libraries.
The way JavaScript is standardized and improved is changing this year. Learning how will help you understand why transpilers have become so popular, and why we will likely be using them for a long time.
Ember itself will need to adapt to changes in JavaScript, and we will take a look at how the existing object model might be migrated to a pure EcmaScript solution.
Single Page Web Applications with CoffeeScript, Backbone and JasminePaulo Ragonha
This document discusses using CoffeeScript, Backbone.js, and Jasmine BDD to build single page web applications. It begins by explaining why CoffeeScript is useful for cleaning up JavaScript code and avoiding errors. It then discusses how Backbone.js provides structure for single page apps by defining models, collections, views and routers. It notes that Backbone works well with CoffeeScript. Finally, it mentions that Jasmine BDD can be used for writing professional tests.
Given at YAPC::EU 2012
Dancer + WebSocket + AnyEvent + Twiggy
This in *not* a talk about doing a hello world in Dancer, as there are plenty of it. This is a real-life example of using Dancer to address a problem in an elegant and powerful way
At $job, we have cpan mirrors. We want them to stay a bit behind the real CPAN for stability, but we have a tool to update modules from the real CPAN to our mirrors. Cool.
I wanted to have a web interface to trigger it, and monitor the injection. This problem is not a typical one (blog, wiki, CRUD, etc). Here we have a long running operation that shall happen only one at a time, that generates logs to be displayed, with states that need keeping. In this regard, it's interesting to see how Dancer is versatile enough to address these situations with ease.
This talk details how I did that, the technology I used, and the full source code (which is quite short). I used Dancer + WebSocket + AnyEvent + Twiggy + some other stuff.
This talk doesn't require any particular knowledge beyond basic Perl, and very basic web server understanding.
Building Realtime Apps with Ember.js and WebSocketsBen Limmer
This talk discusses how AJAX differs from WebSockets and how the technology can be used to implement rich real-time experiences. It also produces a live demo using EmberJS.
This document discusses integrating Django, Django Rest Framework, React, Redux, and related technologies. It recommends using Webpack to bundle JavaScript assets. It provides code examples for defining React components, Redux reducers, and connecting a React frontend to a Django Rest Framework backend via API calls. The document emphasizes building reusable presentational and container components, and wiring actions and reducers to the backend via Redux middleware like redux-promise.
A bit of history, frustration-driven development, and why and how we started looking into Puppet at Opera Software. What we're doing, successes, pain points and what we're going to do with Puppet and Config Management next.
The document describes the author's experience deploying and configuring Varnish caching at Opera over many years. Some key points discussed include:
- Initial deployment in 2009 caching static assets for My Opera, which grew to serve 15% of requests
- Troubleshooting issues like session mixing and unauthorized access
- Implementing caching for dynamic pages like the front page while respecting cookies and languages
- Decentralizing caching to multiple data centers for lower latency globally
- Generating and caching thumbnails on-the-fly to handle frequent design changes
- Developing a more generic "shields-up" configuration to cache unpopular content securely
- Ongoing work caching APIs and content on other
This document outlines Ugo Cei's presentation "Ruby for Java Programmers". The presentation will cover how to integrate Ruby and Java code, including using bridges like JRuby, XML-RPC, and SOAP. It will also demonstrate sample code for calling Java from Ruby and vice versa. The goal is to help Java programmers learn how Ruby can be used alongside or instead of Java in certain scenarios.
This document discusses various tools and techniques for testing JavaScript code, including:
1. Unit testing frameworks like Test.Unit that allow writing tests with assertions and automatically running tests.
2. Using Rake tasks to automate running tests and controlling browsers.
3. Behavior-driven development (BDD) techniques like RSpec that allow writing tests as should/is statements directly on objects.
4. Debugging tools like Firebug, Safari Web Inspector, and Microsoft Script Debugger for troubleshooting JavaScript issues.
Advanced AV Foundation (CocoaConf, Aug '11)Chris Adamson
The iOS version of iMovie uses the AV Foundation framework, and indications are that Final Cut Pro X will be using the Mac OS X version of AVF. And if AV Foundation is powerful enough to provide the core functionality of Final Cut, it must have some great stuff going on, right? In this session, we'll dig into the more powerful (and more challenging) APIs in AV Foundation, including reading and writing raw samples, performing live processing of incoming data at capture time, and advanced editing features like mixing audio and video tracks and adding Core Animation-based titles.
Transients are good for you - WordCamp London 2016Boiteaweb
This document discusses WordPress transients, which provide a simple way to temporarily store cached data in the database by giving it a custom name and expiration time. Transients offer a performance gain by acting as a cache system that stores content like recent posts, comments, or data from external requests for a set time period before expiring. The document covers what transients are, why to use them, examples of good use cases, and how to implement them using the core Transient API functions like set_transient(), get_transient(), and delete_transient().
High Performance JavaScript - WebDirections USA 2010Nicholas Zakas
This document summarizes Nicholas C. Zakas' presentation on high performance JavaScript. It discusses how the browser UI thread handles both UI updates and JavaScript execution sequentially. Long running JavaScript can cause unresponsive UIs. Techniques to ensure responsive UIs include limiting JavaScript execution time, using timers or web workers to break up processing, reducing repaints and reflows, and grouping style changes. Hardware acceleration and optimizing JavaScript engines have improved performance but responsive UIs still require discipline.
Performance, Games, and Distributed Testing in JavaScriptjeresig
This document discusses various techniques for measuring and optimizing JavaScript performance, including profiling tools in browsers like Firebug and Safari. It also addresses challenges in building multiplayer JavaScript games, such as latency issues, and proposes solutions like combining elements of strategy, intelligence and accuracy. The document concludes by covering distributed and automated testing techniques like TestSwarm that can help address challenges of testing JavaScript across many browsers and platforms.
The document discusses optimizing performance for Ajax applications. It recommends:
- Keeping client-side code light by only requesting necessary data from the server via JSON messages.
- Avoiding unnecessary DOM touches and reflows which are computationally expensive.
- Measuring performance before and after optimizations to validate improvements rather than relying on intuition.
- Optimizing algorithms and avoiding unnecessary work rather than prematurely optimizing without evidence of need.
Douglas Crockford - Programming Style and Your BrainWeb Directions
Computer programs are the most complicated things that humans make. They must be perfect, which is hard for us because humans are not perfect. Programming is thought to be a “head” activity, but there is a lot of “gut” involved. Indeed, it may be the gut that gives us the insight necessary for solving hard problems. But gut messes us up when it come to matters of style. The systems in our brains that make us vulnerable to advertising and propaganda also influence our programming styles. This talk looks systematically at the development of a programming style that specifically improves the reliability of programs. The examples are given in JavaScript, a language with an uncommonly large number of bad parts, but the principles are applicable to all programming languages.
- The original vision of the World Wide Web was as a hyperlinked document retrieval system, not for presentation, sessions, or interactivity. If it had stayed true to this vision, modern sites like Yahoo would not exist.
- Browser wars in the 1990s led to proprietary technologies that frustrated developers. The introduction of JavaScript in 1995 allowed for dynamic and interactive web pages.
- By the 2000s, Microsoft's Internet Explorer dominated the browser market, bringing some stability through standards like DOM and DHTML. However, cross-browser differences still posed challenges for developers.
The document discusses the origins and development of JSON (JavaScript Object Notation). It describes how Douglas Crockford discovered JSON in 2001 and published the first JSON specification in 2002. It outlines some of the key events in the early adoption of JSON, including its use for browser/server communication and as an alternative to XML.
This document provides 10 tips for developing HTML5 games for both desktop and mobile platforms. Some key points covered include using the <canvas> tag for games, touch events for mobile, dirty rectangles to improve framerate on mobile, matching button sizes to fingers, using localStorage to save game data, and tools for debugging mobile games. More details on these techniques and HTML5 game development can be found at the listed web addresses.
<p>Security design is an important, but often neglected, component of system design. In this session, Douglas Crockford, creator of Javascript Object Notation, will outline the security issues that must be considered in the architecture of Ajax applications.</p>
<p>The design of the browser did not anticipate the needs of multiparty applications. The browser’s security model frustrates useful activities and allows some very dangerous activities. This talk will look at the small set of options before us that will determine the future of the Web.<br />
During this session, attendees will:</p>
<ul>
<li>Learn why effective security is an inherent feature of good design;</li>
<li>Experience a real-time demo of a Ajax client/server system based on sound security principles</li>
<li>See how to apply secure design to rich web applications.</li>
</ul>
JSON is a lightweight data-interchange format that is easy for humans to read and write and for machines to parse and generate. It is built on two structures: a collection of name/value pairs and an ordered list of values. JSON is widely used to transmit data between a server and web application, and has largely become the default format for asynchronous browser/server communication. While easy for machines to parse and generate, it is also readable by humans.
This document discusses object-oriented programming concepts in JavaScript, including encapsulation, inheritance, and polymorphism. It provides examples of implementing encapsulation with private and public properties and methods. Inheritance is demonstrated through extending classes. Polymorphism is shown through functions that can take on different meanings based on context. JSON and closures are also mentioned.
The document discusses different approaches to object-oriented programming in JavaScript, including classical and prototypal inheritance, constructor functions, and the prototype property. It explains how prototypal inheritance works by linking objects together through their internal prototype properties. Constructor functions and the new operator allow simulating classical inheritance by establishing prototype links. Various design patterns are also covered, such as public/privileged methods, singletons, modules, and parasitic inheritance.
\n\nThe document discusses scalable JavaScript application architecture. It advocates for a modular approach where each component (module) has a limited, well-defined purpose and interface. Modules are loosely coupled by communicating through a central sandbox interface rather than directly referencing each other. The core application manages modules by registering, starting, and stopping them. It also handles errors and enables extension points. This architecture aims to build flexible, maintainable applications that can evolve over time.
The document discusses the benefits of exercise for both physical and mental health. Regular exercise can improve cardiovascular health, reduce stress and anxiety, boost mood, and enhance cognitive function. Staying physically active for at least 30 minutes each day is recommended for significant health benefits.
Nicholas C. Zakas discusses common JavaScript performance issues and recommendations to address them. He covers scope management, data access, loops, and DOM manipulation. The key points are to minimize scope chain lookups, store frequently accessed data in local variables, optimize loops, avoid reflows from DOM changes, and leverage modern browser optimizations. Overall, the talk provides practical tips to speed up JavaScript code by addressing issues related to scope, data access patterns, loops, and DOM interactions.
The document discusses performance improvements in upcoming browsers. It covers new browsers like Firefox 3.1, Safari 4, Internet Explorer 8, Opera 10, and Google Chrome. These browsers will have better JavaScript engines and take advantage of new technologies like process per tab, native JSON support, and the canvas element to improve performance. Many JavaScript and CSS techniques are also described that can enhance performance by offloading work to the browser instead of through JavaScript libraries.
The presentation that I gave at Future of Web Apps, London, October 3, 2007. More information here:
http://ejohn.org/blog/future-of-firefox-and-javascript/
This document summarizes jQuery, a JavaScript library, and its features. It discusses jQuery's selector engine, DOM manipulation abilities, and browser compatibility sniffing. It also describes jQuery UI, a plugin library that adds interactive UI elements like drag and drop. The document outlines jQuery's large plugin ecosystem and testing framework. It concludes with information on profiling jQuery applications for performance optimization.
jQuery is an open source JavaScript library that simplifies HTML and JavaScript interaction. It uses CSS to layer functionality and has a quick, terse syntax. jQuery selects elements and allows something to be done with them, like adding a class. It has a large plugin ecosystem managed through a plugin tracker. jQuery UI provides cross-browser user interface components. The library is fully documented, has a great community, many plugins, and small size. It works in all major browsers and is used by many large companies and projects.
This document summarizes new features coming in major browsers, including Firefox 3.5, Safari 4, Internet Explorer 9, Opera 10, and Google Chrome 2. The browsers will have better JavaScript performance due to advanced engines like TraceMonkey, SquirrelFish, and V8. New features include process per tab, postMessage for cross-domain communication, getElementsByClassName, querySelectorAll, and HTML5 features like local SQL storage, JSON support, and canvas drawing.
- The document is a presentation on Ajax given by Alex Russell that covers what Ajax is, how it works, when it should and should not be used, tools for Ajax development, debugging techniques, and the future of Ajax and the open web.
- It includes examples of building an auto-save feature with Ajax using plain JavaScript, Prototype, and Dojo and discusses language features of JavaScript.
- The presentation aims to provide enough knowledge and code examples to get started with Ajax development while addressing open web standards and browser compatibility.
Simon Willison gave a presentation on Comet, a technique for enabling live data updates in web applications. Comet allows a web server to push events to connected browsers in real-time. It has faced many technical challenges due to browser limitations. Key techniques discussed include streaming, long polling, and the Bayeaux protocol which provides a common way for Comet clients and servers to communicate. The presentation showed how to easily build a basic Comet application using Jetty and Dojo in just a few lines of code.
The document discusses Google's work on HTML5 and advancing web applications capabilities. It outlines how browsers and web technologies have evolved over time, from JavaScript in 1995 to the rise of AJAX in the mid-2000s. It then lists new capabilities web applications need like video playback, geolocation, offline support. Google's goal is to empower web apps to do what native apps can through new HTML5 features in Chrome like canvas, local storage, web workers and more. The document provides examples and demos of various HTML5 features and outlines Google's ongoing work to further web standards.
The document summarizes a talk on future trends in web development over the next 5 years. It discusses how technologies like Silverlight and AIR failed to gain traction while open standards and browsers remain important. The talk covered topics like XHTML 2.0 and HTML5, CSS3, ECMAScript 4, CouchDB and Comet. It provided examples of new features in these technologies and their potential impact on web development. The talk concluded with questions from the audience.
Jazz up your JavaScript: Unobtrusive scripting with JavaScript librariesSimon Willison
This document discusses using JavaScript libraries to write unobtrusive scripts. It begins with a brief history of JavaScript development and introduces concepts like unobtrusive scripting and progressive enhancement. It then provides examples of basic unobtrusive scripts and discusses challenges like cross-browser event handling. The bulk of the document focuses on JavaScript libraries and their benefits, listing common library features and some of the most popular libraries like jQuery. It concludes with a specific example using Yahoo's YUI library to add AJAX functionality to a login form.
This document discusses wxPerl, which provides bindings for the wxWidgets GUI toolkit to allow building graphical user interfaces in Perl that are cross-platform. It covers why desktop apps are still useful, why Perl is a good choice, an overview of the wxPerl distribution and architecture, techniques for cross-platform development such as version control and automation, challenges of installation on different platforms, ideas for "Perlinizing" or improving the wxPerl modules, testing approaches, and packaging/deployment strategies.
How we use Varnish at Opera Software, from the beginning (2009) to now.
Presentation hold for the 5th Varnish Users Group meeting (VUG5) held in Paris on March 22nd 2012.
This document provides an overview of popular JavaScript libraries including Dojo Toolkit, YUI, Prototype, and jQuery. It discusses problems they aim to solve like cross-browser inconsistencies. Key features of each library are mentioned like Dojo's widgets, YUI's controls, Prototype's Ruby-like syntax, and jQuery's chaining and node selection. The document also covers ideas from the libraries like progressive enhancement, animation APIs, and leveraging hosting on CDNs.
This document discusses how Docker can be used to improve the Java development environment. It outlines problems with traditional development environments like long setup times and differences between local and production environments. Docker Toolbox allows running Docker on Windows and Macs. Examples show setting up multiple apps with different stacks using Docker Compose. Use cases demonstrated include debugging, continuous deployment from IDEs, integration testing, and reproducing production issues. Best practices recommend using Docker Machine and volumes. The overall message is that Docker can make the development environment more consistent with production.
Presentation about the features of JavaFX. See how to use video, different deployment types, JavaScript integration, annimations and more. Demo's not included.
Node.js is an asynchronous event-driven JavaScript runtime that allows JavaScript to be used on the server-side. It uses a non-blocking I/O model that makes it suitable for real-time web applications. WebSockets provide a standardized way for the browser and server to establish two-way communication. However, not all browsers support WebSockets yet. Socket.io addresses this by providing a WebSocket-like experience across all browsers through fallbacks like long-polling. It allows real-time applications to be developed more easily.
Castles in the Cloud: Developing with Google App Enginecatherinewall
App Engine offers developers the opportunity to deploy systems on Google's robust and scalable server-farms. App Engine provides a higher-level platform than Amazon Web Services,with automated scaling and true pay-per-use billing.
The poster-child of App Engine, "BuddyPoke", has gained over thirty million users.
With App Engine, Google has released the first public API to BigTable, its planetary datastore, which performs successfully at petabyte scale across diverse applications from search to finance to Google Earth.
This presentation will cover App Engine's features and limitations, and how to exploit this new and evolving platform.
Similar to Performance Improvements in Browsers (20)
John Resig discusses coding every day in an August 2016 article. He started coding daily in November 2013 and has continued the practice since. While coding daily works for him by making it easier to remember projects, relieving anxiety, and allowing non-weekend work, he acknowledges it may not be necessary for others. Resig emphasizes that having passion for coding and setting goals are critical for learning and success, more so than daily coding itself.
John Resig discusses four problems that digital librarians face: 1) searching by image without exact matches, 2) disagreements on names and titles, 3) poor quality images, and 4) educating users. He provides examples and potential solutions for each problem, including image search tools, handling alternate names and formats, improving images through cropping and computer vision, and using question/answer interfaces to educate users. Resig advocates for open source tools and collaborative solutions to advance access to knowledge.
Neo4j is a graph database that represents data as nodes and relationships. Nodes are JSON documents that can have labels. Relationships are JSON documents that connect nodes and can have labels. Cypher is the query language for Neo4j that allows users to match patterns in the graph, return results, import and export data, and perform other operations like finding missing connections between nodes.
Computer Vision as Art Historical Investigationjeresig
This document summarizes a symposium honoring James Watrous that included discussions on using computer vision in art historical investigation and image similarity analysis to study woodblock prints. It describes how image analysis can help identify similar images across different collections and merging photo archives to create a large international image database for researchers.
This document summarizes John Resig's process for hacking art history databases for fun and profit. It describes scraping woodblock print data from websites, processing the data with tools like Node.js and MongoDB, and building a searchable online database called Ukiyo-e.org. It also discusses using image analysis and similarity search to validate print data and identify copies. The goal is to aid the study of woodblock prints by building open tools and data.
1) Khan Academy teaches programming concepts to over 1.3 million students per month online.
2) They have developed a real-time JavaScript editor that uses static analysis to build challenges and allow coding on tablets and phones.
3) It runs code through analysis tools to provide error messages and hints, then uses abstract syntax trees and structured testing to check for specific functions, arguments, and program structures.
Computer vision techniques can be applied to art history in both supervised and unsupervised ways. Unsupervised methods like using image similarity tools to compare entire images or image portions can help find similar or matching images without labeling data. Supervised methods like object detection or image categorization require large labeled training datasets but can provide more precise results, identifying specific parts or categories within images. Both approaches require significant computing resources, with supervised methods needing thousands of training images and days of processing time.
The document summarizes research using image analysis to match photographs across multiple art archives, including the Frick Art Reference Library Photoarchive and the Frederico Zeri Foundation archive. Running image matching software on over 1.2 million Frick photos and 290,000 Zeri photos revealed new connections within and between the archives. Combining the archives through automated matching discovered over 1,000 new artwork connections that had not previously been found by human researchers. The analysis demonstrates the potential of merging photo archives through computational methods to reveal new relationships and insights.
EmpireJS: Hacking Art with Node js and Image Analysisjeresig
The document discusses using computer vision and Node.js to analyze Japanese artworks like woodblock prints. It describes collecting data on prints through web scraping, processing the data with tools like PhantomJS, and using image analysis to aid studies of prints by correcting metadata and matching images. The goal is to build a website that facilitates research on ukiyo-e prints through techniques like similarity search and automated data cleaning.
This document discusses how computer vision techniques can be applied to art history. It provides an overview of different computer vision approaches such as optical character recognition (OCR), face recognition, and image similarity/categorization. Unsupervised techniques like OCR and image similarity require little labeling of data but may not provide as interesting results. Supervised techniques can more precisely locate parts of images or categorize images but require large labeled datasets. The document recommends several free and open-source computer vision libraries and tools that can be used to explore applying these techniques to art history, along with some caveats about training data requirements.
The document discusses several popular JavaScript libraries including Dojo, Prototype, jQuery, Mochikit, and Yahoo UI. It compares the libraries based on their focus, DOM support, events/effects handling, documentation, community, file size, and popularity. The libraries provide a variety of features like DOM manipulation, Ajax capabilities, and animations to make JavaScript development easier.
This document summarizes jQuery, an open source JavaScript library. It simplifies HTML and JavaScript interaction by allowing developers to select elements, handle events, perform animations and AJAX calls with simple and concise code. The document highlights key features like DOM manipulation, events, effects and plugins. It also discusses jQuery's community, adoption by major sites, and future plans.
This document discusses jQuery and web standards. It summarizes jQuery's goal of hiding browser compatibility issues while providing a simple API. It also discusses jQuery's success competing with other JavaScript libraries. The document outlines several specifications that are important to jQuery, with the DOM being the most significant. It then lists several standards and features that jQuery has used successfully. The majority of the document proposes additional standards and browser features that would be useful for jQuery and JavaScript libraries going forward, including better DOM manipulation APIs and event handling capabilities.
This document summarizes the key aspects of jQuery's open source process that contributed to its early success. In the first month, new users were able to get started quickly by exploring the simple API through tutorials. An active community provided support through forums, IRC, blogs and Twitter. Documentation and examples helped users learn and expand their skills. Over the first year, as users built more applications with jQuery, its easy to use but powerful API led to increased adoption. The open development process also engaged users and helped the project grow.
jQuery Open Source Process (Knight Foundation 2011)jeresig
This document summarizes the key aspects of jQuery's open source process that contributed to its early success. It discusses how jQuery provided clear documentation, tutorials, and community resources to help users learn. It emphasizes keeping the API simple and focused on usability. It also highlights the importance of monitoring community feedback and responding to user questions. Maintaining an open development process helped users continue growing with jQuery over time.
jQuery Mobile aims to fill the gap in mobile web development by providing a framework that works across all major mobile platforms and browsers without sacrificing the user experience. It is a two-phase project: phase one focuses on making jQuery core functionality work across all popular mobile browsers through testing and bug fixes; phase two introduces jQuery Mobile, a framework for building mobile websites and applications with widgets, layouts, and a progressive enhancement approach to ensure broad compatibility.
This document discusses best practices for supporting users of open source projects based on jQuery's experience. It emphasizes providing documentation, tutorials, community support and an open development process to help users learn and succeed with the tool from their first day of use through becoming long-term contributors. Key aspects include simplifying the first experience, answering questions, addressing all skill levels, and enabling extensibility to keep users engaged over time.
This document discusses holistic performance analysis and optimization in JavaScript. It emphasizes the importance of proving performance changes with benchmarks, considering the full browser stack and real-world use cases, maintaining clean code, prioritizing cross-browser compatibility, and clearly communicating results. Key tools mentioned include JSPerf for benchmarking, BrowserScope for hosting performance data, and Google Code Search for understanding real-world usage of APIs. The document advocates optimizing against past performance rather than competitors.
jQuery is an open source JavaScript library that simplifies HTML and JavaScript interaction. It has a small file size, is fully documented, and supported across many browsers. jQuery allows developers to select elements, perform actions on them such as effects, events, DOM manipulation, and AJAX requests, using its simple and concise syntax.
This document discusses jQuery plugins, including how to create and use them. It provides examples of existing plugins for widgets, drag and drop, forms, and more. The document demonstrates how to build a wizard functionality using plugins for blocking elements, submitting ajax forms, and tabs.
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
BT & Neo4j: Knowledge Graphs for Critical Enterprise Systems.pptx.pdfNeo4j
Presented at Gartner Data & Analytics, London Maty 2024. BT Group has used the Neo4j Graph Database to enable impressive digital transformation programs over the last 6 years. By re-imagining their operational support systems to adopt self-serve and data lead principles they have substantially reduced the number of applications and complexity of their operations. The result has been a substantial reduction in risk and costs while improving time to value, innovation, and process automation. Join this session to hear their story, the lessons they learned along the way and how their future innovation plans include the exploration of uses of EKG + Generative AI.
Mitigating the Impact of State Management in Cloud Stream Processing SystemsScyllaDB
Stream processing is a crucial component of modern data infrastructure, but constructing an efficient and scalable stream processing system can be challenging. Decoupling compute and storage architecture has emerged as an effective solution to these challenges, but it can introduce high latency issues, especially when dealing with complex continuous queries that necessitate managing extra-large internal states.
In this talk, we focus on addressing the high latency issues associated with S3 storage in stream processing systems that employ a decoupled compute and storage architecture. We delve into the root causes of latency in this context and explore various techniques to minimize the impact of S3 latency on stream processing performance. Our proposed approach is to implement a tiered storage mechanism that leverages a blend of high-performance and low-cost storage tiers to reduce data movement between the compute and storage layers while maintaining efficient processing.
Throughout the talk, we will present experimental results that demonstrate the effectiveness of our approach in mitigating the impact of S3 latency on stream processing. By the end of the talk, attendees will have gained insights into how to optimize their stream processing systems for reduced latency and improved cost-efficiency.
INDIAN AIR FORCE FIGHTER PLANES LIST.pdfjackson110191
These fighter aircraft have uses outside of traditional combat situations. They are essential in defending India's territorial integrity, averting dangers, and delivering aid to those in need during natural calamities. Additionally, the IAF improves its interoperability and fortifies international military alliances by working together and conducting joint exercises with other air forces.
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.
Support en anglais diffusé lors de l'événement 100% IA organisé dans les locaux parisiens d'Iguane Solutions, le mardi 2 juillet 2024 :
- Présentation de notre plateforme IA plug and play : ses fonctionnalités avancées, telles que son interface utilisateur intuitive, son copilot puissant et des outils de monitoring performants.
- REX client : Cyril Janssens, CTO d’ easybourse, partage son expérience d’utilisation de notre plateforme IA plug & play.
7 Most Powerful Solar Storms in the History of Earth.pdfEnterprise Wired
Solar Storms (Geo Magnetic Storms) are the motion of accelerated charged particles in the solar environment with high velocities due to the coronal mass ejection (CME).
Best Practices for Effectively Running dbt in Airflow.pdfTatiana Al-Chueyr
As a popular open-source library for analytics engineering, dbt is often used in combination with Airflow. Orchestrating and executing dbt models as DAGs ensures an additional layer of control over tasks, observability, and provides a reliable, scalable environment to run dbt models.
This webinar will cover a step-by-step guide to Cosmos, an open source package from Astronomer that helps you easily run your dbt Core projects as Airflow DAGs and Task Groups, all with just a few lines of code. We’ll walk through:
- Standard ways of running dbt (and when to utilize other methods)
- How Cosmos can be used to run and visualize your dbt projects in Airflow
- Common challenges and how to address them, including performance, dependency conflicts, and more
- How running dbt projects in Airflow helps with cost optimization
Webinar given on 9 July 2024
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.
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.
Quality Patents: Patents That Stand the Test of TimeAurora Consulting
Is your patent a vanity piece of paper for your office wall? Or is it a reliable, defendable, assertable, property right? The difference is often quality.
Is your patent simply a transactional cost and a large pile of legal bills for your startup? Or is it a leverageable asset worthy of attracting precious investment dollars, worth its cost in multiples of valuation? The difference is often quality.
Is your patent application only good enough to get through the examination process? Or has it been crafted to stand the tests of time and varied audiences if you later need to assert that document against an infringer, find yourself litigating with it in an Article 3 Court at the hands of a judge and jury, God forbid, end up having to defend its validity at the PTAB, or even needing to use it to block pirated imports at the International Trade Commission? The difference is often quality.
Quality will be our focus for a good chunk of the remainder of this season. What goes into a quality patent, and where possible, how do you get it without breaking the bank?
** Episode Overview **
In this first episode of our quality series, Kristen Hansen and the panel discuss:
⦿ What do we mean when we say patent quality?
⦿ Why is patent quality important?
⦿ How to balance quality and budget
⦿ The importance of searching, continuations, and draftsperson domain expertise
⦿ Very practical tips, tricks, examples, and Kristen’s Musts for drafting quality applications
https://www.aurorapatents.com/patently-strategic-podcast.html
Fluttercon 2024: Showing that you care about security - OpenSSF Scorecards fo...Chris Swan
Have you noticed the OpenSSF Scorecard badges on the official Dart and Flutter repos? It's Google's way of showing that they care about security. Practices such as pinning dependencies, branch protection, required reviews, continuous integration tests etc. are measured to provide a score and accompanying badge.
You can do the same for your projects, and this presentation will show you how, with an emphasis on the unique challenges that come up when working with Dart and Flutter.
The session will provide a walkthrough of the steps involved in securing a first repository, and then what it takes to repeat that process across an organization with multiple repos. It will also look at the ongoing maintenance involved once scorecards have been implemented, and how aspects of that maintenance can be better automated to minimize toil.
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.
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.
Quantum Communications Q&A with Gemini LLM. These are based on Shannon's Noisy channel Theorem and offers how the classical theory applies to the quantum world.
2. About Me
Work for the Mozilla Corporation (Firefox!)
✦
✦ Do a lot of JavaScript performance analysis
✦ Dromaeo.com is my performance test suite
✦ Tests the performance of JavaScript engines
✦ Tests the performance of browser DOM
Creator of the jQuery JavaScript Library
✦
✦ http://jquery.com/
✦ Used by Microsoft, Google, Adobe, Nokia,
IBM, Intel, CBS News, NBC, etc.
3. Upcoming Browsers
The browsers:
✦
✦ Firefox 3.1
✦ Safari 4
✦ Internet Explorer 8
✦ Opera 10
✦ Google Chrome
Defining characteristics:
✦
✦ Better performance
✦ Advanced JavaScript engines
4. Firefox 3.1
Set to be released Spring 2009
✦
Goals:
✦
✦ Performance improvements
✦ Video and Audio tags
✦ Private browsing
Beta 2 just released
✦
http://developer.mozilla.org/En/Firefox_3.1_for_developers
✦
5. Safari 4
Released in conjunction with OS X 10.6
✦
Features:
✦
✦ Performance improvements
✦ Desktop Apps
✦ ACID 3 compliance
✦ Revamped dev tools
Preview seeded to developers
✦
http://webkit.org/blog/
✦
6. Internet Explorer 8
Released early 2009
✦
Features:
✦
✦ Backwards compatibility with IE 7
✦ Web Clips (trim out a part of a page and
place on desktop)
✦ Process per tab
RC1 recently
✦
released
http://www.microsoft.com/
✦
windows/internet-explorer/
beta/readiness/new-features.aspx
7. Opera 10
Unspecified release schedule (2009?)
✦
Features:
✦
✦ ACID 3 compliance
✦ Video and Audio tags
Opera 9.6 recently released
✦
http://labs.opera.com/
✦
8. Google Chrome
Chrome 1.0 September 2008
✦
Features:
✦
✦ Private browsing
✦ Process per tab
Chrome 2.0 upcoming
✦
http://googlechromereleases.blogspot.com/
✦
9. Process Per Tab
Most browsers have a single process
✦
✦ Share memory, resources
✦ Pages rendered using threads
IE 8 and Chrome split tabs into individual
✦
processes
What does this change?
✦
✦ Pages can do more processing
✦ (Not block the UI or other tabs)
✦ Tabs consume more memory
10. Process Per Tab
Examples of changes, in Chrome.
✦
Timer speed is what you set it to.
✦
✦ Browsers cap the speed to 10ms.
✦ setInterval(fn, 1);
Can do more non-stop processing, without
✦
warning:
while (true) {}
Chrome has a process manager (like the
✦
OS process manager - see CPU, Memory)
11. JavaScript Engines
New wave of engines:
✦
✦ Firefox: TraceMonkey
✦ Safari: SquirrelFish (Extreme)
✦ Chrome: V8
Continually leap-frogging each other
✦
12. Common Areas
Virtual Machines
✦
✦ Optimized to run a JavaScript-specific
bytecode
Shaping
✦
✦ Determine if two objects are similar
✦ Optimize behavior based upon that
✦ “Walks like a duck, quacks like a duck”
✦ if ( obj.walks && obj.quacks ) {}
14. Bytecode
Specific low-level commands
✦
Written in machine code
✦
a + b;
✦
PLUS( a, b ) {
✦
IF ISSTRING(a) OR ISSTRING(b) {
return CONCAT( a, b );
} ELSE {
return ADD( a, b );
}
}
17. TraceMonkey
Firefox uses an engine called
✦
SpiderMonkey (written in C)
Tracing technology layered on for Firefox
✦
3.1 (dubbed ‘TraceMonkey’)
Hyper-optimizes repeating patterns into
✦
bytecode
http://ejohn.org/blog/tracemonkey/
✦
18. Tracing
for ( var i = 0; i < 1000; i++ ) {
✦
var foo = stuff[i][0];
foo = “more stuff ” + someFn( foo );
}
function someFn( foo ) {
return foo.substr(1);
}
Loop is costly
✦
✦ ISNUM(i)
✦ ADD(i, 1)
✦ COMPARE( i, 1000 )
19. Function Inlining
for ( var i = 0; i < 1000; i++ ) {
✦
var foo = stuff[i][0];
foo = “more stuff ” + foo.substr(1);
}
20. SquirrelFish
Just-in-time compilation for JavaScript
✦
Compiles a bytecode for common
✦
functionality
Specialties:
✦
✦ Bytecodes for regular expressions (super-
fast)
http://arstechnica.com/journals/linux.ars/2008/10/07/extreme-
✦
javascript-performance
21. Chrome V8
Makes extensive use of shaping (fast
✦
property lookups)
Hyper-optimized function calls and
✦
recursion
Dynamic machine code generation
✦
http://code.google.com/p/v8/
✦
22. Measuring Speed
SunSpider
✦
✦ Released by the WebKit team last fall
✦ Focuses completely on JavaScript
Dromaeo
✦
✦ Released by Mozilla this spring
✦ Mix of JavaScript and DOM
V8 Benchmark
✦
✦ Released by Chrome team last month
✦ Lots of recursion testing
Quality: http://ejohn.org/blog/javascript-benchmark-quality/
✦
27. Network
Steve Souders’ UA tool:
✦
http://stevesouders.com/ua/
Also see: YSlow
✦
28. Simultaneous Conn.
Number of downloads per domain
✦
Should be at least 4
✦
✦ FF 2, IE 6, and IE 7 are 2
✦ Safari is 4
✦ Everyone else is 6-7
Max connections: Number of simultaneous
✦
downloads
✦ Firefox, Opera: 25-30
✦ Everyone else: 50-60
29. Parallel Scripts
Download scripts simultaneously
✦
Even though they must execute in order
✦
<script defer>
✦
✦ From Internet Explorer
✦ Just landed for Firefox 3.1
✦ In Opera as well
✦ Replacement for JavaScript-based
loading
30. Redirect Caching
A simple request:
✦
http://foo.com ->
http://www.foo.com ->
http://www.foo.com/
Very costly, should be cached.
✦
Chrome and Firefox do well here.
✦
31. Link Prefetching
<link rel=”prefetch” href=”someimg.png”/>
✦
Pre-load resources for later use
✦
✦ (images, stylesheets)
Currently only in Firefox
✦
Replacement for JavaScript preloading
✦
33. postMessage
A way to pass messages amongst multiple
✦
frames and windows
Implemented in all browsers (in some
✦
capacity).
Sending a message:
✦
iframe.postMessage(“test”,
✦
“http://google.com/”);
34. postMessage
Receiving a Message:
✦
window.addEventListener(”message”, function(e){
✦
if (e.origin !== “http://example.com:8080“)
return;
alert( e.data );
}, false);
35. Cross-Domain XHR
Landed in Firefox 3.1, support in IE 8
✦
Add a header to your content:
✦
Access-Control-Allow-Origin: *
XMLHttpRequest can now pull it in, even
✦
across domains
https://developer.mozilla.org/En/
✦
HTTP_Access_Control
37. Class Name
New method:
✦
getElementsByClassName
Works just like:
✦
getElementsByTagName
Fast way of finding elements by their class
✦
name(s):
<div class=”person sidebar”></div>
document.getElementsByClassName(“sidebar”)
✦
Safari 3.1, Firefox 3.0, Opera 9.6
✦
Drop-in replacement for existing queries
✦
39. Selectors API
querySelectorAll
✦
Use CSS selectors to find DOM elements
✦
document.querySelectorAll(“div p”)
✦
Good cross-browser support
✦
✦ IE 8, Safari 4, FF 3, Opera 10
Drop-in replacement for JavaScript
✦
libraries.
43. HTML 5 Dragging
Includes full support drag and drop events
✦
Events: dragstart, dragend, dragenter,
✦
dragleave, dragover, drag, drop
<div draggable=”true”
✦
ondragstart=”event.dataTransfer.setData
(’text/plain’, ‘This text may be dragged’)”>
This text <strong>may</strong> be
dragged.
</div>
Only in Firefox 3.1
✦
44. Bounding
getBoundingClientRect
✦
✦ Introduced by IE
✦ Seeing a wider introduction
Super-fast way to determine the position
✦
of an element
Better alternative to manual computation
✦
45. JavaScript Threads
JavaScript has always been single-threaded
✦
Limited to working linearly
✦
New HTML 5 Web Workers
✦
Spawn JavaScript threads
✦
Run complicated work in the background
✦
✦ Doesn’t block the browser!
Drop-in usable, huge quality boost.
✦
46. A Simple Worker
var myWorker = new Worker(’my_worker.js’);
✦
myWorker.onmessage = function(event) {
alert(”Called back by the worker!n”);
};
47. Styling and Effects
Lots of commons styling effects
✦
Can be replaced and simplified by the
✦
browser
Drastically simplify pages and improve
✦
their performance
48. Rounded Corners
CSS 3 specification
✦
Implemented in Safari, Firefox, Opera
✦
✦ -moz-border-radius: 5px;
✦ -webkit-border-radius: 5px;
Can replace clumsy, slow, old methods.
✦
49. Shadows
Box Shadows
✦
✦ Shadow behind a div
-webkit-box-shadow: 5px 5px 5px rgba(0, 0, 0, 0.5)
✦
Text Shadows
✦
✦ Shadow behind some text
text-shadow: -1px -1px #666, 1px 1px #FFF;
✦
Implemented in WebKit, Firefox
✦
Can replace clumsy, slow, old methods.
✦
50. Example Shadows
Demos: http://maettig.com/code/css/text-
✦
shadow.html
http://webkit.org/blog/86/box-shadow/
51. Custom Fonts
Load in custom fonts
✦
Can load TrueType fonts
✦
Implemented in Safari and Firefox
✦
Demo: http://ejohn.org/apps/fontface/
✦
blok.html
Can replace using Flash-based fonts.
✦
52. Transforms and Animations
Transforms allow you to rotate, scale, and
✦
offset an element
✦ -webkit-transform: rotate(30deg);
Animations allow you to morph an
✦
element using nothing but CSS
✦ -webkit-transition: all 1s ease-in-out;
Implemented in WebKit and Firefox
✦
Demo: http://www.the-art-of-web.com/css/
✦
css-animation/
Can replace JS animations, today.
✦
53. Canvas
Proposed and first implemented by Apple
✦
in WebKit
A 2d drawing layer
✦
✦ With possibilities for future expansion
Embedded in web pages (looks and
✦
behaves like an img element)
Works in all browsers (IE with ExCanvas)
✦
Offload rendering to client
✦
Better user interaction
✦
54. Shapes and Paths
NOT vectors (unlike SVG)
✦
Rectangles
✦
Arcs
✦
Lines
✦
Curves
✦
Charts:
✦
55. Fill and Stroke
All can be styled (similar to CSS)
✦
Stroke styles the path (or outline)
✦
Fill is the color of the interior
✦
Sparklines:
✦
56. Canvas Embedding
Canvases can consume:
✦
✦ Images
✦ Other Canvases
Will be able to consume (Firefox 3.1, Safari
✦
4):
✦ Video
In an extension:
✦
✦ Web Pages
58. SQL Storage
Part of HTML 5 - a full client-side SQL
✦
database (SQLite)
Implemented in WebKit
✦
var database = openDatabase(”db”, “1.0”);
✦
database.executeSql(”SELECT * FROM test”, function(result1) {
// do something with the results
database.executeSql(”DROP TABLE test”);
});
59. Native JSON
JSON is a format for transferring data
✦
✦ (Uses JavaScript syntax to achieve this.)
✦ Has been slow and a little hacky.
Browser now have native support in
✦
Firefox 3.1 and IE 8
Drop-in usable, today
✦
✦ JSON.encode(object)
✦ JSON.decode(string)
62. Painting
When something is physically drawn to
✦
the screen
Hard to quantify without more
✦
information
Firefox 3.1 includes a new event:
✦
MozAfterPaint
Demo: http://ejohn.org/blog/browser-
✦
paint-events/
64. Reflow
CSS has lots of boxes in it
✦
Position of boxes is constantly recomputed
✦
and repositioned (before being painted)
✦ This is reflow
Demo: http://dougt.wordpress.com/
✦
2008/05/24/what-is-a-reflow/
65. Questions?
John Resig
✦
http://ejohn.org/
http://twitter.com/jeresig/