下一代Web前端技术 陈子舜
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- Web performance optimization techniques aim to improve load times and responsiveness, with the goal of enhancing the user experience. Common techniques include using browser caching, service workers, and HTTP/2 to reduce network requests and latency. - Mobile web performance can be significantly impacted by network conditions like 2G, 3G, 4G, and WiFi. Factors like CPU, GPU, and app architecture also influence performance. Techniques like app shells, asynchronous resource loading, and responsive design help optimize the mobile web. - Transitioning from HTTP to HTTPS, along with protocols like SPDY and HTTP/2, have helped reduce web page load times over the past decade through features that compress headers, prioritize requests, and multiple
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The document discusses the features and capabilities of HTML5. It covers new semantic elements, forms, offline storage, device access, multimedia, 3D graphics, performance improvements, and CSS3 features. Key points include more meaningful tags, custom data attributes, offline application caching, geolocation, cameras, web sockets, and canvas/WebGL for graphics.
Speed = $$$
Why is Performance important?
Applications in general
Web applicaitons
What can we as devs do?
Tips: How to optimize
Web applications, Silverlight, Backend, …
Regression
How to maintain performance over time
How to get faster over time
Discussion: What tips do you have in your toolbox?
HTML5 Hacking - Yahoo! Open Hack Day
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Html5
HTML5 is a new version of HTML that includes new elements, forms, audio/video playback, drawing, and more. It can be used to build dynamic UIs and web applications. The speaker will provide an introduction to HTML5, demonstrate new elements like <canvas> and audio/video playback, discuss browser support, and provide tutorials and live demos.
High performance website
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Google App Engine
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Javascript & Jquery
JavaScript is a client-side scripting language that allows for more web functionality on the user's machine, improving server performance and page load times. jQuery is a popular JavaScript library that simplifies tasks like HTML document manipulation, event handling, and Ajax calls. To use jQuery, include the jQuery script in an HTML file and use jQuery syntax with $ selectors to target elements and perform actions on them. Callbacks allow functions to execute asynchronously after their parent functions complete.
InfoTalk#17 1st
HTML5 is a new version of the HTML standard that was developed by the W3C and WHATWG to address limitations in previous versions and support new features. It includes new elements, scripting APIs, and various application programming interfaces. HTML5 aims to improve web applications by including features like local storage, web workers, geolocation, canvas, video and audio elements, and more. Demos and examples show how HTML5 features can be used to build richer applications that work offline and have capabilities similar to native desktop apps.
Configuring Apache Servers for Better Web Perormance
Apache is the most popular web server in the world, yet its default configuration can't handle high traffic. Learn how to setup Apache for high performance sites and leverage many of its available modules to deliver a faster web experience for your users. Discover how Apache can max out a 1 Gbps NIC and how to serve over 140,000 pages per minute with a small Apache cluster. This presentation was given by Spark::red's founding partner Devon Hillard in March 2012 at the Boston Web Performance Meetup.
Upstate CSCI 450 WebDev Chapter 1
Scientists created HTML to share information on the early World Wide Web using simple text files marked up with HTML tags. As the web grew, browsers were developed to interpret HTML pages and retrieve images and other files from web servers in response to user requests. Today, web developers must test their sites across different browsers, operating systems and devices to ensure their content displays properly for all users.
Android lessons you won't learn in school
This document discusses several lessons about Android development that are not typically covered in school. It covers architectural changes in Android over time, security best practices, techniques for logging user activity and crash reports, strategies for building hybrid mobile-web applications, considerations for creating mobile SDKs, and approaches for testing Android apps on multiple device configurations.
Developer Tools And Page Speed
This document provides an overview of developer tools, page speed optimization, and the Closure Library. It discusses how developer tools can help inspect pages, track resources and scripts, and profile performance. It outlines Google's page speed rules around caching, reducing round trips, minimizing overhead and payload size, and optimizing rendering. Finally, it introduces the Closure Library and how it provides modular and tested JavaScript as well as templates and linting to generate HTML and check code quality.
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下一代Web前端技术 陈子舜
- 2. Web Web @
- 3. • @ • Web @ SNG • @
- 4. • • • Yahoo xxx • js • CSS • • • …
- 5. ...
- 6. , Web 1
- 7. (HCI) Page 135 Jakob Nielsen , 1994
- 9. • • 2G, 3G, 4G, wifi • • CPU, GPU, • •
- 10. <HTML>
- 11. <HTML> TCP, DNS, HTTPS WebViewPerformance Timeline Resource Timing User Timing (performance.mark) Frame Timing* (new PerformanceObserver) Server Timing*
- 12. 1S , 2
- 14. H5 • • • • app • H5 • • H5 / • App
- 16. • • HTTP Cache • Web Storage • • Application Cache • Hybrid App • Service Worker
- 17. Alloykit • • HTTP Cache • Web Storage • • Application Cache • Hybrid App • Service Worker
- 18. Hybrid App H5 • • • • • Web WebView / Native App + <HTML> Web WebView
- 19. Hybrid App • Service Worker — “ ” Web Server https://jakearchibald.github.io/isserviceworkerready/resources.html
- 20. Service Worker ES6 Promise CacheStorage Cache fetch Response Blob install register activated Idle waitinstall fetch `
- 21. Service Worker Page Service Worker install CacheStorage network activated
- 22. 3
- 25. 90w0.8% ≈ • Qzone 0.8% 90w
- 30. SPDY HTTP2 • • • • • (HTTP2) 2 2G 20Mbps
- 31. SPDY HTTP2 • HSTS(HTTP Strict Transport Security) 302 • Http 1.x • spdy/http2 • HTTPS Proxy+SNI CDN • spdy/http2 • spdy
- 32. – “ ”
- 33. Thanks