IE9 全方位提速 中英对照

Windows® Internet Explorer® 9 实现了全方位提速，由 GPU 驱动的 HTML5 使网站能充分利用基于 Windows 系统的 PC 的能力。您通过网站提供的业务线应用程序速度快并且响应迅速，就像在 PC 上本地运行的应用程序一样。

等待浏览器完成任务是一个令人烦躁的过程。Internet Explorer 9 的启动和选项卡加载比 Internet Explorer 8 更快，并且提供多种途径使用户能快速访问他们需要的网站。所有这些综合起来，为信息工作者提供更高的生产力。

硬件加速文本、视频和图形
新的图形功能和改进的性能在 Internet Explorer 9 中提供了拟真的丰富体验。硬件加速文本、视频和图形意味着，访问网站就像运行直接安装在 Windows PC 上的应用程序一样。高清晰度视频流畅，图像更清晰，响应更迅速，色彩更真实，并且网站的互动性更强。网站和应用程序的加载更快并且响应更迅速，这归功于一些子系统的改进，比如新的 JavaScript 引擎利用了目前多核处理器的能力，使网站的响应速度变得很快。通过在您的 PC 上利用强大的新图形功能，Internet Explorer 9 在 Windows 上提供了卓越的 Web 体验。如果您的 PC 并没有利用新的图形功能所要求的硬件，Internet Explorer 9 将自动使用软件呈现选项作为显示网页的最佳方式。这都是自动进行处理的，用户无需更改任何设置或选项。

F12 开发人员工具
Internet Explorer 9 开发人员工具提供可以帮助开发人员快速制作原型、测试和调试网页的内置功能。根据 Internet Explorer 8 提供的工具进行构建，开发人员工具包括新的功能和改进：

用于检测网络流量的新选项卡。

改进处理大型 JavaScript 文件的性能。例如，含有 70,000 行或更多代码的文件。

用户代理切换工具。

这些工具帮助确保应用程序与最新版本的 Internet Explorer 兼容。

Web计时API. 使用 Internet Explorer 9 中的开发人员工具，与之前的 Internet Explorer 版本相比，开发人员现在甚至可以从更多的角度来衡量网站性能。然而，他们不能测量出用户实际体验的性能。为了解决这个问题，有些站点开发了他们自己的库，尝试测量网页上的实时性能，但这实际上引入了造成页面速度减慢的开销。我们相信 W3C WebTiming 规范（在撰写本文时，该规范正处于“工作草案”阶段）将是负责解决这个问题的一个很好的基础。使用 DOM 中的window.msPerformance 接口可以在 Internet Explorer 9 中访问 WebTiming 功能。开发人员也可以在开发人员工具中启用脚本调试，然后访问 window.msPerformance 对象。



以下是英文原文 :

All-around fast

Windows® Internet Explorer® 9 is all-around fast, with HTML5 powered by the GPU that allows websites to take full advantage of the power of Windows-based PCs. Line-of-business applications that you deliver through the web are fast and responsive—like the native applications on a PC.

Waiting for the browser to do something can be frustrating. Internet Explorer 9 starts up and launches tabs more quickly than Internet Explorer 8 and provides a variety of ways for users to quickly access the websites that they need. All of these combine to provide enhanced productivity for information workers.

Hardware-accelerated text, videos, and graphics

New graphic capabilities and improved performance provide immersive and rich experiences in Internet Explorer 9. Hardware-accelerated text, video, and graphics mean that websites perform like applications installed directly on Windows PCs. High-definition videos are smooth, graphics are clearer and more responsive, colors are truer, and websites are more interactive. Websites and applications load faster and are more responsive with subsystem enhancements like the new JavaScript engine that utilizes the power of current multi-core processors to make the web feel incredibly responsive. By taking advantage of powerful new graphics capabilities on your PC, Internet Explorer 9 provides a premium web experience on Windows. If your PC does not have the hardware that is required to take advantage of the new graphic capabilities, Internet Explorer 9 automatically uses the Software Rendering option as the best way to display webpages. This is all handled automatically, without users needing to change any settings or options.

F12 developer tools

Internet Explorer 9 developer tools provide built-in features that help developers to rapidly prototype, test, and debug webpages. Building on the tools provided in Internet Explorer 8, developer tools include new capabilities and improvements:

A new tab for inspecting network traffic.

Improved performance for working with large JavaScript files. For example, files that contain 70,000 lines of code or more.

A user agent switching tool.

These tools help ensure that applications work with the latest version of Internet Explorer.

Web Timing API. With the developer tools in Internet Explorer 9, developers can now measure even more aspects of website performance than in previous versions of Internet Explorer. However, they cannot measure the performance that users actually experience. To solve this problem, some sites develop their own libraries that try to measure live performance on webpages, but this can introduce overhead that actually slows pages down. We believe that the W3C WebTiming specification—which, as of this writing, is in the “Working Draft” stage—is a good foundation for responsibly solving this problem. The WebTiming functionality can be accessed in Internet Explorer 9 using the window.msPerformance interface in the DOM. Developers can also enable script debugging in the Developer Tools, and then access the window.msPerformance object.