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
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.
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.