你应该毫不犹豫地将那些执行时间超过100毫秒的脚本找出来，哪怕这些脚本只是在某些浏览器上运行不畅，这些脚本包含了一些需要执行很长时间的代码段，而这些代码应该通过性能检测工具进行重新评估。
You should be looking for any single script execution that takes 100ms or longer on any given browser; those methods involved with such a long execution should be evaluated for performance issues.
Silverlight 5拥有许多新功能，包括：通过GPU渲染二维和三维图形、远程视频控制、P/Invoke支持、浏览器内的信任应用、更好的性能和工具。
Silverlight 5 has many new features, including: 2D and 3D graphics rendered via the GPU, remote video control, P/Invoke support, in-browser trusted applications, better performance and tools.
测试Web应用程序：使用可以免费获得的工具来模拟Web浏览器，并验证Web应用程序的功能和性能。
Testing Web applications: Uses freely available tools to emulate a Web browser and verifies Web application functionality and performance.
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