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  • Re: IIS express requests take 4 times longer to execute

    Jan 25, 2011 04:12 PM|davcox|LINK

    Yes, you should expect that IIS Express is not as fast as IIS on Windows 2008 R2.

    A couple reasons:

    • <div mce_keep="true">the product is compiled to work on XP and above and so has to use the lowest common denominator API's, libraries and modules</div>
    • <div mce_keep="true">we don't use the kernel mode cache at all and so we don't get the automatic caching that it provides for static content</div>
    • <div mce_keep="true">we use user-mode logging, instead of kernel mode logging</div>
    • <div mce_keep="true">like you said, running iisexpress.exe from a cmdline will dump trace output which could slow down iis express</div>