In performance tuning tricks for ASP.NET and IIS 7 we will look at some of the easy, yet powerful possibilities in the web.config file. By taking advantage of these few tricks we can increase the performance of any new or existing website without changing anything but the web.config file.
The following XML snippets must be placed in the <system.webServer> section of the web.config.
You’ve always been able to perform HTTP compression in ASP.NET by using third-party libraries or own custom built ones. With IIS 7 you can now throw that away and utilize the build-in compression available from the web.config. Add the following line to enable HTTP compression:
<urlCompression doDynamicCompression="true" doStaticCompression="true" dynamicCompressionBeforeCache="true"/>
By default, only text based content types are compressed.
Setting this attribute to true enables compression of dynamically generated content such as pages, views, handlers. There really aren’t any reasons not to enable this.
This attribute allows you to decide whether or not you want static files such as stylesheets and script files to be compressed. Images and other non-text content types will not be compressed by default. This is also something you want to enable.
If you do output caching from within your ASP.NET website, you can tell IIS 7 to compress the output before putting it into cache. Only if you do some custom output caching you might run into issues with setting this to true. Try it and test it. If your website works with this enabled, then you definitely want to keep it enabled.