Configuring HTTP Compression in IIS 7

Applies To: Windows 7, Windows Server 2008, Windows Server 2008 R2, Windows Vista

If your sites use lots of bandwidth, or if you want to use bandwidth more effectively, enable compression to provide faster transmission times between IIS and compression-enabled browsers. If your network bandwidth is restricted, as it is, for example, with mobile phones, compression can improve performance.

IIS provides the following compression options:

Static files only
Dynamic application responses only
Both static files and dynamic application responses

Compression of dynamic application responses can affect CPU resources because IIS does not cache compressed versions of dynamic output. If compression is enabled for dynamic responses and IIS receives a request for a file that contains dynamic content, the response that IIS sends is compressed every time it is requested. Because dynamic compression consumes significant CPU time and memory resources, use it only on servers that have slow network connections but that have CPU time to spare.

Unlike dynamic responses, compressed static responses can be cached without degrading CPU resources.

Prerequisites

For information about the levels at which you can perform these procedures, and the modules, handlers, and permissions that are required for these procedures, see HTTP Compression Feature Requirements (IIS 7).

Procedures

This task includes the following procedures:

Configure Compression (IIS 7)

Enable HTTP Compression of Dynamic Content (IIS 7)

Enable HTTP Compression of Static Content (IIS 7)

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Enabling compression on IIS7

tzxr900 | Edit | Show History

In addition to the above - not all file types are compressed by default. You need to edit the system.webServer/httpCompression configuration (get the Admin Pack extension and use the Configuration Editor feature - simplifies the process). Once you change the config, you need to recycle the application-pool for the changes to httpCompression to be picked up by the IIS7.
Request - could people writing these tutorials (which are in general quite helpful) provide all the information and save others hours of searching the web, please? Thanks.