Examine a long time to first byte
[Edit]
Troubleshoot a long time to first byte (TTFB) for an IIS server running EPiServer CMS.
TTFB (Time To First Byte) indicate that the web service does a lot of work before it returns anything to the browser.
Normal issues with EPiServer
Custom code in the friendly URL rewriter
The rewriting of friendly URL to EPiserver internal URLs is done on the pages begin request, and can cause a long TTFB for web pages.
Custom virtual path providers
Sense the first byte of a file is send after the handling in the VPP it causes a long TTFB for files, if it takes a long time to execute.
EPiServer version
All