# Fiddler

In a UI-oriented scenario, the first recommended analysis tool is to use an http logger like fiddler (http://www.fiddler2.com). This tool should make it apparent if there are excessive calls from the client browser to the server and the server response times as seen from the browser. The timings can then be categorized as server-side or client-side calls. When using fiddler be sure to enable the following:

- "Time-to-Last-Byte"
- "Response Timestamp"

Parent topic: Diagnosing Performance Issues