ASP.NET Tracing

Easy, but powerful. Add Trace.Write( "foo" ); somewhere in your code-behind page, and then turn on trace output in the web.config file.

    <trace

        enabled="true"

        requestLimit="10"

        pageOutput="false"

        traceMode="SortByTime"

        localOnly="true"

    />

Now browse to your application root directory, for the file named trace.axd. In the details for the given page, under "Trace Information", you will see your trace output, along with timings.