How to profile lines of code in script

You would think this is very common but I can't find out how to profile how long particular blocks of code take to execute.

I tried
int start = System.Environment.TickCount;
DoSomething();
int end = System.Environment.TickCount;
tine time - start - end;

However, while the function actually took a minute the returned value was like 3000, which I assume means 3 seconds.

I also tried Profiler.BeginSample, however the sample did not show up or else I can't find it - this is code that only runs one time when I press a button.

This is in editor mode, not play mode.

 

Code (CSharp):

1. System.Diagnostics.Stopwatch sw = new System.Diagnostics.Stopwatch();
2. sw.Start();
3. //  Run code
4. sw.Stop();
5. double elapsedMilliseconds = sw.Elapsed.TotalMilliseconds;

 

I would run with Profiler.BeginSample and Profiler.EndSample. You then have to run the project with the profiler attatched.

Most of the time in well structured code you don't actually need to put on the sample calls, the profiler will do it well enough just based on the method calls.