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I would like to test how fast does my projects function work. It would be great if there were a possibility to mark slow places of my function as well so I can change my code to increase performance. I'm using Microsoft Visual Studio 2012 and I know that there is a build-in testing tool but I don't really know where to find it and probably how to use it as well. It would be great if someone could help me with this issue.
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Use timestamp function to measure the speed of code. The timestamp function placed twice in a program one at starting of program and another at end of the program. Then the time difference between end time and start time is the actual speed of code.
Open the Performance Profiler by choosing Debug > Performance Profiler (or Alt + F2). For more information on using the CPU Usage or Memory usage tool in the Performance Profiler vs. the debugger-integrated tools, see Run profiling tools with or without the debugger.
If milliseconds then in Visual Studio 2019 you can see the time between two breakpoints under Diagnostic Tools -> Events -> Duration (opens automatically in Debug mode, or use Ctrl + Alt + F2 ).
Visual Studio shows execution time in milliseconds for each line or when Run To Click is used during debugging session, which can give some rough idea of the statement execution time:
For simple measurements Stopwatch class can be a handy option too.
For more advanced scenarios there is a built-in profiler in Visual Studio Analyze CPU usage without debugging in the Performance Profiler.
And for precise performance measurements there is an excellent and powerful tool BenchmarkDotNet.
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