What methods can you use to profile your code

Question

Some of the platforms I'm developing do not have profiling tools. I am looking for suggestions / methods that you personally used to help you identify hot spots, without using a profiler.

The final language is C ++.

I'm interested in what you personally used.

Answer 1

I found the following quite useful:

#ifdef PROFILING
# define PROFILE_CALL(x) do{ \
    const DWORD t1 = timeGetTime(); \
    x; \
    const DWORD t2 = timeGetTime(); \
    std::cout << "Call to '" << #x << "' took " << (t2 - t1) << " ms.\n"; \
  }while(false)
#else
# define PROFILE_CALL(x) x
#endif

What can be used in the calling function as such:

PROFILE_CALL(renderSlow(world));
int r = 0;
PROFILE_CALL(r = readPacketSize());

Answer 2

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. rgb (255,0,0) .

, / Beeps , , , , , .. , .

Answer 3

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, , , , .

Answer 4

- (, ), , , , , (, 10 , , - !). , , ..

Answer 5

, , , / .

Answer 6

80/20 . , (, , ), , (QueryPerformanceCounters, gettimeofday ..).

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Answer 7

Visual Studio?

/Gh /GH.

, -, , , / .

Then you can log all profiling data, not just time information. Stack-dumps, call address, return address, etc. This is important because you may know that “function X uses Y-time under function Z” and not just the total time spent on function X.