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Use high-resolution timer on Windows

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This fixes a Windows specific issue where the
problem-summary reports timings as zero, as long as
the time difference in question is smaller than one
second.

Change-Id: Ibd91874294423af6acda2575eae80f01aabed6d3
This commit is contained in:
Thomas Gamper
2017-09-25 14:41:22 +02:00
committed by Sameer Agarwal
parent 4bea6d7a2d
commit 28b1147a1d
1 changed files with 6 additions and 1 deletions
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internal/ceres/wall_time.cc
+6 -1
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@@ -50,7 +50,12 @@ double WallTimeInSeconds() {
return omp_get_wtime(); return omp_get_wtime();
#else #else
#ifdef _WIN32 #ifdef _WIN32
return static_cast<double>(std::time(NULL)); LARGE_INTEGER count;
LARGE_INTEGER frequency;
QueryPerformanceCounter(&count);
QueryPerformanceFrequency(&frequency);
return static_cast<double>(count.QuadPart) /
static_cast<double>(frequency.QuadPart);
#else #else
timeval time_val; timeval time_val;
gettimeofday(&time_val, NULL); gettimeofday(&time_val, NULL);