also
- different versions (3.x vs 4.x) of OpenCV
- different versions (2015, 2019) or VS
- different parallel frameworks (OpenMP vs Concurrency)
just diff the build information dumps and you’ll see what you can investigate.
both MREs use wall clock time so that’s tolerable but still not comparable. HOWEVER python’s time.time() is fairly coarse on windows (~10-16 ms). just use OpenCV’s getTickCount(). if you use the same opencv versions (!), that would be comparable.