> Why global _PyTime_GetWinPerfCounterWithInfo() is needed at all? It seems to me that _PyTime_GetPerfCounterWithInfo() can be used instead. Smaller API is better. I chose to expose _PyTime_GetWinPerfCounterWithInfo() to make my change as small as possible. I didn't want to break the old time.clock() clock by mistake. By the way, time.clock() is deprecated since Python 3.3. It's maybe time to drop it?