From 840e906a4ddbbb32b8a5989e8a0ce10c8c374819 Mon Sep 17 00:00:00 2001 From: B Stack Date: Tue, 2 Mar 2021 17:23:41 -0500 Subject: add upstream 11.7 --- zen/perf.h | 23 +++++++++++------------ 1 file changed, 11 insertions(+), 12 deletions(-) (limited to 'zen/perf.h') diff --git a/zen/perf.h b/zen/perf.h index 6bc328bb..2ebf1955 100644 --- a/zen/perf.h +++ b/zen/perf.h @@ -23,21 +23,20 @@ static zen::PerfTimer perfTest(true); //startPaused perfTest.resume(); - ZEN_ON_SCOPE_EXIT(perfTest.pause()); -*/ + ZEN_ON_SCOPE_EXIT(perfTest.pause()); */ namespace zen { -//issue with wxStopWatch? https://freefilesync.org/forum/viewtopic.php?t=1426 -// => wxStopWatch implementation uses QueryPerformanceCounter: https://github.com/wxWidgets/wxWidgets/blob/17d72a48ffd4d8ff42eed070ac48ee2de50ceabd/src/common/stopwatch.cpp -// => whatever the problem was, it's almost certainly not caused by QueryPerformanceCounter(): -// MSDN: "How often does QPC roll over? Not less than 100 years from the most recent system boot" -// https://docs.microsoft.com/en-us/windows/win32/sysinfo/acquiring-high-resolution-time-stamps#general-faq-about-qpc-and-tsc -// -// => using the system clock is problematic: https://freefilesync.org/forum/viewtopic.php?t=5280 -// -// std::chrono::system_clock wraps ::GetSystemTimePreciseAsFileTime() -// std::chrono::steady_clock wraps ::QueryPerformanceCounter() +/* issue with wxStopWatch? https://freefilesync.org/forum/viewtopic.php?t=1426 + - wxStopWatch implementation uses QueryPerformanceCounter: https://github.com/wxWidgets/wxWidgets/blob/17d72a48ffd4d8ff42eed070ac48ee2de50ceabd/src/common/stopwatch.cpp + - whatever the problem was, it's almost certainly not caused by QueryPerformanceCounter(): + MSDN: "How often does QPC roll over? Not less than 100 years from the most recent system boot" + https://docs.microsoft.com/en-us/windows/win32/sysinfo/acquiring-high-resolution-time-stamps#general-faq-about-qpc-and-tsc + + - using the system clock is problematic: https://freefilesync.org/forum/viewtopic.php?t=5280 + + std::chrono::system_clock wraps ::GetSystemTimePreciseAsFileTime() + std::chrono::steady_clock wraps ::QueryPerformanceCounter() */ class StopWatch { public: -- cgit