On Tue, Jul 26, 2016 at 11:21 AM, Dmitry Boyarintsev < skalogryz.li...@gmail.com> wrote:
> Maybe you want to look into QueryPerformanceCounter. > > https://msdn.microsoft.com/en-us/library/windows/desktop/ms644904(v=vs.85).aspx > > Here's an example: {$mode objfpc}{$H+} uses Windows; const MSInSec = 1000; MCInSec = MSInSec * 1000; NSInSec = MCInSec * 1000; function LargeLoop: Integer; var i : integer; begin Result:=0; for i:=0 to 1000 do inc(Result); //or you can verify Sleep(milliseconds) //Sleep(100); end; var fr : TLargeInteger; ct : TLargeInteger; af : TLargeInteger; d : double; diff : TLargeInteger; begin QueryPerformanceFrequency(fr); writeln('Frequency: ' ,fr); d:=(1/fr) * NSInSec; writeln('Freq in Time: ', d:0:0, ' ns (roughly)'); QueryPerformanceCounter(ct); LargeLoop; QueryPerformanceCounter(af); diff := af - ct; writeln('Loop:'); writeln(' Ticks: ', diff); writeln(' Time: ', ((diff/fr) * NSInSec):0:0,' ns' ); writeln(' ', ((diff/fr) * MCInSec):0:6,' mcs' ); writeln(' ', ((diff/fr) * MSInSec):0:6,' ms' ); end.
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