[CCarl]

Is there a way to get a CPU time difference with more precision?

The standard for runTime.elapsedCpuTime() seems to be two digits. When printing more digits using setprecision(18), I just get extra 0's or 9's, not really a higher precision?

[cfdopenfoam]

Originally Posted by CCarl

Is there a way to get a CPU time difference with more precision?

The standard for runTime.elapsedCpuTime() seems to be two digits. When printing more digits using setprecision(18), I just get extra 0's or 9's, not really a higher precision?

Hi, did you find a way to do this?

[lxufeishi]

The "clockTime" Class would help, as its description:
"Starts timing and returns elapsed time from start. Uses std::chrono::high_resolution_clock for better resolution (2uSec instead of ~20mSec) than cpuTime. "

So the code would be like:

#include "clockTime.H"

Foam::clockTime myTime; 

Info<< "ExecutionTime = " << runTime.elapsedCpuTime() << " s"
      //<< "  ClockTime = " << runTime.elapsedClockTime() << " s"
      << "  ClockTime = " << myTime.elapsedTime() << " s"
      << endl;

ref.https://www.openfoam.com/documentati...clockTime.html