[Qt-interest] how to computing costed time of a function?

[James Yan]

with windows API, i can :

===
LARGE_INTEGER  feq,t_start,t_end;
int                         cost_time;

QueryPerformanceFrequency(&feq);

QueryPerformanceCounter(&t_start);
something_cost_time();
QueryPerformanceCounter(&t_end);

cost_time = (int)((t_end.QuadPart-t_start.QuadPart)*1000/feq.QuadPart);===

how to with Qt? can archive the same granularity?  thanks.
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