Re: timing an application

[Chris Friesen]

Maciej Soltysiak wrote:
> Hi,
> 
> being inspired by some book about optimizing c++ code i decided to do
> timing of functions i wrote. I am using gettimeofday to set
> two timeval structs and calculate the time between them.
> But the results depend heavily on the load, also i reckon that this
> is an innacurate timing.
> 
> Any ideas on timing a function, or a block of code? Maybe some kernel
> timers or something.

gettimeofday() is accurate.  However, your task may be interrupted by
other tasks, interrupts, etc.

Your best bet may be to do many iterations of the routine in question and then
do some statistical analysis of the results.

Chris

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