Timing a loop in microseconds 2

[Disruptive]

How can I introduce timing for a routine/loop in C, I seem to see so many conflicting and not working examples on the web. I can time in seconds but some of these processes are lasting less than a second so it does not help with my optimisation. Could some point to some useful code that will enable me to time my routines.

Thanks

 

[Salem]

> I seem to see so many conflicting and not working examples on the web.
That's because sub-second timing accuracy is heavily dependent on your OS and compiler (which you continue to omit from any of your posts).

State your OS / Compiler / processor, and be specific about it. "Windows", "Microsoft", "Intel" just won't cut it.

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[Disruptive]

Using gcc on a linux box, debian base

 

[maur3r]

You can use clock() function from <time.h>

clock_t start, finish;
double duration;
start=clock();
/* your loop */
finish=clock();
duration=(double)(finish -start)/CLOCKS_PER_SEC;

If someone knows other (maybe more accurate) way to measure loop execution time, I will appreciate it cause I am also looking for such fuction

Martin

 

[Salem]

My replies here -

http://www.tek-tips.com/viewthread.cfm?qid=1283769&page=1

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[Disruptive]

Just to follow up, I managed to play around and replace the fmod with a floor function with modifications. This seems to run a little quicker. I guess it is much easier to calculate than fmod or so it would seem!

Thanks again guys!