Thread: how can i figure out how mach time each line of code takes ?

good day,...

when creating an electrical diagram (vhdl code) u can calculate how much time each operation takes.
where can find this type of data with functions for example :

Code:

#include <stdio.h>

int main()
{
  int variable = 0;
  variable = variable + 1;
  retrurn 0;
}

and

Code:

#include <stdio.h>

int main()
{
  int variable = 0;
  variable = 1;
  retrurn 0;
}

returned the same time 0.004 ($time foo).
i know it works the same but here i do deferent operations
i tried googling for cycle count(didn't get any good answers).

anyway:
as said by our prof :
AND = 2ms to 4ms
NAND = 4ms.

do you know about instruction pipelines? CPU command caches? About optimization compilers? About profilers?

Do not start low-level code optimization before you learn these things... Time for executing the same C++ line of code will differ greatly on different CPUs, compilers etc. Why do you need to know this before you have a problem?

Originally Posted by jabka

good day,...

it was, until I saw your spelling.