Check Speed on VS2010

[hentaiw]

Hello,

How can I check the speed of running a code ? I use VS2010

[hentaiw]

24 hours are gone,has nobody answered ?

[Moschops]

Get time at start. Get time at end. Difference between two is how long the code took to run.

[hentaiw]

Thanks,

Is there any clock that check in unit of nanoseconds,to see if the time needed by an algorithm to work ?

[wjee0910]

Yes, there is.
Look up the <ctime> library on this site.

[hentaiw]

Thank you all,solved.

[Moschops]

As an aside, if you've got a reasonable C++11 implementation, this example shows how to measure the time a function took.

#include <iostream>
#include <chrono>
#include <thread>
void f()
{
    std::this_thread::sleep_for(std::chrono::seconds(1));
}
int main()
{
    auto t1 = std::chrono::high_resolution_clock::now();
    f();
    auto t2 = std::chrono::high_resolution_clock::now();
    std::cout << "f() took "
              << std::chrono::duration_cast<std::chrono::milliseconds>(t2-t1).count()
              << " milliseconds\n";
}

[hentaiw]

And about delaying,is it in the same library ? I really confused when load of codes run fast and hard to check.

#include <chrono>
#include <thread> 

I don't have these 2 libraries in VS2010.