mixpp: Using timers to measure execution time
BDM Use - in C++

Using timers to measure execution time

In this example we are using the Real_Timer class to measure the execution time of a simple program. The Real_Timer class is included in the itmisc library.

#include <itpp/itbase.h>
using namespace itpp;
//These lines are needed for use of cout and endl
using std::cout;
using std::endl;
int main() {
    //Declare the scalars used:
    long i, sum, N;
    //Declare tt as an instance of the timer class:
    Real_Timer tt;
    //Initiate the variables:
    N = 1000000;
    sum = 0;
    //Start and reset the timer:
    tt.tic();
    //Do some processing
    for ( i = 0; i < N; i++ ) {
        sum += i;
    }
    // Print the elapsed time
    tt.toc_print();
    //Print the result of the processing:
    cout << "The sum of all integers from 0 to " << N - 1 << " equals " << sum << endl;
    //Exit program:
    return 0;
}

When you run this program, the output will look something like this:

Elapsed time = 0.000797055 seconds
The sum of all integers from 0 to 999999 equals 1783293664
Generated on 2 Dec 2013 for mixpp by  doxygen 1.4.7