[Bug target/14563] new/delete much slower than malloc/free because of sjlj exceptions

[ron_hylton at hotmail dot com]

------- Additional Comments From ron_hylton at hotmail dot com  2004-11-10 
16:20 -------
(In reply to comment #40)
> Ron, can you please attach your testcase that shows the problem to this PR?
> 
> This PR is a regression on cygwin because the speed is back with 3.2.

This is the test case I was using:

#include <iostream>
#include <stdio.h>
#include <time.h>
#include <string>
using namespace std;

int main()
{
        int array_size = 100;
        int loop_count = 3000000;
        try
        {
                long t1 = clock();
                for (int iloop = 0; iloop < loop_count; iloop++)
                {
                        int *myarray = new int [array_size];
                        delete [] myarray;
                }
                long t2 = clock();
                double delt1 = (double)( t2 - t1 )/ (double)(CLOCKS_PER_SEC);
                cout << "done looping time 1=" << delt1 << endl;
                long t3 = clock();

                for (int jloop = 0; jloop < loop_count; jloop++)
                {
                        int *myarray = (int *)malloc(array_size * sizeof(int));
                        if (myarray== NULL) { printf("alloc failed\n"); 
exit(1); }
                        else free (myarray);
                }
                long t4 = clock();
                double delt2 = (double)( t4 - t3 )/ (double)(CLOCKS_PER_SEC);
                cout << "done looping time 2=" << delt2 << endl;
        }
        catch (...)
        {
                cout << "exception" << std::endl;
                return 1;
        }

        return 0;
}


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14563