Re: [Fwd: [Bug c++/14563] octave built under Cygwin very slow]

[Paul Kienzle]

Tests of malloc and new [] for cygwin and mingw 3.2 and 3.3 and linux 
gcc 3.3.
Someone please fill in numbers for 'native' windows compilers, such as
visual C and Intel.

=== Times, running under msys on a Windows 2000 PII-300 system

System          real            user            sys
mingw333        17.936  0.030   0.040
cygwin331       72.394  0.020   0.060
Cmingw333       12.277  0.010   0.060
Ccygwin331      24.355  0.030   0.050

System          real            user            sys
mingw323        18.837  0.020   0.040
mingw32         14.160  0.010   0.060
cygwin32                15.933  0.020   0.050
Cmingw32        12.668  0.030   0.040
Ccygwin32       14.410  0.010   0.080

=== Times, running under bash on a Debian PII-400 system

System          real            user            sys
linux332                 4.808  4.800   0.010
Clinux332        3.162  3.160   0.000

=== Versions

mingw32         3.2 (mingw special 20020817-1)
mingw323        3.2.3 (mingw special 20030504-1)
mingw333        3.3.3 (mingw special)
cygwin32                3.2 (20020927 prerelease), linked against stdc++.dll
cygwin331       3.3.1-3 (cygming special)
linux332                3.3.2 20030908 (Debian prerelease)

=== C++ Compiled with g++ -O2.  Run under msys.
// Author Paul Thomas
#include <iostream>
using namespace std;

int main()
{
  for (int iloop = 0; iloop < 10000000; iloop++)
  {
    double *myarray;
    if ((myarray = new double [1]) == NULL)
        cout << "unable to allocate my array at iloop=" << iloop << 
endl;
    delete [] myarray;
  }
  cout << "done looping" << endl;
  return 0;
}

=== C Compiled with gcc -O2.  Run under msys.
/* modified from C++ by Paul Kienzle */
#include <stdio.h>
int main()
{
  int iloop;
  for (iloop = 0; iloop < 10000000; iloop++)
  {
    double *myarray = (double *)malloc(sizeof(double));
    if (myarray== NULL) { printf("alloc failed\n"); exit(1); }
    else free (myarray);
  }
  return 0;
}