Category : C++ Source Code
Archive   : CHALLOC.ZIP
Filename : BENCH.CPP

 
Output of file : BENCH.CPP contained in archive : CHALLOC.ZIP
#include
#include
#include
#include
#include "challoc.h"

int Random(int num)
{
int Result = int(long(rand()) * num/(RAND_MAX+1));
return Result < 0 ? -Result : Result;
}

class IntSet : public ChunkAllocated
{
public:
IntSet();
int Foo[4];
};
IntSet::IntSet()
{
Foo[0] = Foo[1] = Foo[2] = Foo[3] = 0;
};

class IntSet2
{
public:
IntSet2();
int Foo[4];
};

IntSet2::IntSet2()
{
Foo[0] = Foo[1] = Foo[2] = Foo[3] = 0;
};

const int MAXPOINTERS = 512; // 1024
const int MAXITERATIONS = 1024; // 2048

IntSet *Pointers [MAXPOINTERS];
IntSet2 *Pointers2 [MAXPOINTERS];

int main(int argc , char **argv)
{
int i, j, k;
printf("Begin Benchmark\n");
time_t StartTime = time(NULL);
for(j = 0; j < MAXITERATIONS; ++j)
for(i = 0; i < MAXPOINTERS; ++i)
if(Pointers[k=Random(MAXPOINTERS)])
Pointers[k] = NULL;
float EmptyTime = difftime(time(NULL), StartTime);
printf( "empty loop time is %5.2f seconds\n", EmptyTime);

StartTime = time(NULL);
for(j = 0; j < MAXITERATIONS; ++j)
for(i = 0; i < MAXPOINTERS; ++i)
if(Pointers2[k=Random(MAXPOINTERS)])
{
delete Pointers2[k];
Pointers2[k] = NULL;
}
else
{
Pointers2[k] = new IntSet2;
assert(Pointers2[k] != NULL);
}
float StandardTime = difftime(time(NULL), StartTime);
printf( "Standard allocation time %5.2f seconds\n", StandardTime);


StartTime = time (NULL);
for(j = 0; j < MAXITERATIONS; ++j)
for(i = 0; i < MAXPOINTERS; ++i)
if(Pointers[k=Random(MAXPOINTERS)])
{
delete Pointers[k];
Pointers[k] = NULL;
}
else
{
Pointers[k] = new IntSet;
assert(Pointers[k] != NULL);
}
float ChunkTime = difftime(time(NULL), StartTime);
printf( "Chunk allocation time %5.2f seconds\n", ChunkTime);

printf(" Improvement = %5.2f %%\n", 100.0 *
(( StandardTime-EmptyTime) - (ChunkTime-EmptyTime) )
/ (StandardTime - EmptyTime) );
return 0;

}

/* End of file */


  3 Responses to “Category : C++ Source Code
Archive   : CHALLOC.ZIP
Filename : BENCH.CPP
”

  1. Daniel says:
    January 27, 2013 at 3:59 pm

    Very nice! Thank you for this wonderful archive. I wonder why I found it only now. Long live the BBS file archives!

  2. Joshie says:
    March 18, 2014 at 4:57 pm

    This is so awesome! 😀 I’d be cool if you could download an entire archive of this at once, though.

  3. DiskingRound says:
    January 14, 2015 at 10:57 pm

    But one thing that puzzles me is the “mtswslnkmcjklsdlsbdmMICROSOFT” string. There is an article about it here. It is definitely worth a read: http://www.os2museum.com/wp/mtswslnk/