Thread: How do you compare?

I wrote a hackish benchmark program so you can compare your computers to my aging little machine



here's the code

Code:

#include <iostream>
#include <cstring>
#include <ctime>

using namespace std;
int sl;

void inline swt(unsigned char *tp, int x, int y)
{
	char tmp;
	tmp = tp[x];
	tp[x] = tp[y];
	tp[y] = tmp;
}

void inline perm(unsigned char *tp, int pl)
{
	if (pl == sl - 1) {
	//	cout << tp << endl;
	}
	for (int nc = pl; nc < sl; nc++) {
	        swt(tp, pl, nc);
		perm(tp, pl + 1);
	}
}

int main(void)
{
	unsigned char str[] = "nosebleeding";
	double brispeed = 26.8300F;
	double bripercent = brispeed / 100;
	double yourspeed;
	double yourpercent;
	clock_t start, end;

	sl = strlen((const char*)str);
	start = clock();
	perm(str, 0);
	end = clock();

	yourspeed = (double)(end - start) / (double)CLOCKS_PER_SEC;
	yourpercent = yourspeed / bripercent;
	cout << "The program took "
	     << yourspeed
	     << " seconds. That's " << yourpercent << "% of the time "
	     << "Brian's computer took." << endl;

	return 0;
}

note: the lower the percentage the better.

my output:

Code:

bash-2.05b$ ./test
The program took 26.8216 seconds. That's 99.9687% of the time Brian's computer
took.

Code:

Specs:
1.00GHz AMD Athlon
512MB RAM
FreeBSD 4.9
GCC 3.3.3

this will be wildly inaccurate due to compiler optimisations and such, but it's just for fun.