gistfile1.txt

root@luke:~/tmpfs# rm tmp 
root@luke:~/tmpfs# time ../a.out > tmp; ls -sl tmp

real	0m0.089s
user	0m0.068s
sys	0m0.020s
39148 -rw-r--r-- 1 root root 40000000 Nov  3 09:59 tmp
root@luke:~/tmpfs# cat ../foo.c 
#include <stdlib.h>

int main(void) {
	int i;
	long int a;
	char *b;
	char buff[100010];
	int buflen=0;
	int intcounter;
	srandom(time(NULL));
	b = (char *) &a;
	for (i=0;i < (40000000 / sizeof(long int));i++) {
		a = random();
		for (intcounter=0; intcounter<sizeof(long int); intcounter++)
			buff[buflen+intcounter] = b[intcounter];
		buflen+=intcounter;

		if (buflen > 100000){
			write(1,buff,buflen);
			buflen=0;
		}
	}
	write(1,buff,buflen);
	return 0;
}