fac 0.5.4

build tool
Documentation 
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#include <time.h>
#include <stdio.h>

int main(int argc, char ** argv) {
  clock_t ticks = 1*CLOCKS_PER_SEC;
  if (argc == 2) {
    double seconds = 1;
    sscanf(argv[1], "%lg", &seconds);
    ticks = seconds*CLOCKS_PER_SEC;
  }
  printf("Starting timing for %lg seconds...\n", ticks/(double)CLOCKS_PER_SEC);
  double foo = 0;
  while (clock() < ticks) {
    for (int i=0;i<1000000;i++) {
      foo += 1;
    }
  }
  printf("All done spinning! %g\n", foo);
  return 0;
}