sub perl_mod { 
  for my $z (1..10_000) { 
    $_[0] % 2; 
  } 
} 
 
sub perl_and { 
  for my $z (1..10_000) { 
    $_[0] & 1; 
  } 
} 
 
timethese(10_000, { 
                       perl_mod => sub { perl_mod($num) }, 
                       perl_and => sub { perl_and($num) }, 
                      }); 

##</code><code>##

nicholas(/5)@neko [106 /<1>nicholas/tmp] > ./time
Benchmark: timing 10000 iterations of perl_and, perl_mod...
  perl_and: 210 wallclock secs (209.32 usr +  0.79 sys = 210.11 CPU)
  perl_mod: 260 wallclock secs (258.62 usr +  0.93 sys = 259.55 CPU)
nicholas(/5)@neko [107 /<1>nicholas/tmp] > 

##</code><code>##

#include <stdio.h>

void c_and(int i) {
  int a;
  for (a=0;a<10000;a++) {
    i & 1;
  }
}
void c_mod(int i) {
  int a;
  for (a=0;a<10000;a++) {
    i % 2;
  }
}

int main(void) {
  int a;
  for (a=0;a<100000;a++) {
    c_and(a);
  }
  //for (a=0;a<100000;a++) {
  //  c_mod(a);
  //}
  exit(0);
}

##</code><code>##

For c_and:
29.800u 0.040s 0:29.84 100.0%   0+0k 0+0io 69pf+0w

##</code><code>##

for c_mod:
29.540u 0.390s 0:29.99 99.7%    0+0k 0+0io 69pf+0w