output.log

Below results use latest iojs v1.x branch and node v0.11 branch.


$ /usr/bin/time iojs primality-test.js 
13.01user 0.16system 0:13.16elapsed 100%CPU (0avgtext+0avgdata 682960maxresident)k
0inputs+0outputs (0major+45067minor)pagefaults 0swaps


$ /usr/bin/time node primality-test.js 
3.05user 0.20system 0:03.25elapsed 100%CPU (0avgtext+0avgdata 871784maxresident)k
0inputs+0outputs (0major+45572minor)pagefaults 0swaps

primality-test.js

function Sieve(maxNum) {
  var i, j;
  var data = new Array();

  for (i = 0; i < maxNum; i++) {
    data[i] = 1;
  }

  for (i = 2; i <= maxNum; i++) {
    if (data[i]) {
      for (j = i + i; j <= maxNum; j += i)
        data[j] = 0;
    }
  }

  return data;
}

for (var i = 0; i < 1e1; i++)
  Sieve(1e7);