Sieve of Eratosthenes

gistfile1.js

var input = process.env.INPUT || 2;
 
var sieve = function(upperBound) {
  var boolArray = new ArrayBuffer(upperBound);
  var i, j;
  for (i = 2; i < (Math.sqrt(upperBound))|0; i++) {
    if (boolArray[i] === 0) {
      for (j = 0; (i*2 + j*i) < upperBound; j++) {
        boolArray[(i*2 + j*i)] = 1;
      }
    }
  }
  // for (i = 2; i < upperBound; i++) {
  //   if (boolArray[i] === 0) {
  //     process.stdout.write(i+" ");
  //   }
  // }
  // process.stdout.write("\n");
};
 
console.time("sieve");
sieve(input);
console.timeEnd("sieve");