Run results for: Generator - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.6 Safari/605.1.15

Browser: Safari 17

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

ES6 generator

206K/s

Closure polyfill

185K/s

View exact numbers

Test name	Executions per second
✓ ES6 generator	206,028 Ops/sec
Closure polyfill	185,322 Ops/sec

Script Preparation code:

function* createGenerator() {
  var i;
  for (i = 0; i < 100; i++) {
    yield i;
  }
}

function createClosure() {
  var i = 0;
  return {
    next() {
      var result;
      if (i < 100) {
        result = {
          value: i,
          done: false
        };
      } else {
        result = {
          value: undefined,
          done: true
        };
      }
      i++;
      return result;
    }
  };
}

Tests:

ES6 generator
var gen = createGenerator(), result; while (!(result = gen.next()).done) { window.result = result.value; }
Closure polyfill
var gen = createClosure(), result; while (!(result = gen.next()).done) { window.result = result.value; }