Run results for: Generator

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:72.0) Gecko/20100101 Firefox/72.0

Browser: Firefox 72

Operating system: Windows

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
ES6 generator	20149.0 Ops/sec
Closure polyfill	29162.5 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; }

ES6 generator

Closure polyfill