ajax 2 ways

JavaScript performance comparison

Revision 4 of this test case created by Calvin Metcalf

Preparation code


      
      <script>
Benchmark.prototype.setup = function() {
  
  var i = 0;
  function async(cb) {
  var url = '//jsperf.com/_=9'
     var req = new XMLHttpRequest();
      req.onload = function () {
        cb();
      };
      req.open("get", url + (++i), true);
      req.send();
  }
  function sync() {
  var url = '//jsperf.com/_=8'
      var req = new XMLHttpRequest();
  
      req.open("get", url + (++i), false);
      return req.send();
  }
  var result;

};
</script>

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Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
async
// async test
async(function () {
  deferred.resolve();
});
pending…
sync
result = sync();
pending…

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