Try/Catch Cost In a Loop

JavaScript performance comparison

Revision 12 of this test case created by Yohan Siguret

Preparation code 


      
      <script>

        Benchmark.prototype.setup = function() {

          
  var obj = { a : 1, b : 2, c : 3, d : 4, e : 5 };

        
  };


      
</script>

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Testing in archive.org_bot 0.0.0 / Other 0.0.0
Test Ops/sec
Iteration with internal try/catch 
var blah = '';
for (var prop in obj) {
  try {
    blah += obj[prop];
  } catch (e) {
    console.log(' ');
  }
}
 pending…
Vanilla iteration 
var blah = '';
for (var prop in obj) {
  blah += obj[prop];
}
 pending…

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