Try/Catch Cost In a Loop

JavaScript performance comparison

Revision 4 of this test case created

Info

How much does a try catch cost?

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 unknown unknown
Test Ops/sec
Vanilla iteration
var blah = '';
for (var prop in obj) {
  blah += obj[prop];
}
pending…
Iteration with internal try/catch
var blah = '';
for (var prop in obj) {
  try {
    blah += obj[prop];
  } catch (e) {}
}
pending…
Iteration with external try/catch
var blah = '';
try {
for (var prop in obj) {

    blah += obj[prop];

}
} catch(e) {

}
pending…

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