Try/Catch Error Perf

JavaScript performance comparison

Revision 3 of this test case created

Preparation code

<script>
  function tryCatch(undef) {
    try {
      return undef.prop;
    } catch (ex) {
      return null;
    }
  }

  function ifCheck(undef) {
    if (undef !== undefined) {
      return undef.prop;
    } else {
      return null;
    }
  }
</script>

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Testing in unknown unknown
Test Ops/sec
Try Catch
 
tryCatch();
 pending…
If Check
 
ifCheck();
 pending…

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1 comment

Tanguy Le Barzic commented : ∞

Interesting test, although as an error is raised each time in the 'try catch' test, they don't really do the same thing under the hood. It's also interesting to see that even if we don't enter the catch clause, try / catch is still slower, although the difference appears to be less important (http://jsperf.com/trycatch-with-no-error-raised)

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