Try/Catch Error Perf

JavaScript performance comparison

Revision 22 of this test case created by Ben Gillies

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;
    }
  }
  function ifTypeCheck(undef) {
    if (typeof(undef) !== 'undefined') {
      return undef.prop;
    } else {
      return null;
    }
  }

  function andOrCheck(undef) {
    return undef && undef.prop || null;
  }
</script>

Test runner

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Testing in unknown unknown
Test Ops/sec
Try Catch
tryCatch(Object);
tryCatch();
pending…
If Check
ifCheck(Object);
ifCheck();
pending…
If type Check
ifTypeCheck(Object);
ifTypeCheck();
pending…
And Or Check
andOrCheck(Object);
andOrCheck();
pending…

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Revisions

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