Try/Catch Error Perf

JavaScript performance comparison

Revision 31 of this test case created by db48x

Preparation code

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

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

function ifCheckExists(undef) {
    if (undef) {
      return undef.prop;
    } else {
      return null;
    }
  }

function ifCheckTernary(undef) {
    return undef ? undef.prop :null;
  }

function ifCheckShortCircuit(undef) {
    return undef && undef.prop;
}
</script>

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Testing in unknown unknown
Test Ops/sec
Try Catch
tryCatch();
pending…
If Undefined Check
ifUndefinedCheck();
pending…
If Typeof Check
ifTypeofCheck();
pending…
If Exists Check
ifCheckExists();
pending…
Ternary Check
ifCheckTernary();
pending…
Short-Circuit Test
ifCheckShortCircuit();
pending…

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