Try/Catch Error Perf

JavaScript performance comparison

Revision 48 of this test case created by bam and last updated

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 autoVivi(undef) {
    return (undef || {}).prop
  }

  var zombieVivi = (function() {
    var def = {prop:null};
    return function(undef) {
      return (undef || def).prop;
    };
  })();

  function shx(a){return (a!==undefined)?a.prop:null};

  function sh(a){ return a ? a.prop : null; };
</script>

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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…
autovivifivcation
autoVivi(Object)
autoVivi()
pending…
shx
shx(Object)
shx()
pending…
zombieVivi
zombieVivi(Object);
zombieVivi();
pending…
sh
sh(Object);
sh();
pending…

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Revisions

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