wrapped in try

JavaScript performance comparison

Test case created by Xotic750

Preparation code

<script>
  var s = "abcd";
</script>

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Testing in unknown unknown
Test Ops/sec
with
try {
  return s.indexOf("a") !== -1;
} catch (e) {}
pending…
without
return s.indexOf("a") !== -1;
pending…
with pre check
if (s !== undefined) {
  return s.indexOf("a") !== -1;
}

return false;
pending…
logic
return s !== undefined && s.indexOf("a") !== -1;
pending…

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