Slice vs Substr vs Substring vs [ ] Methods

JavaScript performance comparison

Revision 30 of this test case created

Info

This is comparing the runtimes of [ ], substr, substring, and slice in a string for large (10000 character) string size.

Preparation code

<script type="text/javascript">
  var longString = "";
  // Large = 10,000
  for (var i = 0; i < 10000; i++) {
        longString += i % 10;
  }
</script>

Test runner

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Testing in unknown unknown
Test Ops/sec
Substring (long)
 longString.substring(1);
pending…
Slice (long)
longString.slice(1);
pending…
Substr (long)
longString.substr(1);
pending…

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