Slice vs Substr vs Substring vs [ ] Methods

JavaScript performance comparison

Revision 38 of this test case created by

Preparation code


      
      <script>
Benchmark.prototype.setup = function() {
  var longString = "",
      word = "",
      length,
      offset,
      start,
      end,
      i;
  
  for (i = 0; i < 10000; i++) {
      longString += i % 10;
  }
  
  length = longString.length;
  start = offset = Math.floor(length / 4);
  end = length - offset;
  
  length = end - start;

};
</script>

Test runner

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Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
Substring (long)
longString.substring(start, end);
pending…
Slice (long)
longString.slice(start, end);
pending…
Substr (long)
longString.substr(start, length);
pending…
[ ] (long)
for (i = start; i < length; i += 1) {
    word += longString[i];
}
pending…
charAt (long)
for (i = start; i < length; i += 1) {
    word += longString.charAt(i);
}
pending…

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