array concat

JavaScript performance comparison

Test case created

Preparation code

<script>
  var colors = ['red', 'green', 'blue'];
</script>

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Testing in unknown unknown
Test Ops/sec
concat exponentially
while (colors.length < 9)
colors = colors.concat(colors);
colors;
pending…
append colors
var l = colors.length;
for (i = l; i < Math.round(9 / l) * l; i++)
colors[i] = colors[i % l];
colors;
pending…
add array x times
var arr = [];
for (i = 0; i < Math.round(9 / colors.length); i++)
arr = arr.concat(colors);
colors.append(arr);
pending…

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