padding with memoization
JavaScript performance comparison
Test case created
Info
Comparing the performance of storing the string in a temporary variable.
Preparation code
<script>
Benchmark.prototype.setup = function() {
var input = [0, "000", 1, 5, 99, 100, 200.23, 789, 2000, "2912", 12345, "88888", 999999];
function runner(func) {
for (var i = 0; i < input.length; i++) {
for (var l = 0; l < 10; l++) {
func(input[i], '0', l);
}
}
}
};
</script>
Test runner
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Java applet disabled.
Testing in unknown unknown
| Test |
Ops/sec |
repeated - original |
runner(function (toPad, padChar, length) {
return (String(toPad).length < length) ? new Array(length - String(toPad).length + 1).join(padChar) + String(toPad) : toPad;
});
|
pending… |
memoization - original |
runner(function (toPad, padChar, length) {
var s = String(toPad);
return (s.length < length) ? new Array(length - s.length + 1).join(padChar) + s : toPad;
});
|
pending… |
repeat - no news |
runner(function (toPad, padChar, length) {
return (String(toPad).length < length) ? Array(length - String(toPad).length + 1).join(padChar) + String(toPad) : toPad;
});
|
pending… |
memoization - no news |
runner(function (toPad, padChar, length) {
var s = String(toPad);
return (s.length < length) ? Array(length - s.length + 1).join(padChar) + s : toPad;
});
|
pending… |
repeat - new |
runner(function (toPad, padChar, length) {
return (new String(toPad).length < length) ? new Array(length - new String(toPad).length + 1).join(padChar) + new String(toPad) : toPad;
});
|
pending… |
memoization - new |
runner(function (toPad, padChar, length) {
var s = new String(toPad);
return (s.length < length) ? new Array(length - s.length + 1).join(padChar) + s : toPad;
});
|
pending… |
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