delete vs undefined vs null
JavaScript performance comparison
Preparation code
<script>
Benchmark.prototype.setup = function() {
var o = {
p: 1
};
};
</script>
Test runner
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Java applet disabled.
Test | Ops/sec | |
---|---|---|
delete object.property
|
|
pending… |
delete object["property"]
|
|
pending… |
object.property = false
|
|
pending… |
object["property"] = false
|
|
pending… |
object.property = null
|
|
pending… |
object.property = undefined
|
|
pending… |
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