floor(x/16) vs x&$ff0

Benchmark created on

Preparation HTML

<script>
var foo=64;
var bar=68;
var hey=68.5;
</script>

Test runner

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Testing in
TestOps/sec
floor(x/16)
for (var i = 0, j = 100000; i < j; i += 1) {
 result = 16*Math.floor(foo/16);
 result = 16*Math.floor(bar/16);
 result = 16*Math.floor(hey/16);
}
ready
~~(x/16)
for (var i = 0, j = 100000; i < j; i += 1) {
 result = 16*(~~(foo/16));
 result = 16*(~~(bar/16));
 result = 16*(~~(hey/16));
}
ready
x&$ff0
for (var i = 0, j = 100000; i < j; i += 1) {
 result = foo&0xff0;
 result = bar&0xff0;
 result = hey&0xff0;
}
ready

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