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mhowlett/speedtest.js

Created February 17, 2016 18:01
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test for array vs object allocation speed / heap sizes
Raw
speedtest.js
<html>
<script type="text/javascript">
var testObj = function() {
var a = [];
var i = 0;
for (; i<10000000; ++i) {
a.push({
time: Math.random(),
value: Math.random()
});
}
console.log(a.length);
}
var testArray = function() {
var a = [];
var b = [];
var i = 0;
for (; i<10000000; ++i) {
a.push(Math.random());
b.push(Math.random());
}
console.log(a.length, b.length);
}
</script>
<body>
<button onclick="testObj();">test object</button>
<button onclick="testArray();">test array</button>
</body>
</html>
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