data vs variable

JavaScript performance comparison

Test case created

Preparation code

<script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
 
<script>
Benchmark.prototype.setup = function() {
    var select2Lastpos = {x: 0, y: 0};
};

Benchmark.prototype.teardown = function() {
    select2Lastpos.x += 1
};
</script>

Preparation code output

Test runner

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Testing in unknown unknown
Test Ops/sec
data
$.data(document, "select2-lastpos", {x: 42, y: 42});
pending…
var
select2Lastpos = {x: 42, y: 42};
pending…

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