With vs. direct

JavaScript performance comparison

Test case created by Linus Unnebäck

Preparation code

<div id="test"></div>

Preparation code output

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Testing in unknown unknown
Test Ops/sec
With
with(document.getElementById('test').style) {
  backgroundColor = 'blue';
  textAlign = 'center';
  border = '1px solid black';
}
pending…
Direct access
s = document.getElementById('test').style;
s.backgroundColor = 'blue';
s.textAlign = 'center';
s.border = '1px solid black';
 
pending…

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