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Run results for: document.querySelector (from document) vs parent.querySelector (from an element)

Comparing speed of that on a large sample HTML document.

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Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:59.0) Gecko/20100101 Firefox/59.0
Firefox 59
Windows
Other
6 years ago
Test name Executions per second
document.querySelector 218.4 Ops/sec
parent.querySelector 1381047.0 Ops/sec
Website performance monitoring
HTML Preparation code:
Tests:

  • document.querySelector

  • parent.querySelector