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Run results for: querySelector() vs getElementsByClassName()[0] vs getElementById()

Testing query speed of a single element

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Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Safari/537.36
Chrome 69
Mac OS X 10.12.6
Desktop
5 years ago
Test name Executions per second
querySelector 1594499.0 Ops/sec
getElementsByClassName 1240211.0 Ops/sec
getElementById() 1969623.0 Ops/sec
Website performance monitoring
HTML Preparation code:
Tests:

  • querySelector

  • getElementsByClassName

  • getElementById()