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Run results for: querySelector vs querySelectorAll vs getElementsByClassName vs querySelector (ID) vs getElementsByID

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Run details:
Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/81.0.4044.138 Safari/537.36 OPR/68.0.3618.206
Opera 68
Windows
Desktop
2 years ago
Test name Executions per second
querySelector 2840223.0 Ops/sec
querySelectorAll 1204770.0 Ops/sec
getElementsByClassName 3287365.0 Ops/sec
querySelector (ID) 2014137.0 Ops/sec
getElementsByID 3541969.0 Ops/sec
Website performance monitoring
HTML Preparation code:
Tests:

  • querySelector

  • querySelectorAll

  • getElementsByClassName

  • querySelector (ID)

  • getElementsByID