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

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Run details:
Mozilla/5.0 (Windows NT 5.1; rv:52.0) Gecko/20100101 Firefox/52.0
Firefox 52
Windows XP
Desktop
2 years ago
getElementsByClassName
17.9M/s
getElementsByID
17.9M/s
querySelector (ID)
2.1M/s
querySelector
2.1M/s
querySelectorAll
548K/s
View exact numbers
Test name Executions per second
✓ getElementsByClassName 17,944,152 Ops/sec
getElementsByID 17,867,802 Ops/sec
querySelector (ID) 2,135,934 Ops/sec
querySelector 2,087,049 Ops/sec
querySelectorAll 547,849 Ops/sec
HTML Preparation code:
Tests: