MeasureThat.net

Run results for: index vs lastindexof (for right biased values)

Test if lastIndexOf actually performs better when the search term is expected to be near the end.

Go to the benchmark
Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.110 Safari/537.36
Chrome 96
Mac OS X 10.15.7
Desktop
2 years ago
Test name Executions per second
lastIndexOf (near end) 1128279.6 Ops/sec
indexOf (near end) 26629614.0 Ops/sec
lastIndexOf (near head) 32497.6 Ops/sec
indexOf (near head) 26699838.0 Ops/sec
Script Preparation code:
Tests:

  • lastIndexOf (near end)

  • indexOf (near end)

  • lastIndexOf (near head)

  • indexOf (near head)