MeasureThat.net

Run results for: replace vs substring vs slice from beginning (+ brackets, substr, compiled vs inline regex)

Test the performance of replace() vs substring() vs slice() when replacing a char at the beginning of a (in this case uri query-)string that may or may not be there. Added the combined brackets[ ] + substr() method, since it's always the first char we wan't to pop off. Inspired by https://jsperf.com/replace-or-substr. Note: could not get 'let' and 'const' to work. Well, too bad...

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Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.0.3 Safari/605.1.15
Safari 14
Mac OS X 10.15.7
Desktop
3 years ago
Test name Executions per second
substring and substring 2732295.8 Ops/sec
replace inline regex 3336240.5 Ops/sec
replace compiled regex var 2911347.2 Ops/sec
brackets and substring 2772727.2 Ops/sec
brackets and slice 2998258.2 Ops/sec
substring and slice 3057250.0 Ops/sec
brackets and substr (legacy) 3004740.5 Ops/sec
substr and substr (legacy) 2737931.0 Ops/sec
Script Preparation code:
Tests:

  • substring and substring

  • replace inline regex

  • replace compiled regex var

  • brackets and substring

  • brackets and slice

  • substring and slice

  • brackets and substr (legacy)

  • substr and substr (legacy)

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