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; rv:89.0) Gecko/20100101 Firefox/89.0
Firefox 89
Mac OS X 10.15
Desktop
3 years ago
Test name Executions per second
substring and substring 21896774.0 Ops/sec
replace inline regex 14101468.0 Ops/sec
replace compiled regex var 15340113.0 Ops/sec
brackets and substring 50433156.0 Ops/sec
brackets and slice 55660420.0 Ops/sec
substring and slice 22413970.0 Ops/sec
brackets and substr (legacy) 51074528.0 Ops/sec
substr and substr (legacy) 22547262.0 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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