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Run results for: char index vs charAt() vs slice() vs startsWith() vs RegExp --

Compare methods for testing string's beggining character.

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Run details:
Mozilla/5.0 (iPhone; CPU iPhone OS 18_3_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.3 Mobile/15E148 Safari/604.1
Mobile Safari 18
iOS 18.3.1
Mobile
one month ago
Test name Executions per second
character index 125030880.0 Ops/sec
charAt() 134074216.0 Ops/sec
startsWith() 59362896.0 Ops/sec
slice() 134225456.0 Ops/sec
RegExp 120779864.0 Ops/sec
Script Preparation code:
Tests:

  • character index

  • charAt()

  • startsWith()

  • slice()

  • RegExp