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Run results for:
Javascript: Case insensitive string comparison performance
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Run details:
User agent:
Mozilla/5.0 (iPhone; CPU iPhone OS 18_7 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/26.3 Mobile/15E148 Safari/604.1
Browser:
Mobile Safari 26
Operating system:
iOS 18.7
Device Platform:
Mobile
Date tested:
2 months ago
Test name
Executions per second
toLowerCase()
284492544.0 Ops/sec
localeCompare()
198610.0 Ops/sec
toLowerCase() FAIL
252288192.0 Ops/sec
localeCompare() FAIL
176212.4 Ops/sec
Script Preparation code:
var a = "John Doe" var b = "john doe" var c = "john smith" var o = { sensitivity: 'base' }
Tests:
toLowerCase()
a.toLowerCase() === b.toLowerCase()
localeCompare()
a.localeCompare(b,undefined,o)
toLowerCase() FAIL
c.toLowerCase() === b.toLowerCase()
localeCompare() FAIL
c.localeCompare(b,undefined,o)