Run results for: Javascript: Case insensitive string comparison performance

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 15_5 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/103.0.5060.63 Mobile/15E148 Safari/604.1

Browser: Chrome Mobile iOS 103

Operating system: iOS 15.5

Device Platform: Mobile

Date tested: 2 years ago

Test name	Executions per second
toLowerCase()	8558326.0 Ops/sec
localeCompare()	210393.6 Ops/sec
toLowerCase() FAIL	11526150.0 Ops/sec
localeCompare() FAIL	205602.4 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)

Run results for: Javascript: Case insensitive string comparison performance

toLowerCase()

localeCompare()

toLowerCase() FAIL

localeCompare() FAIL