Run results for: Javascript: Case insensitive string comparison performance

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 14_7_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/15E148 LightSpeed [FBAN/MessengerLiteForiOS;FBAV/332.0.0.45.117;FBBV/321367341;FBDV/iPhone13,1;FBMD/iPhone;FBSN/iOS;FBSV/14.7.1;FBSS/3;FBCR/;FBID/phone;FBLC/pl;FBOP/0]

Browser: Mobile Safari 14

Operating system: iOS 14.7.1

Device Platform: Mobile

Date tested: 3 years ago

Test name	Executions per second
toLowerCase()	6824508.5 Ops/sec
localeCompare()	245159.4 Ops/sec
toLowerCase() FAIL	8836617.0 Ops/sec
localeCompare() FAIL	231886.9 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