Run results for: String compares (sensitive & insensitive & undefined)

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/105.0.0.0 Safari/537.36

Browser: Chrome 105

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
LowerCase compare a&b	8036330.0 Ops/sec
Collator compare	3277210.0 Ops/sec
UpperCase compare	7423636.0 Ops/sec
Sensitive compare	9373343.0 Ops/sec
Lower a & c	8028903.0 Ops/sec
Lower a & d	8074987.0 Ops/sec
Undefined test & lower a&b	4329967.0 Ops/sec

Script Preparation code:

var a = 'aBcD eFgH iJkLmN'
var b = 'AbCd eFgH iJkLmN'
var c = 'aBcD eFgH iJkLmNx'
var d = 'aBcD eFgH iJkLmn'

var enCollator = new Intl.Collator('en', { sensitivity: 'accent' });

Tests:

LowerCase compare a&b
a.toLowerCase() === b.toLowerCase()
Collator compare
enCollator.compare(a, b) === 0
UpperCase compare
a.toUpperCase() === b.toUpperCase()
Sensitive compare
a === b
Lower a & c
a.toLowerCase() === c.toLowerCase()
Lower a & d
a.toLowerCase() === d.toLowerCase()
Undefined test & lower a&b
!!(a && b && a.toLowerCase() === b.toLowerCase())

Run results for: String compares (sensitive & insensitive & undefined)

LowerCase compare a&b

Collator compare

UpperCase compare

Sensitive compare

Lower a & c

Lower a & d

Undefined test & lower a&b