Run results for: ToLower vs ToUpper w/ Find vs Some

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.159 Safari/537.36

Browser: Chrome 92

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
ToUpper w/ Some	3985.2 Ops/sec
ToLower w/ Some	12037.2 Ops/sec
ToLower w/ Find	12057.4 Ops/sec
ToUpper w/ Find	4023.8 Ops/sec

Script Preparation code:

var data = []

for (let i = 0; i < 5000; ++i) data.push('TOTO')
data.push('titi')
data.push('TITI')
for (let i = 0; i < 2500; ++i) data.push('toto')

Tests:

ToUpper w/ Some
data.some(d => { const trnsfrm = d.toUpperCase(); return trnsfrm === 'tOtO' || trnsfrm === 'ToTo'; })
ToLower w/ Some
data.some(d => { const trnsfrm = d.toLowerCase(); return trnsfrm === 'tOtO' || trnsfrm === 'ToTo'; })
ToLower w/ Find
data.find(d => { const trnsfrm = d.toLowerCase(); return trnsfrm === 'tOtO' || trnsfrm === 'ToTo'; })
ToUpper w/ Find
data.find(d => { const trnsfrm = d.toUpperCase(); return trnsfrm === 'tOtO' || trnsfrm === 'ToTo'; })

Run results for: ToLower vs ToUpper w/ Find vs Some

ToUpper w/ Some

ToLower w/ Some

ToLower w/ Find

ToUpper w/ Find