Run results for: match vs for loop

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/125.0.0.0 Safari/537.36

Browser: Chrome 125

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

match counter

1.6M/s

for loop

477K/s

View exact numbers

Test name	Executions per second
✓ match counter	1,589,440 Ops/sec
for loop	477,065 Ops/sec

Script Preparation code:

var testString = "98n1s fjodn fsdnfjsdnfdsj sffJNFAJDNFIJNDFJDd fbdh fkbDKHF23"

function loopCounter(str) {
    let counter = 0
    for (const char of str)
        if (char.toLowerCase() !== char.toUpperCase() && char.toLowerCase() === char)
            counter++
    return counter
}
function matchCounter(str) {
    return (str.match(/[a-z]/g) || []).length
}

Tests:

for loop
loopCounter(testString)
match counter
matchCounter(testString)