regexp vs charCode

Benchmark created on

Setup

let reg = /^[\dA-Z]+$/;

function isDigitOrUppercase(string) {
	for (let j = 0; j < string.length; j++) {
		let isDigit = string.charCodeAt(j) >= 48 && string.charCodeAt(j) <= 57;
		let isUpperCase =
			string.charCodeAt(j) >= 65 && string.charCodeAt(j) <= 90;
		if (!isDigit && !isUpperCase) return false;
	}

	return true;
}

function testWithReg(string) {
    string.match(reg);
}

function testWithCharCode(string) {
    isDigitOrUppercase(string);
}

Test runner

Ready to run.

Testing in
TestOps/sec
With RegExp (worst case)
testWithReg("FOO")
ready
With CharCode (worst case)
testWithCharCode("FOO")
ready
With RegExp (best case)
testWithReg("foo")
ready
With CharCode (best case)
testWithCharCode("foo")
ready

Revisions

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