Run results for: custom vs regex

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.122 Safari/537.36

Browser: Chrome 80

Operating system: Linux

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
custom	24913.2 Ops/sec
regex	150346.7 Ops/sec
simple	4655949.0 Ops/sec
regex 2	122357.2 Ops/sec
custom 2	59201.7 Ops/sec

Tests:

custom
const lookup = { "0": 0, "1": 0, "2": 0, "3": 0, "4": 0, "5": 0, "6": 0, "7": 0, "8": 0, "9": 0, A: 0, B: 0, C: 0, D: 0, E: 0, F: 0, G: 0, H: 0, I: 0, J: 0, K: 0, L: 0, M: 0, N: 0, O: 0, P: 0, Q: 0, R: 0, S: 0, T: 0, U: 0, V: 0, W: 0, X: 0, Y: 0, Z: 0, a: 0, b: 0, c: 0, d: 0, e: 0, f: 0, g: 0, h: 0, i: 0, j: 0, k: 0, l: 0, m: 0, n: 0, o: 0, p: 0, q: 0, r: 0, s: 0, t: 0, u: 0, v: 0, w: 0, x: 0, y: 0, z: 0 }; const str = "Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum."; let count = 0; for (var i = 0; i < str.length; ++i) { count += lookup[str[i]] === 0 ? 0 : 1; }
regex
const str = "Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum."; var matches = str.match(/[\w\d\’\'-]+/gi); matches ? matches.length : 0;
simple
const str = "Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum."; str.split(" ").length
regex 2
const str = "Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum."; var regEx = /([^\u0000-\u007F]|\w)+/g; str.match(regEx).length;
custom 2
const lookup = { " ": 1 }; const str = "Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum."; let count = 0; for (var i = 0; i < str.length; ++i) { count += lookup[str[i]]; }

Run results for: custom vs regex

custom

regex

simple

regex 2

custom 2