Run results for: To Formatted Number

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.124 Safari/537.36 Edg/91.0.864.64

Browser: Chrome 91

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
function cb	5275.7 Ops/sec
arrow	489142.1 Ops/sec

Script Preparation code:


var arr = ['a', 10000, 100.123, "1000", "1,123.123", "", undefined];

Tests:

function cb
function formattedNumber(n = 0) { let num = n; if (typeof num === "string") { num = Number(num.replace(",", "")); if (isNaN(num)) { // return the original string if not a valid number return n; } } return num.toLocaleString("en-US", { maximumFractionDigits: 4 }); } arr.forEach(formattedNumber)
arrow
function formattedNumber(n) { // TODO: consider using toLocaleString if (parseInt(n) === 0) { return "0"; } else { return (n || "").toString().replace(/\B(?=(\d{3})+(?!\d))/g, ","); } } arr.forEach(formattedNumber)