Run results for: string split vs indexOf iteration

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/138.0.0.0 Safari/537.36 Edg/138.0.0.0

Browser: Chrome 138

Operating system: Windows

Device Platform: Desktop

Date tested: 9 months ago

Test name	Executions per second
split	22.0 Ops/sec
indexOf walk	130.2 Ops/sec

Script Preparation code:

var str = "123 ".repeat(1000000)

Tests:

split
var split = str.split(" ") var count = 0; for (const s of split) count++;
indexOf walk
var count = 0; var i = 0; while (i >= 0) { count++; i = str.indexOf(" ", i + 1); }