Run results for: JSON.parse vs string.split for numbers

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 18_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) GSA/346.1.704810410 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 18

Operating system: iOS 18.1

Device Platform: Mobile

Date tested: one year ago

JSON.parse

3K/s

String.split

2K/s

View exact numbers

Test name	Executions per second
✓ JSON.parse	2,887 Ops/sec
String.split	2,013 Ops/sec

Script Preparation code:

var array = new Array(5000).fill('1').map(() => Math.random());
var strJson = JSON.stringify(array);
var strComma = array.join(',');

Tests:

JSON.parse
JSON.parse(strJson);
String.split
strComma.split(',').map(Number)

Run results for: JSON.parse vs string.split for numbers

This shows that JSON.parse can be faster than str.split

JSON.parse

String.split