Run results for: JSON.parse vs String.substring for fetching one value

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36

Browser: Chrome 131

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

String.substring

190.2M/s

JSON.parse()

2.0M/s

View exact numbers

Test name	Executions per second
✓ String.substring	190,171,232 Ops/sec
JSON.parse()	2,022,834 Ops/sec

Script Preparation code:

var ob = `{"aenderungen":[],"_id":"64c0fc4abd2c8bd76c9553f2","name":"Maxis","geburtsdatum":"2023-08-02T00:00:00.000Z","ICD10Code":"k k k k k ","position":0,"empfangsdatum":"2023-07-26T10:58:18.716Z","hinzugefügtVon":"6498bf3b2afb897aa26d18e6","infos":{"berichte":"ggg","puls":"hallo yazn "},"positionarr":[0,0],"stationen":[],"__v":0}`

Tests:

JSON.parse()
var value = JSON.parse(ob)._id;
String.substring
const value = ob.substring(25,49);

Run results for: JSON.parse vs String.substring for fetching one value

is it faster to get one value by JSON.parse() or directly via String.substring

JSON.parse()

String.substring