Run results for: JSON.Stringify / JSON.Parse vs TextEncoder / TextDecoder

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 18_3_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/136.0.7103.91 Mobile/15E148 Safari/604.1

Browser: Chrome Mobile iOS 136

Operating system: iOS 18.3.1

Device Platform: Mobile

Date tested: one year ago

Benchmark engine: Benchmark.js

JSON.Stringify

22.3M/s

Encode

9.3M/s

JSON.Parse

7.9M/s

Decode

3.7M/s

EncodeInto

0/s

View exact numbers

Test name	Executions per second
✓ JSON.Stringify	22,315,634 Ops/sec
Encode	9,261,811 Ops/sec
JSON.Parse	7,870,151 Ops/sec
Decode	3,687,362 Ops/sec
EncodeInto	0 Ops/sec

Script Preparation code:

var i = 0;
var initialString = "This is the initial Test String";
var encoder = new TextEncoder();
var view = encoder.encode(initialString);
var initialObject = {someString: initialString};
var initialStringify = JSON.stringify(initialObject);

var decoder = new TextDecoder();

Tests:

Encode
var newString = "This is the updated Test String"; var view = encoder.encode(newString); if (i == 5000) console.log(view); i++;
EncodeInto
var newString = "This is the updated Test String"; var view = encoder.encodeInto(newString); if (i == 5000) console.log(view); i++;
JSON.Stringify
var newString = "This is the updated Test String"; var object = {someString: newString}; var stringify = JSON.stringify(object); if (i == 5000) console.log(stringify); i++;
Decode
var decoded = decoder.decode(view); if (i == 5000) console.log(decoded); i++;
JSON.Parse
var parse = JSON.parse(initialStringify) if (i == 5000) console.log(parse);