Run results for: TextDecoder vs String.fromCharCode

Run details:

User agent: Mozilla/5.0 (Android 10; Mobile; rv:128.0) Gecko/128.0 Firefox/128.0

Browser: Firefox Mobile 128

Operating system: Android

Device Platform: Mobile

Date tested: 2 years ago

TextDecoder

1.8M/s

String.fromCharCode

904K/s

View exact numbers

Test name	Executions per second
✓ TextDecoder	1,794,366 Ops/sec
String.fromCharCode	904,353 Ops/sec

Script Preparation code:

var bytes = [84,104,105,115,32,105,115,32,97,32,115,97,109,112,108,101,32,112,97,114,97,103,114,97,112,104,46];
var bufferArray = new Uint16Array(bytes);
var decoder = new TextDecoder(); // default 'utf-8' or 'utf8'

Tests:

String.fromCharCode
String.fromCharCode.apply(null, bufferArray);
TextDecoder
decoder.decode(bufferArray);