Run results for: TextDecoder('utf-16') vs String.fromCharCode

Run details:

User agent: Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Mobile Safari/537.36

Browser: Chrome Mobile 130

Operating system: Android

Device Platform: Mobile

Date tested: one year ago

String.fromCharCode

2.3M/s

TextDecoder

1.3M/s

View exact numbers

Test name	Executions per second
✓ String.fromCharCode	2,336,611 Ops/sec
TextDecoder	1,281,925 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('utf-16');

Tests:

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