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

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/132.0.0.0 Safari/537.36

Browser: Chrome 132

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

String.fromCharCode

3.1M/s

TextDecoder

2.1M/s

View exact numbers

Test name	Executions per second
✓ String.fromCharCode	3,102,089 Ops/sec
TextDecoder	2,119,224 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);