Run results for: True vs bitfield

Run details:

User agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.116 Safari/537.36

Browser: Chrome 52

Operating system: Windows 7

Device Platform: Other

Date tested: 7 years ago

Test name	Executions per second
Bitfield	54976.0 Ops/sec
True	55457.0 Ops/sec

Tests:

Bitfield
const READONLY = 1 << 0; class FileBit { constructor() { this._bitField = 0; } isReadOnly() { // Parentheses are required. return (this._bitField & READONLY) !== 0; } setReadOnly() { this._bitField = this._bitField | READONLY; } unsetReadOnly() { this._bitField = this._bitField & (~READONLY); } } var ft = new FileBit; ft.isReadOnly() === true; ft.setReadOnly(); ft.unsetReadOnly(); ft.isReadOnly() === false;
True
class FileBool { constructor() { this._readonly = false; } isReadOnly() { // Parentheses are required. return this._readonly; } setReadOnly() { this._readonly = true; } unsetReadOnly() { this._readonly = false; } } var fb = new FileBool; fb.isReadOnly() === true; fb.setReadOnly(); fb.unsetReadOnly(); fb.isReadOnly() === false;