Run results for: True vs bitfield

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:48.0) Gecko/20100101 Firefox/48.0

Browser: Firefox 48

Operating system: Windows

Device Platform: Other

Date tested: 7 years ago

Test name	Executions per second
Bitfield	264101.0 Ops/sec
True	274428.1 Ops/sec

Tests:

Bitfield
const READONLY = 1 << 0; class File { 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); } }
True
const READONLY = 1 << 0; class File { constructor() { this._readonly = false; } isReadOnly() { // Parentheses are required. return this._readonly; } setReadOnly() { this._readonly = true; } unsetReadOnly() { this._readonly = false; } }