Run results for: typeof boolean vs === true || === false

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:141.0) Gecko/20100101 Firefox/141.0

Browser: Firefox 141

Operating system: Linux

Device Platform: Desktop

Date tested: 7 months ago

Test name	Executions per second
typeof value === "boolean"	44538.9 Ops/sec
value === true \|\| value === false	26335.4 Ops/sec

Script Preparation code:

var values = Array.from({length: 10000}, (_, i) => i % 5 === 0 ? i % 3 === 0 : i % 2 ? i.toString() : i);

Tests:

typeof value === "boolean"
let bools = 0; for (let i = 0; i < values.length; i++) { const value = values[i]; if (typeof value === "boolean") { bools++; } }
value === true || value === false
let bools = 0; for (let i = 0; i < values.length; i++) { const value = values[i]; if (value === true || value === false) { bools++; } }