Run results for: Nullish coalescing (??) vs logical OR (||) vs JS Compiled ?? (?:)

Run details:

User agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:134.0) Gecko/20100101 Firefox/134.0

Browser: Firefox 134

Operating system: Ubuntu

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
Nullish coalescing (??)	1339212544.0 Ops/sec
Logical OR (\|\|)	1430232192.0 Ops/sec
Nullish coalescing (??) [short-circuit]	1412465280.0 Ops/sec
Logical OR (\|\|) [short-circuit]	1197798528.0 Ops/sec
JS Compiled ?? (?:)	204545824.0 Ops/sec
JS Compiled ?? (?:) [short-circuit]	308210560.0 Ops/sec

Tests:

Nullish coalescing (??)
let x = null ?? undefined ?? null ?? undefined ?? null ?? undefined ?? null ?? undefined ?? null ?? undefined ?? 1;
Logical OR (||)
let x = null || undefined || null || undefined || null || undefined || null || undefined || null || undefined || 1;
Nullish coalescing (??) [short-circuit]
let x = 1 ?? undefined ?? null ?? undefined ?? null ?? undefined ?? null ?? undefined ?? null ?? undefined ?? 1;
Logical OR (||) [short-circuit]
let x = 1 || undefined || null || undefined || null || undefined || null || undefined || null || undefined || 1;
JS Compiled ?? (?:)
var _a, _b, _c, _d, _e, _f, _g, _h, _j; let x = (_j = (_h = (_g = (_f = (_e = (_d = (_c = (_b = (_a = null !== null && null !== void 0 ? null : undefined) !== null && _a !== void 0 ? _a : null) !== null && _b !== void 0 ? _b : undefined) !== null && _c !== void 0 ? _c : null) !== null && _d !== void 0 ? _d : undefined) !== null && _e !== void 0 ? _e : null) !== null && _f !== void 0 ? _f : undefined) !== null && _g !== void 0 ? _g : null) !== null && _h !== void 0 ? _h : undefined) !== null && _j !== void 0 ? _j : 1;
JS Compiled ?? (?:) [short-circuit]
var _a, _b, _c, _d, _e, _f, _g, _h, _j; let x = (_j = (_h = (_g = (_f = (_e = (_d = (_c = (_b = (_a = 1 !== null && 1 !== void 0 ? 1 : undefined) !== null && _a !== void 0 ? _a : null) !== null && _b !== void 0 ? _b : undefined) !== null && _c !== void 0 ? _c : null) !== null && _d !== void 0 ? _d : undefined) !== null && _e !== void 0 ? _e : null) !== null && _f !== void 0 ? _f : undefined) !== null && _g !== void 0 ? _g : null) !== null && _h !== void 0 ? _h : undefined) !== null && _j !== void 0 ? _j : 1;

Run results for: Nullish coalescing (??) vs logical OR (||) vs JS Compiled ?? (?:)

Nullish coalescing (??)

Logical OR (||)

Nullish coalescing (??) [short-circuit]

Logical OR (||) [short-circuit]

JS Compiled ?? (?:)

JS Compiled ?? (?:) [short-circuit]