Run results for: Functional Match vs Switch

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 12_3_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/12.1.1 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 12

Operating system: iOS 12.3.1

Device Platform: Mobile

Date tested: 5 years ago

Test name	Executions per second
Functional Match	370201.2 Ops/sec
Switch	463090.3 Ops/sec

Script Preparation code:

var str = 'abc';
str = str.charAt(Math.floor(Math.random() * 3));

Tests:

Functional Match
const match = x => { const matched = x => ({ on: () => matched(x), otherwise: () => x, }); return { on: (pred, fn) => ( pred(x) ? matched(fn(x)) : match(x) ), otherwise: fn => fn(x), }; } match(str) .on(x => x === 'a', () => console.log('A')) .on(x => x === 'b', () => console.log('B')) .on(x => x === 'c', () => console.log('C')) .otherwise(() => console.log('default'));
Switch
switch (str) { case 'a': console.log('A'); break; case 'b': console.log('B'); break; case 'c': console.log('C'); break; }