Run results for: Merge+object.keys vs set vs for

Run details:

User agent: Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Mobile Safari/537.36

Browser: Chrome Mobile 130

Operating system: Android

Device Platform: Mobile

Date tested: 6 months ago

Script Preparation code:

const a = { a: 1, b: 2 };
const b = { b: 3, c: 4 };

AخA
 
const a = { a: 1, b: 2 };const b = { b: 3, c: 4 };

Tests:

const s = new Set([
  ...Object.keys(a),
  ...Object.keys(b),
 ]);

const res = Array.from(s);

​x
 
const s = new Set([  ...Object.keys(a),  ...Object.keys(b), ]);​const res = Array.from(s);

const c = { ...a, ...b };
const res = Object.keys(c);

 
const c = { ...a, ...b };const res = Object.keys(c);

const s = new Set();
for(const x in a) s.add(x);
for(const x in b) s.add(x);
const res = Array.from(s);

 
const s = new Set();for(const x in a) s.add(x);for(const x in b) s.add(x);const res = Array.from(s);