Run results for: Set vs POJO

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:53.0) Gecko/20100101 Firefox/53.0

Browser: Firefox 53

Operating system: Linux

Device Platform: Desktop

Date tested: 5 years ago

Test name	Executions per second
POJO	1840440.0 Ops/sec
Set	560793.9 Ops/sec

Script Preparation code:

red = (r, y) => {r[y] = true; return r;}
clone = s => Object.keys(s).reduce(red, {})
set1 = {a: true, b: true, c: true, d: true, e: true};
add1 = x => s => {
  if (s[x]) return s;
  var t = clone(s);
  t[x] = true; 
  return t;
}

set2 = new Set(['a','b','c','d','e'])
add2 = x => s => {
    if (s.has(x)) return s;
    var t = new Set(s);
    t.add(x);
    return t;
}

Tests:

POJO
r1 = add1('aloha')(set1)
Set
r2 = add2('aloha')(set2)