Run results for: intersect v3

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/125.0.0.0 Safari/537.36 Edg/125.0.0.0

Browser: Chrome 125

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

238/s

198/s

9/s

View exact numbers

Test name	Executions per second
✓ c	238 Ops/sec
b	198 Ops/sec
a	9 Ops/sec

Script Preparation code:

Array.prototype.shuffle = function() {
  let m = this.length, i;
  while (m) {
    i = (Math.random() * m--) >>> 0;
    [this[m], this[i]] = [this[i], this[m]]
  }
  return this;
};

var watched = [];
for(let i = 0; i < 100000; i++){watched.push({programId:Math.random()});}

var ignored = [...watched];
ignored.shuffle();
ignored = ignored.slice(50000, 51000);

Tests:

a
watched.filter(wObj => { return !ignored.some((iObj, ndx) => { return iObj.programId === wObj.programId; }); });
b
watched.filter(wObj => !ignored.some((iObj, ndx) => { if (iObj.programId === wObj.programId) { ignored[ndx].programId = ignored.pop().programId; return true; } return false; }) );
c
var setA = new Set(watched); var setB = new Set(ignored); var intersection = new Set([...setA].filter(x => setB.has(x))); return Array.from(intersection);