Run results for: array.IndexOf vs new Set.has

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36

Browser: Chrome 126

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
withIndexOf	9474.0 Ops/sec
withSetHas	19.2 Ops/sec

Script Preparation code:

const arr = [];

for (let i = 0; i < 1000000; ++i) {
  arr.push(i);
}

function withIndexOf(num) {
  return arr.indexOf(num) !== -1;
}

function withSetHas(num) {
  const set = new Set(arr);
  return set.has(num);
}

Tests:

withIndexOf
withIndexOf(999999);
withSetHas
withSetHas(999999);

Run results for: array.IndexOf vs new Set.has

array.indexOf vs new Set.has

withIndexOf

withSetHas