Run results for: Array of strings | Some vs Includes (+ spread)

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/139.0.0.0 Safari/537.36

Browser: Chrome 139

Operating system: Linux

Device Platform: Desktop

Date tested: 11 months ago

Some

24.2M/s

Includes

20.4M/s

Includes + spread (when TypeScript readonly)

16.7M/s

View exact numbers

Test name	Executions per second
✓ Some	24,240,238 Ops/sec
Includes	20,410,406 Ops/sec
Includes + spread (when TypeScript readonly)	16,681,489 Ops/sec

Script Preparation code:

// Preparation: create an array of 10 string values
const values = [
  "alpha", "bravo", "charlie", "delta", "echo",
  "foxtrot", "golf", "hotel", "india", "juliet"
];

// Function to pick a random string from the array
function getRandomValue() {
  const index = Math.floor(Math.random() * values.length);
  return values[index];
}

Tests:

Some
const target = getRandomValue(); const found = values.some(v => v === target);
Includes
const target = getRandomValue(); const found = values.includes(target);
Includes + spread (when TypeScript readonly)
const target = getRandomValue(); const found = [...values].includes(target);