Benchmark: Performance of JavaScript .forEach vs for in 2

Script Preparation code:

function generateTestObject() {
  const result = {};
  for (let i = 0; i < 1000; ++i) {
    result['v'+i] = i
  }
  return result;
}

Tests:

Object.entries()
const object = generateTestObject(); Object.entries(object).forEach(([key, value]) => { const test = key + '' + value })
for in
const object = generateTestObject(); for(key in object){ const test = key + '' + object[key] }
for in with variable
const object = generateTestObject(); for(key in object){ const value = object[key] const test = key + '' + value }
Object.entries() for of
const object = generateTestObject(); for(const [key, value] of Object.entries(object)){ const test = key + '' + value })

Rendered benchmark preparation results:

Previous results

Performance of JavaScript .forEach vs for in 2 (version: 1)