Run results for: Testtttt

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/78.0.3904.108 Safari/537.36

Browser: Chrome 78

Operating system: Linux

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
objMergeArr	102304.3 Ops/sec
objSet	77245.0 Ops/sec
spread	21756.3 Ops/sec

Script Preparation code:

function getKey(numb) {
  return numb % 2 ? 'odd' : 'even'
}
function objSet(obj, key, value) {
    obj[key] = value
    return obj
}
function objMergeArr(obj, key, ...values) {
    obj[key].push(...values)
    return obj
}
function arrayPush(arr, ...values) {
    arr.push(...values)
    return arr
}

Tests:

objMergeArr
function getKey(numb) { return numb % 2 ? 'odd' : 'even' } function objSet(obj, key, value) { obj[key] = value return obj } function objMergeArr(obj, key, ...values) { obj[key].push(...values) return obj } function arrayPush(arr, ...values) { arr.push(...values) return arr } const test = Array(100).fill().map((_, index) => index).reduce((acc, val) => { const key = getKey(val) return objMergeArr(acc, key, val) }, { odd: [], even: [] })
objSet
function getKey(numb) { return numb % 2 ? 'odd' : 'even' } function objSet(obj, key, value) { obj[key] = value return obj } function objMergeArr(obj, key, ...values) { obj[key].push(...values) return obj } function arrayPush(arr, ...values) { arr.push(...values) return arr } const test = Array(100).fill().map((_, index) => index).reduce((acc, val) => { const key = getKey(val) return objSet(acc, key, arrayPush(acc[key], val)) }, { odd: [], even: [] })
spread
function getKey(numb) { return numb % 2 ? 'odd' : 'even' } function objSet(obj, key, value) { obj[key] = value return obj } function objMergeArr(obj, key, ...values) { obj[key].push(...values) return obj } function arrayPush(arr, ...values) { arr.push(...values) return arr } const test = Array(100).fill().map((_, index) => index).reduce((acc, val) => { const key = getKey(val) return { ...acc, [key]: [...acc[key], val] } }, { odd: [], even: [] })

objMergeArr

objSet

spread