Run results for: testing different solutions with objects in reduce

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/140.0.0.0 Safari/537.36

Browser: Chrome 140

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 10 months ago

new prop in acc

73.4M/s

spread

44.1M/s

View exact numbers

Test name	Executions per second
✓ new prop in acc	73,366,776 Ops/sec
spread	44,099,548 Ops/sec

HTML Preparation code:

<!--your preparation HTML code goes here-->

Script Preparation code:

let data = [];

for (let i = 0; i < 1000; i++) {
	data.push(i);
}

let obj = data.reduce((acc, item) => ({ ...acc, id: item }), {});

Tests:

spread
let newObj = Object.keys(obj).reduce((acc, key) => ({ ...acc, [key]: obj[key] + 1 }), {})
new prop in acc
let newObj = Object.keys(obj).reduce((acc, key) => { acc[key] = obj[key] + 1; return acc; }, {});
new prop by object assign
let newObj = Object.keys(obj).reduce((acc, key) => Object.assign(acc, { [key]: obj[key] + 1 }), {})
just new acc without enumeration
let newObj = Object.keys(obj).reduce((acc, key) => ({ result: acc.result + obj[key]}),{ result: 0 })
just old acc without enumeration
let newObj = Object.keys(obj).reduce((acc, key) => { acc.result += obj[key]; return acc; }, { result: 0 });