Benchmark: testing different solutions with objects in reduce

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 });

Rendered benchmark preparation results:

Previous results

Test case name	Result
spread
new prop in acc
new prop by object assign
just new acc without enumeration
just old acc without enumeration

Latest run results:

Run details: (Test run date: 7 months ago)

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/OS: Chrome 140 on Mac OS X 10.15.7

Test name	Executions per second
spread	45143272.0 Ops/sec
new prop in acc	76229672.0 Ops/sec
new prop by object assign	34335056.0 Ops/sec
just new acc without enumeration	78269824.0 Ops/sec
just old acc without enumeration	84941280.0 Ops/sec

Related benchmarks:

testing different solutions with objects in reduce (version: 3)