Toggle navigation
MeasureThat.net
Create a benchmark
Tools
Feedback
FAQ
Register
Log In
Run results for:
Reduce vs Map + FromEntries vs for loop vs map
Original benchmark was unfairly forcing the for loop to be slower through variable declaration and destructuring.
Go to the benchmark
Embed
Embed Benchmark Result
Run details:
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/137.0.0.0 Safari/537.36
Browser:
Chrome 137
Operating system:
Windows
Device Platform:
Desktop
Date tested:
10 months ago
Test name
Executions per second
reduce
7379.9 Ops/sec
map + fromEntries
1694.1 Ops/sec
for loop
12304.9 Ops/sec
map
10986.2 Ops/sec
Script Preparation code:
const data = Array.from(Array(10000).keys()); const dataObject = Object.entries(data)
Tests:
reduce
dataObject.reduce((acc, [k, v]) => { acc[k] = v.toString(); return acc; }, {});
map + fromEntries
Object.fromEntries(dataObject.map(([k, v]) => ([k, v.toString()])));
for loop
const hashLookup = {} for (let i = 0; i < dataObject.length; i++) { hashLookup[i] = dataObject[i]; }
map
const hashLookup = {}; (dataObject ?? []).map((value, index) => hashLookup[index] = value);