Benchmark: ES6 equivalent to lodash _.mapValues

Tests:

native approach with reduce
var fruits= { 'apple': { 'name': 'apple', 'number': 5}, 'orange': { 'name': 'orange', 'number': 10 } }; console.log(Object.entries(fruits) .reduce((a, [key, { number }]) => { a[key] = number; return a; }, {} ));
native approach fromEntries
var fruits= { 'apple': { 'name': 'apple', 'number': 5}, 'orange': { 'name': 'orange', 'number': 10 } }; console.log(Object.fromEntries( Object.entries(fruits).map(([key, { number }]) => [key, number]) ));
lodash mapValues
var fruits= { 'apple': { 'name': 'apple', 'number': 5}, 'orange': { 'name': 'orange', 'number': 10 } }; _.mapValues(fruits, 'number');

Historical Performance Data aggregated from 27 community runs

Desktop Results:

Chrome 21 runs

lodash mapValues

4.5M/s

native approach with reduce

325K/s

native approach fromEntries

286K/s

Fastest: lodash mapValues (15.7x faster)

View exact numbers

✓ lodash mapValues: 4,479,920 ops/sec
• native approach with reduce: 324,525 ops/sec
• native approach fromEntries: 286,133 ops/sec

Firefox 6 runs

lodash mapValues

3.1M/s

native approach with reduce

115K/s

native approach fromEntries

109K/s

Fastest: lodash mapValues (28.7x faster)

View exact numbers

✓ lodash mapValues: 3,116,650 ops/sec
• native approach with reduce: 114,670 ops/sec
• native approach fromEntries: 108,751 ops/sec

Results show median performance across all community submissions. Run this benchmark yourself to verify on your device.

Test case name	Result
native approach with reduce
native approach fromEntries
lodash mapValues

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/137.0.0.0 Safari/537.36

Browser/OS: Chrome 137 on Mac OS X 10.15.7

View result in a separate tab

lodash mapValues

14.7M/s

native approach with reduce

562K/s

native approach fromEntries

529K/s

View exact numbers

Test name	Executions per second
✓ lodash mapValues	14,709,377 Ops/sec
native approach with reduce	561,685 Ops/sec
native approach fromEntries	528,806 Ops/sec

ES6 equivalent to lodash _.mapValues (version: 0)

Comparing performance of: `native approach with reduce vs native approach fromEntries vs lodash mapValues`

Created: 6 years ago by: Guest

Go to the latest result

native approach with reduce

native approach fromEntries

lodash mapValues

Historical Performance Data aggregated from 27 community runs

Desktop Results:

Chrome 21 runs

Firefox 6 runs

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

ES6 equivalent to lodash _.mapValues (version: 0)

Comparing performance of: native approach with reduce vs native approach fromEntries vs lodash mapValues

Created: 6 years ago by: Guest

Go to the latest result

native approach with reduce

native approach fromEntries

lodash mapValues

Historical Performance Data aggregated from 27 community runs

Desktop Results:

Chrome 21 runs

Firefox 6 runs

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Related benchmarks

Comparing performance of: `native approach with reduce vs native approach fromEntries vs lodash mapValues`