Benchmark: union vs concat+uniq

HTML Preparation code:

<script type="text/javascript" src="https://cdn.jsdelivr.net/npm/lodash@4.17.10/lodash.min.js"></script>

Script Preparation code:

var AA = [[1, 2, 3, 4, 5],[1, 3, 3, 4, 5],[1, 8, 3, 4, 9],[1, 4, 3, 4, 5],[1, 1, 3, 4, 5],[1, 6, 7, 4, 5],[1, 7, 7, 4, 5],[1, 4, 3, 4, 5],[1, 4, 3, 4, 5],[1, 4, 3, 4, 5],[1, 4, 3, 4, 5],[1, 4, 3, 4, 5],[1, 4, 3, 4, 5],[1, 4, 3, 4, 5],[1, 4, 3, 4, 5]]

Tests:

concat+uniq
var a = AA.reduce((accum, x) => { return accum.concat(x); }) var b = _.uniq(a)
union
var a = AA.reduce((accum, x) => { return _.union(accum, x); }) var b = a;

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
concat+uniq
union

Fastest: N/A

Slowest: N/A

ⓘ Get performance results from real users on your website with Request Metrics.

Website Performance Monitoring by Request Metrics

Latest run results:

Run details: (Test run date: 5 years ago)

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/69.0.3497.81 Chrome/69.0.3497.81 Safari/537.36

Browser/OS: Chromium 69 on Ubuntu

View result in a separate tab

Test name	Executions per second
concat+uniq	173362.3 Ops/sec
union	91227.9 Ops/sec

union vs concat+uniq (version: 0)

Comparing performance of: concat+uniq vs union

Created: 5 years ago by: Guest

Jump to the latest result

concat+uniq

union

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A