Benchmark: unique objects in array by value using filter

HTML Preparation code:

<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.11/lodash.js"></script>

Script Preparation code:

var analysisAuthors = [{"studyField":"novel","authorName":"Apollinaire"},{"studyField":"novel","authorName":"Apollinaire"},{"studyField":"novel","authorName":"Apollinaire"},{"studyField":"novel","authorName":"Apollinaire"},{"studyField":"novel","authorName":"Apollinaire"},{"studyField":"novel","authorName":"Apollinaire"},{"studyField":"novel","authorName":"De Lafayette"},{"studyField":"novel","authorName":"Beckett"},{"studyField":"novel","authorName":"Montesquieu"},{"studyField":"novel","authorName":"Yourcenar"}]

Tests:

_.uniqBy
_.uniqBy(analysisAuthors, "authorName")
Set
Array.from(new Set(analysisAuthors.map(a => a.authorName))) .map(authorName => { return analysisAuthors.find(a => a.authorName === authorName) })
findIndex
analysisAuthors.filter((author, index, authorsList) => authorsList .findIndex(authorInList => authorInList.authorName === author.authorName) === index)
reduce
analysisAuthors.reduce((acc, current) => { const x = acc.find(item => item.authorName === current.authorName); if (!x) { return acc.concat([current]); } else { return acc; } }, [])

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
_.uniqBy
Set
findIndex
reduce

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: 4 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/78.0.3904.108 Safari/537.36

Browser/OS: Chrome 78 on Mac OS X 10.14.5

View result in a separate tab

Test name	Executions per second
_.uniqBy	1259674.0 Ops/sec
Set	538120.0 Ops/sec
findIndex	3976491.0 Ops/sec
reduce	729870.8 Ops/sec

unique objects in array by value using filter (version: 2)

Comparing performance of: _.uniqBy vs Set vs findIndex vs reduce

Created: 4 years ago by: Registered User

Jump to the latest result

_.uniqBy

Set

findIndex

reduce

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A