Run results for: eliminate duplicates from an array of strings

Run details:

User agent: Mozilla/5.0 (Linux; Android 10; POCO F1 Build/QKQ1.190828.002; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/101.0.4951.61 Mobile Safari/537.36 [LinkedInApp]/0.773.142

Browser: Chrome Mobile 101

Operating system: Android

Device Platform: Mobile

Date tested: 2 years ago

Test name	Executions per second
Set	29163.5 Ops/sec
Lookup	26945.1 Ops/sec
filter	31573.0 Ops/sec
lookup let	25733.4 Ops/sec
regex	22809.6 Ops/sec

Tests:

Set
const str = 'Hello world nice to meet you hello again world'; console.log('unique words:', [...new Set(str.toLowerCase().split(/\s+/))]);
Lookup
const str = 'Hello world nice to meet you hello again world'; const words = {}; for ( const word of str.toLowerCase().split(/\s+/)) { words[word] = word; } console.log('unique words:', Object.keys(words));
filter
const str = 'Hello world nice to meet you hello again world'; console.log('unique words:',str.toLowerCase().split(/\s+/).filter((v, i, m) => i === m.indexOf(v)));
lookup let
const str = 'Hello world nice to meet you hello again world'; const words = {}; for ( let word of str.toLowerCase().split(/\s+/)) { words[word] = word; } console.log('unique words:', Object.keys(words));
regex
const str = 'Hello world nice to meet you hello again world'; console.log('unique words:',str.replace(/(\b\S.+\b)(?=.*\1)/g, "").trim());

Run results for: eliminate duplicates from an array of strings

eliminate duplicates from an array of strings

Set

Lookup

filter

lookup let

regex