Run results for: Merge array without duplicates (Array, Set layout)

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36 OPR/106.0.0.0

Browser: Opera 106

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 10 months ago

Test name	Executions per second
Array + Array (concat) => 1 Set => Array	24802.1 Ops/sec
Set + Set (spread) => Set + Array => Array	15766.6 Ops/sec

Script Preparation code:

var lists = [
  [
    'aaa', 'bbb', 'c', 'ccc', 'ddd', 'eee', 'fff', 'ggg', 'gcd',
    'bbb---ccc---gcc', 'bbb---ccc---g++', 'bbb---ccc---gcc',
    'aaa', 'bbb', 'c', 'ccc', 'ddd', 'eee', 'fff', 'ggg', 'gcd',
    'bbb---ccc---gcc', 'bbb---ccc---g++', 'bbb---ccc---gcc',
    'aaa', 'bbb', 'c', 'ccc', 'ddd', 'eee', 'fff', 'ggg', 'gcd',
    'ddd', 'eee', 'ggg', 'bbb', 'ccc', 'gga', 'ggb', 'gcc',
    'bbb---ccc---gcc', 'bbb---ccc---gcc', 'bbb---ccc---gcc',
    'bbb---ccc---gcc', 'bbb---ccc---g++', 'bbb---ccc---gcc',
    'aaa', 'bbb', 'c', 'ccc', 'ddd', 'eee', 'fff', 'ggg', 'gcd',
    'bbb---ccc---gcc', 'bbb---ccc---g++', 'bbb---ccc---gcc',
    'aaa', 'bbb', 'c', 'ccc', 'ddd', 'eee', 'fff', 'ggg', 'gcd',
    'bbb---ccc---gcc', 'bbb---ccc---g++', 'bbb---ccc---gcc',
  ],
  [
    'ddd', 'eee', 'ggg', 'bbb', 'ccc', 'gga', 'ggb', 'gcc',
    'bbb---ccc---gcc', 'bbb---ccc---gcc', 'bbb---ccc---gcc',
    'ddd', 'eee', 'ggg', 'bbb', 'ccc', 'gga', 'ggb', 'gcc',
    'bbb---ccc---gcc', 'bbb---ccc---gcc', 'bbb---ccc---gcc',
    'ddd', 'eee', 'ggg', 'bbb', 'ccc', 'gga', 'ggb', 'gcc',
    'bbb---ccc---gcc', 'bbb---ccc---gcc', 'bbb---ccc---gcc',
  ],
];

Tests:

Array + Array (concat) => 1 Set => Array
Array.from( new Set(lists[0].concat(lists[1])) )
Set + Set (spread) => Set + Array => Array
Array.from( new Set([ ...new Set(lists[0]), ...new Set(lists[1]), ]) )

Run results for: Merge array without duplicates (Array, Set layout)

Array + Array (concat) => 1 Set => Array

Set + Set (spread) => Set + Array => Array