Run results for: merge array with lodash vs manual search 2

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.97 Safari/537.36

Browser: Chrome 83

Operating system: Linux

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
merge lodash	884805.9 Ops/sec
merge find	5210594.0 Ops/sec
merge some	5210069.0 Ops/sec

HTML Preparation code:

<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>

Tests:

merge lodash
const arr1 = [{"member" : "57989cbe54cf5d2ce83ff9d8","bank" : "575b052ca6f66a5732749ecc","country" : "575b0523a6f66a5732749ecb"},{"member" : "57989cbe54cf5d2ce83ff9d6","bank" : "575b052ca6f66a5732749ecc","country" : "575b0523a6f66a5732749ecb"}]; const arr2 = [{"member" : "57989cbe54cf5d2ce83ff9d6","name" : 'xxxxxx',"age" : 25},{"member" : "57989cbe54cf5d2ce83ff9d8","name" : 'yyyyyyyyyy',"age" : 26}]; const merged = _(arr1) // start sequence .keyBy('member') // create a dictionary of the 1st array .merge(_.keyBy(arr2, 'member')) // create a dictionary of the 2nd array, and merge it to the 1st .values();
merge find
const arr1 = [{"member" : "57989cbe54cf5d2ce83ff9d8","bank" : "575b052ca6f66a5732749ecc","country" : "575b0523a6f66a5732749ecb"},{"member" : "57989cbe54cf5d2ce83ff9d6","bank" : "575b052ca6f66a5732749ecc","country" : "575b0523a6f66a5732749ecb"}]; const arr2 = [{"member" : "57989cbe54cf5d2ce83ff9d6","name" : 'xxxxxx',"age" : 25},{"member" : "57989cbe54cf5d2ce83ff9d8","name" : 'yyyyyyyyyy',"age" : 26}]; const merged = arr1.filter( element1 => ! arr2.find( element2 => element1["member"] === element2["member"]) ).concat(arr2);
merge some
const arr1 = [{"member" : "57989cbe54cf5d2ce83ff9d8","bank" : "575b052ca6f66a5732749ecc","country" : "575b0523a6f66a5732749ecb"},{"member" : "57989cbe54cf5d2ce83ff9d6","bank" : "575b052ca6f66a5732749ecc","country" : "575b0523a6f66a5732749ecb"}]; const arr2 = [{"member" : "57989cbe54cf5d2ce83ff9d6","name" : 'xxxxxx',"age" : 25},{"member" : "57989cbe54cf5d2ce83ff9d8","name" : 'yyyyyyyyyy',"age" : 26}]; const merged = arr1.filter( element1 => ! arr2.find( element2 => element1["member"] === element2["member"]) ).concat(arr2);

Run results for: merge array with lodash vs manual search 2

merge lodash

merge find

merge some