Benchmark: merge data arr vs obj

HTML Preparation code:

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

Script Preparation code:

var arr1 = [];
var arr2 = [];
var obj1 = {};
var obj2 = {};

for (i = 0; i < 10000; i++) {
  var obj = {
     id: Math.random().toString(36).substr(2, 5),
     name: Math.random().toString(36).substr(2, 5)
  };
  obj1[obj.id] = obj;
  arr1.push(obj);
}

for (i = 10000; i < 20000; i++) {
  var obj = {
     id: Math.random().toString(36).substr(2, 5),
     name: Math.random().toString(36).substr(2, 5),
  };
  obj2[obj.id] = obj;
  arr2.push(obj);
}

Tests:

Lodash unionBy two arrays
var result = _.unionBy(arr1, arr2, 'id');
merge two objects
var result = { ...obj1, ...obj2 }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Lodash unionBy two arrays
merge two objects

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/102.0.0.0 Safari/537.36

Browser/OS: Chrome 102 on Linux

View result in a separate tab

Test name	Executions per second
Lodash unionBy two arrays	307.6 Ops/sec
merge two objects	122.6 Ops/sec

merge data arr vs obj (version: 0)

Comparing performance of: Lodash unionBy two arrays vs merge two objects

Created: one year ago by: Registered User

Jump to the latest result

Lodash unionBy two arrays

merge two objects

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A