Benchmark: Concat vs push(...) for large arrays (500 up to 50000)

Script Preparation code:

window.top.tests = {control:[], concat:[], spread:[], apply: []};
window.test = (new Array(500)).fill(null).map((e, i) => ( {
    "_id": "6756f95de1bf2a3657bf2262",
    "index": 0,
    "guid": "bdc23f10-a1ac-47ad-a423-1c498f5d7857",
    "isActive": true,
    "balance": "$2,288.04",
    "picture": "http://placehold.it/32x32",
    "age": i,
    "eyeColor": "brown",
    "name": "Reid Holden",
    "gender": "male",
    "company": "KAGGLE",
    "email": "reidholden@kaggle.com",
    "phone": "+1 (844) 427-3173",
    "address": "923 Dewitt Avenue, Macdona, Florida, 2333",
    "about": "Eu quis amet ipsum id occaecat reprehenderit cillum cupidatat ullamco ad duis. Lorem tempor incididunt culpa dolor labore et officia nulla aliqua et incididunt amet dolor reprehenderit. Ut voluptate est elit quis fugiat ex magna irure eiusmod esse duis sint qui. Exercitation duis duis ullamco est eiusmod sunt eiusmod velit laboris ex elit.\r\n",
    "registered": "2017-07-12T07:52:14 -02:00",
    "latitude": 49.456753,
    "longitude": -37.824429,
    "tags": [
      "est",
      "laborum",
      "laborum",
      "incididunt",
      "adipisicing",
      "anim",
      "sit"
    ],
    "friends": [
      {
        "id": 0,
        "name": "Gutierrez Collins"
      },
      {
        "id": 1,
        "name": "Lisa Richardson"
      },
      {
        "id": 2,
        "name": "Wilson Kane"
      }
    ],
    "greeting": "Hello, Reid Holden! You have 4 unread messages.",
    "favoriteFruit": "strawberry"
  }));

window.cutoff = 50000;

Tests:

Control (for push)
for (let element of window.test) window.top.tests.control.push(element); if (window.top.tests.control.length > window.cutoff) { window.top.tests.control = []; console.log('reset control'); }
Concat
window.top.tests.concat = window.top.tests.concat.concat(window.test); if (window.top.tests.concat.length > window.cutoff) { window.top.tests.concat = []; console.log('reset concat'); }
Spread
window.top.tests.spread.push(...window.test); if (window.top.tests.spread.length > window.cutoff) { window.top.tests.spread = []; console.log('reset spread'); }
Apply
window.top.tests.apply.push.apply(window.top.tests.apply, window.test); if (window.top.tests.apply.length > window.cutoff) { window.top.tests.apply = []; console.log('reset apply'); }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Control (for push)
Concat
Spread
Apply

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36

Browser/OS: Chrome 131 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
Control (for push)	6743.3 Ops/sec
Concat	18922.7 Ops/sec
Spread	177116.1 Ops/sec
Apply	166348.6 Ops/sec

Related benchmarks:

Concat vs push(...) for large arrays (500 up to 50000) (version: 1)

Comparing the various ways to append to a large array

Comparing performance of: Control (for push) vs Concat vs Spread vs Apply

Created: one year ago by: Guest

Jump to the latest result

Control (for push)

Concat

Spread

Apply

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A