Run results for: && vs optional chaining vs nothing

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:137.0) Gecko/20100101 Firefox/137.0

Browser: Firefox 137

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Benchmark engine: Benchmark.js

Nothing

2050.1M/s

865.3M/s

optional chaining (?.)

711.4M/s

View exact numbers

Test name	Executions per second
✓ Nothing	2,050,119,936 Ops/sec
&&	865,286,976 Ops/sec
optional chaining (?.)	711,393,472 Ops/sec

Script Preparation code:

var job = {
  "summary": {
    "total_actions": 4,
    "finished_actions": 4
  },
  "updated_at": "2020-07-15T10:24:42.364000000Z",
  "job_id": "4b1733e7-c8e0-4fdd-a7f1-13d3ab725c92",
  "description": "Job from our export",
  "created_at": "2020-07-15T10:24:40.975000000Z",
  "status": "finished",
  "tags": {
    "export_id": [
      "8848c5d8-fd44-43c0-b7f2-1428d0f4891a" 
    ]
  }
}

Tests:

&&
if (job.tags && job.tags.export_id) { // do nothing }
optional chaining (?.)
if (job.tags?.export_id) { // do nothing }
Nothing
if (job.tags.export_id) { // do nothing }

Run results for: && vs optional chaining vs nothing

How to better null-check

&&

optional chaining (?.)

Nothing