Run results for: .dot vs ['bracket'] notation

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 16_3_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.3 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 16

Operating system: iOS 16.3.1

Device Platform: Mobile

Date tested: one year ago

Benchmark engine: Benchmark.js

bracket / small object

204.7M/s

dot / small object

202.7M/s

dot / big object

200.1M/s

bracket / big object

193.8M/s

View exact numbers

Test name	Executions per second
✓ bracket / small object	204,744,448 Ops/sec
dot / small object	202,724,608 Ops/sec
dot / big object	200,061,664 Ops/sec
bracket / big object	193,818,560 Ops/sec

Script Preparation code:

  // setup a tiny object
  var foo = {
   prop25: "value25"
  };
  
  // setup a really big object
  var bigObj = {};
  for (var i = 0; i < 100000; i++) {
   bigObj["prop" + i] = "value" + i;
  }

Tests:

dot / small object
var a = foo.prop25;
bracket / small object
var a = foo['prop25'];
dot / big object
var a = bigObj.prop25;
bracket / big object
var a = bigObj['prop25'];

Run results for: .dot vs ['bracket'] notation

Fork of https://jsperf.com/dot-vs-square-bracket/5

dot / small object

bracket / small object

dot / big object

bracket / big object