Benchmark: Class instance method lookup vs function-created object method lookup (fork)

Script Preparation code:

window.AClass = class {
  constructor() {
    this.c = () => 5;
  }
  
  b() {
    return 4;
  }
}

window.AFunc = function() {
  function c() {
    return 5;
  }
  
  return {
    b() {
      return 4;
    },
    c,
  };
};

Tests:

Class instance method lookup
const a = new AClass(); a.b(); a.c();
Function-created object method lookup
const a = new AFunc(); a.b(); a.c();

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Class instance method lookup
Function-created object method lookup

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.131 Safari/537.36

Browser/OS: Chrome 92 on Linux

View result in a separate tab

Test name	Executions per second
Class instance method lookup	3718291.0 Ops/sec
Function-created object method lookup	3443502.0 Ops/sec

Class instance method lookup vs function-created object method lookup (fork) (version: 0)

Comparing performance of: Class instance method lookup vs Function-created object method lookup

Created: 3 years ago by: Guest

Jump to the latest result

Class instance method lookup

Function-created object method lookup

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A