Benchmark: obj inheritance create assign setproto

Script Preparation code:

(function(){
  function _base() {
    return {
      a:111,b:1,c:'2134124141',
      d:'werrqwer',e:'34234',fffffffff:'324234',
      gggggg:'99999',jadf:'adsfa',asdfasdf:'asdf',asdfasdf:'sadf',
      [Math.random()]:Math.random(),
      [Math.random()]:Math.random()
    }
  }

  
(function(){
	const base = _base()
	window.assign = function(x){
		return Object.assign({[Math.random()+'x']:Math.random()+'x'+x},base)
  	}
})();

(function(){
	const base = _base()
	window.setproto = function(x){
        const z = Object.setPrototypeOf({
          [Math.random()+'x']: Math.random()+'x'+x
        },base)
		return z
	}
})();
  
  (function(){
	const base = _base()
	window.proto = function(x){
        const z = {
          [Math.random()+'x']: Math.random()+'x'+x
        }
        z.__proto__ = base
		return z
	}
})();
  
 
  (function(){
	const base = _base()
	window.create = function(x){
        const p = Object.create(base)
        p[Math.random()+'x'] = Math.random()+'x'+x
		return p
	}
})();
  
(function(){
	const base = _base()
	window.assign_create = function(x){
        return Object.assign(Object.create(base),
			{ [Math.random()+'x']: Math.random()+'x'+x}
        )
	}
})();
      
  
 (function(){
	const base = _base()
	window.factory = function(x){
        const o = _base()
        o[Math.random()+'x'] = Math.random()+'x'+x
		return o
	}
})();

})()

Tests:

setproto
setproto('a')
assign_create
assign_create('b')
create
create('d')
proto
proto('e')
factory
factory('3')
assign
assign('4')

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
setproto
assign_create
create
proto
factory
assign

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 28 days ago):

LLMs can make mistakes. Check important info.

I'll break down the provided benchmark definition JSON and explain what is tested, compared options, pros and cons of those approaches, library usage, and special JavaScript features.

**Benchmark Definition**

The benchmark definition is a JSON object that contains multiple test cases. Each test case has a unique name and a `Benchmark Definition` string that specifies the code to be executed during the benchmark.

In this case, there are six test cases:

1. `setproto('a')`
2. `assign_create('b')`
3. `create('d')`
4. `proto('e')`
5. `factory('3')`
6. `assign('4')`

**Tested Code**

The benchmark code is generated at runtime and is not explicitly provided in the JSON object. However, we can infer what's being tested based on the test case names.

The test cases seem to be testing different approaches for creating objects or prototypes in JavaScript:

* `setproto`: Testing `Object.setPrototypeOf()` method.
* `assign_create`: Testing a custom implementation of `Object.assign()` with an additional create feature.
* `create`: Testing `Object.create()` method.
* `proto`: Testing assigning a prototype to an object.
* `factory`: Testing a custom factory function for creating objects.
* `assign`: Testing the standard `Object.assign()` method.

**Options Compared**

The benchmark seems to be comparing different approaches for creating objects or prototypes in JavaScript. The options being compared are:

1. Using `Object.setPrototypeOf()`.
2. A custom implementation of `Object.assign()` with an additional create feature (`assign_create`).
3. Using `Object.create()`.
4. Assigning a prototype to an object (`proto`).
5. Using a custom factory function for creating objects (`factory`).
6. The standard `Object.assign()` method.

**Pros and Cons**

Each approach has its own pros and cons:

1. **Object.setPrototypeOf()**: This method is widely supported by modern browsers and is the recommended way to set the prototype of an object in JavaScript.
	* Pros: Fast, reliable, and widely supported.
	* Cons: May not work in older browsers or environments that don't support `Object.setPrototypeOf()`.
2. **Custom implementation of Object.assign() with create feature**: This approach provides additional functionality but may be slower and less reliable than the standard `Object.assign()` method.
	* Pros: Provides an additional create feature, which can be useful in certain scenarios.
	* Cons: May be slower and less reliable than the standard `Object.assign()` method.
3. **Object.create()**: This method is widely supported by modern browsers but may not work as expected in some environments.
	* Pros: Fast and reliable.
	* Cons: May not work correctly in older browsers or environments that don't support `Object.create()`.
4. **Assigning a prototype to an object**: This approach can be slower than using `Object.setPrototypeOf()` because it involves additional overhead.
	* Pros: Easy to implement and understand.
	* Cons: Can be slower than using `Object.setPrototypeOf()`.
5. **Custom factory function for creating objects**: This approach provides a lot of flexibility but may require more code and testing.
	* Pros: Provides a lot of flexibility and customization options.
	* Cons: May be slower, less reliable, and more complex to implement and test.

**Library Usage**

The benchmark seems to be using the following libraries or APIs:

1. `Object.setPrototypeOf()`: This method is part of the ECMAScript standard and is supported by most modern browsers.
2. `Object.assign()`: This method is also part of the ECMAScript standard and is widely supported by modern browsers.

**Special JavaScript Features**

The benchmark seems to be using several special JavaScript features, including:

1. **Prototype chain**: The `setproto()` test case uses the prototype chain feature to set the prototype of an object.
2. **Object creation**: The `create()`, `assign_create`, and `factory` test cases involve creating objects or prototypes in different ways.
3. **Function invocation**: Some test cases, such as `factory()`, use function invocation to create objects.

Overall, the benchmark seems to be testing various approaches for creating objects or prototypes in JavaScript and comparing their performance, reliability, and complexity.

Latest run results:

Run details: (Test run date: 6 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Safari/537.36

Browser/OS: Chrome 69 on Mac OS X 10.14.0

View result in a separate tab

Test name	Executions per second
setproto	268518.8 Ops/sec
assign_create	234894.5 Ops/sec
create	313207.6 Ops/sec
proto	276900.6 Ops/sec
factory	136220.4 Ops/sec
assign	107026.3 Ops/sec

Related benchmarks:

obj inheritance create assign setproto (version: 2)

Comparing performance of: setproto vs assign_create vs create vs proto vs factory vs assign

Created: 6 years ago by: Registered User

Jump to the latest result

setproto

assign_create

create

proto

factory

assign

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 28 days ago):