Benchmark: object assign setproto create

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.factory = function(x){
        const o = _base()
        o[Math.random()+'x'] = Math.random()+'x'+x
		return o
	}
})();

})()

Tests:

assign
var red = assign('xx');
setproto
var yellow = setproto('yy');
proto
var z = proto('z');
create
var a = create('a');
factory
var b = factory('b')

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
assign
setproto
proto
create
factory

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 and explain what's being tested, compared options, pros and cons, and other considerations.

**Benchmark Definition**

The benchmark is composed of four test cases: `assign`, `setproto`, `proto`, and `create`. The `factory` test case is not included in the latest benchmark result. Each test case has a unique JavaScript code snippet that defines a function on the global object (`window`). These functions are used to modify objects, specifically setting properties or creating new objects.

**Tested Options**

The options being compared are:

1. **`assign()`**: This function assigns an object to another object using `Object.assign()`. The assigned object has a property with a dynamic key generated by `Math.random()+'x'`.
2. **`setproto()`**: This function sets the prototype of an object using `Object.setPrototypeOf()`. The specified object is used as the prototype for a new object, and a property is added to the new object with a dynamic key.
3. **`proto()`**: This function creates an object by setting its prototype using `__proto__`. The object created has a property with a dynamic key.
4. **`create()`**: This function creates a new object using `Object.create()`, which takes another object (in this case, the global object) as the prototype.

**Pros and Cons**

Here's a brief overview of the pros and cons of each option:

1. **`assign()`**:
	* Pros: Simple to implement, works across browsers.
	* Cons: May not be supported in older browsers or environments that don't have `Object.assign()`.
2. **`setproto()`**:
	* Pros: Can be used to create objects with a specific prototype hierarchy.
	* Cons: Can be slower due to the overhead of `Object.setPrototypeOf()`.
3. **`proto()`**:
	* Pros: Simple to implement, works across browsers.
	* Cons: May not work correctly in older browsers or environments that don't support `__proto__`.
4. **`create()`**:
	* Pros: Works with any object as a prototype.
	* Cons: Can be slower due to the overhead of `Object.create()`, and may not work correctly in older browsers.

**Other Considerations**

* The use of dynamic property keys (`Math.random()+'x'`) ensures that each test case creates unique objects, making it easier to compare results.
* The benchmark uses Chrome 69 as the browser, but it's likely that the code will need to be tested with other browsers and environments.

**Alternatives**

Other alternatives for creating or modifying objects include:

* `Object.defineProperty()`: used to define properties on an object, which can be slower than `assign()` or `setproto()`.
* `Object.assign()` in older browsers (e.g., IE 11): may not work correctly due to differences in behavior.

In summary, the benchmark tests four different methods for creating or modifying objects: `assign()`, `setproto()`, `proto()`, and `create()`. Each method has its pros and cons, and understanding these trade-offs can help developers choose the best approach for their specific use cases.

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
assign	101817.7 Ops/sec
setproto	291947.9 Ops/sec
proto	281671.2 Ops/sec
create	327596.6 Ops/sec
factory	134151.9 Ops/sec

Related benchmarks:

object assign setproto create (version: 0)

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

Created: 6 years ago by: Guest

Jump to the latest result

assign

setproto

proto

create

factory

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):