Benchmark: obj 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
	}
})();

})()

Tests:

assign
var red = assign('xx');
setproto
var yellow = setproto('yy');

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
assign
setproto

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

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Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):

LLMs can make mistakes. Check important info.

I'd be happy to explain what's being tested in the provided benchmark.

**Benchmark Overview**

The benchmark measures the performance of two JavaScript functions: `window.assign` and `window.setproto`. Both functions are used to assign properties to an object, but they differ in their approach.

**Functionality**

* `assign(x)`: This function assigns a new property to the global `base` object using `Object.assign()`.
	+ Pros:
		- Uses built-in `Object.assign()` method for efficient property assignment.
	+ Cons:
		- May not be compatible with older browsers that don't support `Object.assign()`.
* `setproto(x)`: This function sets the prototype of a new object using `Object.setPrototypeOf()`.
	+ Pros:
		- May provide better compatibility with older browsers, as it's a more traditional way of setting prototypes.
	+ Cons:
		- Uses a slower and less efficient method for property assignment.

**Library Usage**

Neither `assign` nor `setproto` uses any external libraries. They are built-in JavaScript functions.

**Special JS Features or Syntax**

* `Object.assign()` is a modern JavaScript feature introduced in ECMAScript 2015 (ES6). It's not supported in older browsers.
* `Object.setPrototypeOf()` is also a modern feature introduced in ECMAScript 2016 (ES7). While it's still widely supported, some older browsers may not have it enabled by default.

**Other Alternatives**

If you need to support older browsers that don't support `Object.assign()` or `Object.setPrototypeOf()`, you can use alternative approaches:

* For `assign(x)`: Use the `slice()` method to create a new object and then assign properties using the bracket notation (e.g., `base['a'] = 1;`).
* For `setproto(x)`: Use the ` prototype` property of an existing object and set its value using the `Object.create()` method.

Keep in mind that these alternatives may not be as efficient or compatible with modern browsers, but they can help ensure broader compatibility.

Related benchmarks:

obj assign setproto (version: 0)

Comparing performance of: assign vs setproto

Created: 7 years ago by: Guest

Jump to the latest result

assign

setproto

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):