Benchmark: Test prototype speed

Script Preparation code:

var Vec2 = function(x, y) {
  this.x = x || 0;
  this.y = y || 0;
  return this;
};

Vec2.prototype.add = function(v, y) {
  if (arguments.length === 1) {
    this.x += v.x;
    this.y += v.y;
  } else {
    this.x += v;
    this.y += y;
  }
  return this;
};

Tests:

No Prototype
var v = new Vec2(); v.x += 1; v.y += 1;
With Prototype
var v = new Vec2(); v.add(1,1)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
No Prototype
With Prototype

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 27 days ago):

LLMs can make mistakes. Check important info.

Let's break down the provided JSON and explain what is being tested.

**Benchmark Definition**

The benchmark definition represents the JavaScript code that will be executed during the test. In this case, there are two benchmarks:

1. **No Prototype**: The code simply creates a new instance of the `Vec2` class, increments its `x` and `y` properties by 1.
2. **With Prototype**: The code also creates a new instance of the `Vec2` class but uses the `add` method to increment its `x` and `y` properties.

**Options Compared**

The options being compared are the performance differences between executing JavaScript code without prototype inheritance (i.e., using `new`) versus with prototype inheritance.

**Pros and Cons**

* **Without Prototype Inheritance:**
	+ Pros:
		- Can lead to more predictable behavior, as each instance is a separate object.
		- May result in better optimization by the JavaScript engine.
	+ Cons:
		- Can be slower due to the overhead of creating a new object and binding methods to it.
* **With Prototype Inheritance:**
	+ Pros:
		- Can lead to more concise code, as instances can inherit behavior from parent classes.
		- May result in faster performance, as the JavaScript engine can optimize the lookup for properties and methods.
	+ Cons:
		- Can lead to unexpected behavior if not used carefully, as prototype inheritance can modify or override existing objects.

**Library and Purpose**

The `Vec2` class is a custom library that represents a 2D vector with `x` and `y` properties. The `add` method is used to increment the `x` and `y` values of an instance.

**Special JS Features/Syntax**

There are no special JavaScript features or syntax mentioned in the benchmark definition.

**Other Alternatives**

If you wanted to test the performance difference between these options, you could consider additional variations, such as:

* Using a different type of inheritance (e.g., `Function.prototype` instead of prototype chain)
* Adding more properties or methods to the `Vec2` class
* Testing with different types of objects (e.g., arrays, objects)
* Using a different JavaScript engine or version

Keep in mind that these variations would require additional benchmark definitions and test cases.

Latest run results:

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

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.84 Safari/537.36

Browser/OS: Chrome 63 on Mac OS X 10.11.6

View result in a separate tab

Test name	Executions per second
No Prototype	9834506.0 Ops/sec
With Prototype	9573921.0 Ops/sec

Related benchmarks:

Test prototype speed (version: 0)

Comparing performance of: No Prototype vs With Prototype

Created: 6 years ago by: Guest

Jump to the latest result

No Prototype

With Prototype

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 27 days ago):