Benchmark: function vs class method vs new function method v2

Script Preparation code:

var arr = [];
var classInstances = [];
var functionInstances = [];
var numInstances = 100000;

function addItem(item) {
  arr.push(item);
};

class TestClass {
  constructor() {
  }
  addItem(item){
    this.item = item;
    arr.push(this.item)
  }
}

function TestFunction() {
}

TestFunction.prototype.addItem = function(item) {
	  this.item = item;
      arr.push(item)
}

for( var i = 0; i < numInstances; i++ ) {
  classInstances[i] = new TestClass();
  functionInstances[i] = new TestFunction();
}

​x
 
var arr = [];var classInstances = [];var functionInstances = [];var numInstances = 100000;​function addItem(item) {  arr.push(item);};​class TestClass {  constructor() {  }  addItem(item){    this.item = item;    arr.push(this.item)  }}​function TestFunction() {}​TestFunction.prototype.addItem = function(item) {      this.item = item;      arr.push(item)}​for( var i = 0; i < numInstances; i++ ) {  classInstances[i] = new TestClass();  functionInstances[i] = new TestFunction();}

Tests:

pure function
arr.length = 0; for (var i = 0; i < numInstances; i++) { addItem(i); }
arr.length = 0;
for (var i = 0; i < numInstances; i++) {
addItem(i);
}
class method
arr.length = 0; for (var i = 0; i < numInstances; i++) { classInstances[i].addItem(i); }
arr.length = 0;
for (var i = 0; i < numInstances; i++) {
classInstances[i].addItem(i);
}
function method
arr.length = 0; for (var i = 0; i < numInstances; i++) { functionInstances[i].addItem(i); }
arr.length = 0;
for (var i = 0; i < numInstances; i++) {
functionInstances[i].addItem(i);
}

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Experimental features:

Memory measurements supported only in Chrome.
For precise memory measurements Chrome must be launched with --enable-precise-memory-info flag.
More information: Monitoring JavaScript Memory

Test case name	Result
pure function
class method
function method

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 3 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/94.0.4606.71 Safari/537.36

Browser/OS: Chrome 94 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
pure function	83.5 Ops/sec
class method	78.3 Ops/sec
function method	81.1 Ops/sec

Autogenerated LLM Summary (model llama3.2:3b, generated 6 months ago):

Let's dive into the world of JavaScript microbenchmarks!

Benchmark Overview

The benchmark measures the performance difference between three approaches:

Pure Function: A simple function that takes an argument and adds it to an array.
Class Method: A method within a class instance that also adds an item to an array.
Function Method (with prototype): A method attached to a constructor function's prototype, which can be called on instances of the function.

Options Compared

The benchmark compares the performance of these three approaches in terms of:

Number of executions per second
Browser and device details

Pros and Cons

Pure Function:
- Pros: Lightweight, easy to understand, and maintain.
- Cons: May not be suitable for complex logic or data processing.
Class Method:
- Pros: Can encapsulate data and behavior, easier to manage state.
- Cons: More verbose than pure functions, may incur overhead due to instance creation.
Function Method (with prototype):
- Pros: Combines the benefits of classes and functions, reducing overhead.
- Cons: May lead to confusing code organization if not used carefully.

Library and Special JS Features

In this benchmark, no external libraries are used. However, note that if you were to extend or modify the test cases, you might need to consider using libraries like Lodash for utility functions or ES6 Promises for handling asynchronous operations.

No special JavaScript features are explicitly mentioned in the benchmark definition or test cases.

Alternative Approaches

If you're looking for alternative approaches to this benchmark, consider:

Closures: Using a closure to wrap the array and method can provide similar performance characteristics to functions with prototype methods.
Higher-Order Functions: Applying higher-order functions like map or forEach to manipulate arrays could be compared to pure functions and class methods.
Generators: Using generators for iterative processing might offer performance advantages over traditional loops.

When evaluating these alternatives, keep in mind the specific use case and requirements of your project.

I hope this explanation helps you understand the benchmark and its underlying mechanics!

LLMs can make mistakes. Check important info.

Let's dive into the world of JavaScript microbenchmarks!

**Benchmark Overview**

The benchmark measures the performance difference between three approaches:

1. **Pure Function**: A simple function that takes an argument and adds it to an array.
2. **Class Method**: A method within a class instance that also adds an item to an array.
3. **Function Method (with prototype)**: A method attached to a constructor function's prototype, which can be called on instances of the function.

**Options Compared**

The benchmark compares the performance of these three approaches in terms of:

* Number of executions per second
* Browser and device details

**Pros and Cons**

1. **Pure Function**:
	* Pros: Lightweight, easy to understand, and maintain.
	* Cons: May not be suitable for complex logic or data processing.
2. **Class Method**:
	* Pros: Can encapsulate data and behavior, easier to manage state.
	* Cons: More verbose than pure functions, may incur overhead due to instance creation.
3. **Function Method (with prototype)**:
	* Pros: Combines the benefits of classes and functions, reducing overhead.
	* Cons: May lead to confusing code organization if not used carefully.

**Library and Special JS Features**

In this benchmark, no external libraries are used. However, note that if you were to extend or modify the test cases, you might need to consider using libraries like `Lodash` for utility functions or `ES6 Promises` for handling asynchronous operations.

No special JavaScript features are explicitly mentioned in the benchmark definition or test cases.

**Alternative Approaches**

If you're looking for alternative approaches to this benchmark, consider:

1. **Closures**: Using a closure to wrap the array and method can provide similar performance characteristics to functions with prototype methods.
2. **Higher-Order Functions**: Applying higher-order functions like `map` or `forEach` to manipulate arrays could be compared to pure functions and class methods.
3. **Generators**: Using generators for iterative processing might offer performance advantages over traditional loops.

When evaluating these alternatives, keep in mind the specific use case and requirements of your project.

I hope this explanation helps you understand the benchmark and its underlying mechanics!

Related benchmarks:

function vs class method vs new function method v2 (version: 0)

Comparing performance of: pure function vs class method vs function method

Created: 3 years ago by: Guest

Jump to the latest result

pure function

class method

function method

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 6 months ago):