Benchmark: $.each vs for cycle for array of object

HTML Preparation code:


<script src='https://cdnjs.cloudflare.com/ajax/libs/jquery/3.4.1/jquery.js'></script>

Script Preparation code:

var array = [{id: "1", name: "name1"}, {id: "2", name: "name2"}, {id: "3", name: "name3"}, {id: "4", name: "name4"}, {id: "5", name: "name5"}];

Tests:

$.each
$.each(array, function(index, value) { console.log("index" + index + ",value:" + value.id + "," + value.name); });
for cycle
for (let index = 0; index < array.length; ++index) { console.log("index" + index + ",value:" + array[i].id + "," + array[i].name); }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
$.each
for cycle

Fastest: N/A

Slowest: N/A

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

LLMs can make mistakes. Check important info.

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

**Benchmark Definition**

The benchmark is comparing two approaches to iterate over an array of objects:

1. **$.each**: This method is part of the jQuery library, which provides a convenient way to iterate over arrays and objects. The `$.each` method takes three arguments: the array to iterate over, the index of each element in the array, and the value of each element.
2. **For cycle**: A traditional JavaScript `for` loop that iterates over an array using the `length` property.

**Options Compared**

The benchmark is comparing the performance of these two approaches:

* **$.each**
	+ Pros:
		- Convenient and easy to use
		- Reduces boilerplate code
	+ Cons:
		- May introduce additional overhead due to the jQuery library
		- Less control over iteration logic
* **For cycle**
	+ Pros:
		- More control over iteration logic
		- No additional overhead from a library
	+ Cons:
		- Requires more boilerplate code

**Library: jQuery**

The benchmark uses jQuery, which is a popular JavaScript library for DOM manipulation and event handling. In this case, the `$.each` method is being used to iterate over an array of objects.

**Test Case Interpretation**

In the test case, `$.each(array, function(index, value) { ... });`, we can see that:

* The `array` variable holds an array of objects with `id` and `name` properties.
* The `function(index, value)` callback is executed for each element in the array, where `index` is the current index and `value` is the object itself.

The equivalent `for cycle` test case uses a traditional JavaScript loop: `for (let index = 0; index < array.length; ++index) { ... }`.

**Special JS Feature/Syntax**

There are no special JS features or syntax being used in this benchmark. The code is straightforward and easy to understand.

**Other Alternatives**

If you don't have jQuery, you can use other libraries like Lodash (`_.each`) or implement a custom `forEach` function.

Alternatively, if you prefer not to use libraries, you can use a traditional JavaScript `for` loop or even iterate over the array using the `map()` method. However, these approaches might require more code and less convenience than using jQuery's `$.each`.

For example, you could use Lodash's `_.forEach` function:
```javascript
var _ = require('lodash');
_.forEach(array, function(value) {
  console.log(value.id + ', ' + value.name);
});
```
Or implement a custom `forEach` function:
```javascript
function forEach(arr, callback) {
  for (let i = 0; i < arr.length; i++) {
    callback(arr[i]);
  }
}

forEach(array, function(value) {
  console.log(value.id + ', ' + value.name);
});
```
These alternatives might provide more control over iteration logic, but they also require more code and effort.

Latest run results:

Run details: (Test run date: 4 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Firefox/78.0

Browser/OS: Firefox 78 on Windows

View result in a separate tab

Test name	Executions per second
$.each	4252.3 Ops/sec
for cycle	4397.9 Ops/sec

Related benchmarks:

$.each vs for cycle for array of object (version: 0)

Test which method work quicker for work with array

Comparing performance of: $.each vs for cycle

Created: 4 years ago by: Guest

Jump to the latest result

$.each

for cycle

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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