Benchmark: $.each vs for ... in for object

HTML Preparation code:

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

Script Preparation code:

var resultObject = {"1": ["1"], "2": ["2"], "3": ["3"], "4": ["4"], "5": ["5"], "6": ["6"], "7": ["7"], "8": ["8"], "9": ["9"], "10": ["10"]};

Tests:

$.each
$.each(resultObject, function (id, array) { console.log("id: " + id + ", array:" + array); });
for ... in
for (const id in resultObject) { if (resultObject.hasOwnProperty(id)) { console.log("id: " + id + ", array:" + resultObject[id]); } }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
$.each
for ... in

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):

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Let's dive into the world of JavaScript microbenchmarks.

**What is being tested?**

The provided JSON represents two test cases that compare the performance of iterating through an object using two different approaches:

1. `$`.each()`: This method is part of the jQuery library, which is a popular JavaScript library for DOM manipulation and event handling.
2. `for ... in`: This is a native JavaScript syntax that allows you to iterate over the properties of an object.

**Options being compared**

The main options being compared are:

* `$`.each() vs `for ... in`
* These two approaches have different performance characteristics, which we'll discuss below.

**Pros and Cons of each approach**

### $.each()

Pros:

* Easier to read and maintain, as it's a method call with a clear intent.
* Can be more efficient for large datasets, as it's optimized by jQuery.

Cons:

* May incur additional overhead due to the library's internal workings.
* Not part of native JavaScript, which can lead to compatibility issues.

### for ... in

Pros:

* Native JavaScript syntax, ensuring better compatibility across browsers and platforms.
* Can be more efficient for small datasets or simple iteration patterns.

Cons:

* Less intuitive for complex iteration scenarios, as it relies on the `in` keyword.
* May require additional code to handle edge cases (e.g., array properties).

**Library usage**

The test case uses the jQuery library, which provides a convenient wrapper around the `$`.each()` method. This allows developers to leverage jQuery's optimization and caching mechanisms for better performance.

**Special JavaScript feature or syntax**

There is no specific special feature or syntax being tested in this benchmark. Both `$.each()` and `for ... in` are standard JavaScript constructs.

**Other alternatives**

For iterating through objects, other alternatives include:

* `forEach()`: A newer method introduced in ECMAScript 2015 (ES6), which provides a more concise alternative to `$.each()`.
* `map()`, `filter()`, and `reduce()`: These methods can be used in combination with `for ... in` or `$`.each()` to iterate over objects.
* Loops using traditional indexing (e.g., `for (var i = 0; i < object.length; i++) { ... }`).

Related benchmarks:

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Comparing performance of: $.each vs for ... in

Created: 5 years ago by: Guest

Jump to the latest result

$.each

for ... in

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):