Benchmark: _.join() vs Array.join()

HTML Preparation code:


<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>

Script Preparation code:

var arr = ["I"," ","am"," ","a"," ","string"];

Tests:

LoDash: _.join()
console.log(_.join(arr, ""));
Array: Array.join()
console.log(arr.join(""));

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
LoDash: _.join()
Array: Array.join()

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.36

Browser/OS: Chrome 133 on Windows

View result in a separate tab

Test name	Executions per second
LoDash: _.join()	414447.5 Ops/sec
Array: Array.join()	413639.9 Ops/sec

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

LLMs can make mistakes. Check important info.

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

**Benchmark Definition**

The benchmark measures the performance difference between two approaches:

1. **Lodash: `_join()`**: Lodash is a popular JavaScript utility library that provides a wide range of functions for tasks like string manipulation, array operations, and more.
2. **Array: `Array.join()`**: This is a built-in JavaScript method that concatenates an array's elements into a single string.

**Script Preparation Code**

The script preparation code creates an array `arr` containing seven empty strings:
```javascript
var arr = ["I", "", "am", "", "a", "", "string"];
```
This array will be used as input for both the Lodash and Array.join() methods.

**Html Preparation Code**

The html preparation code includes a script tag that loads the Lodash library from a CDN. This is necessary to use Lodash's `_join()` function:
```html
<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>
```
**Test Cases**

There are two test cases:

1. **LoDash: _.join()**
```javascript
console.log(_.join(arr, ""));
```
This code uses Lodash's `_join()` function to concatenate the elements of `arr` with an empty string as the separator.
2. **Array: Array.join()**
```javascript
console.log(arr.join(""));
```
This code uses the built-in `Array.join()` method to concatenate the elements of `arr` with an empty string as the separator.

**Performance Comparison**

The benchmark measures the performance difference between these two approaches. The results show that:

* **Array: Array.join()**: 413919 executions per second (with a raw UA string indicating Chrome 102 on a desktop platform)
* **LoDash: _.join()**: 403123 executions per second

Based on these results, it appears that the `Array.join()` method is slightly faster than Lodash's `_join()` function.

**Pros and Cons**

Here are some pros and cons of each approach:

1. **Lodash: `_join()`**
	* Pros:
		+ Convenient and readable syntax
		+ Can handle more complex string concatenation scenarios (e.g., with arguments)
	* Cons:
		+ Requires an additional library load (Lodash)
		+ May introduce overhead due to the library's complexity
2. **Array: Array.join()**
	* Pros:
		+ Built-in and optimized for performance
		+ No additional library load required
	* Cons:
		+ Less readable syntax compared to Lodash's `_join()` function
		+ Limited flexibility in handling complex string concatenation scenarios

**Alternative Approaches**

If you don't want to use a library like Lodash, you can also consider using other alternatives for string concatenation:

1. **Using template literals**: You can use template literals (introduced in ECMAScript 2015) to concatenate strings:
```javascript
console.log(`${arr.join("")}`);
```
2. **Using a simple loop**: You can write a simple loop to concatenate the array elements:
```javascript
let result = "";
for (const element of arr) {
  result += element;
}
console.log(result);
```
However, these alternatives may have varying performance characteristics depending on your use case.

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

Related benchmarks:

_.join() vs Array.join() (version: 0)

_.join() vs Array.join()

Comparing performance of: LoDash: _.join() vs Array: Array.join()

Created: 5 years ago by: Registered User

Jump to the latest result

LoDash: _.join()

Array: Array.join()

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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