Benchmark: lodash pullAt vs native splice

HTML Preparation code:

<script src="https://cdn.jsdelivr.net/npm/lodash@4.17.21/lodash.min.js"></script>

Script Preparation code:

var max = 10000000; // 10,000,000 (10 Million)

var arr = [];
for (var i = 0; i <= max; i++) { arr.push(i); }

Tests:

lodash
_.pullAt(arr, 890047);
native
arr.splice(890047, 1);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
lodash
native

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:134.0) Gecko/20100101 Firefox/134.0

Browser/OS: Firefox 134 on Mac OS X 10.15

View result in a separate tab

Test name	Executions per second
lodash	37.2 Ops/sec
native	32.1 Ops/sec

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

LLMs can make mistakes. Check important info.

I'll break down the benchmark and explain what's being tested, compared, and the pros and cons of each approach.

**Benchmark Overview**

The benchmark is designed to compare the performance of two approaches:

1. `lodash` (specifically, the `pullAt` method)
2. Native JavaScript (`splice` method)

**Script Preparation Code**

The script preparation code creates an array `arr` with 10 million elements, from 0 to 9,999,999.

```javascript
var max = 10000000; // 10,000,000 (10 Million)
var arr = [];
for (var i = 0; i <= max; i++) {
    arr.push(i);
}
```

This creates a large array that will be used as the input for both `lodash` and native JavaScript methods.

**HTML Preparation Code**

The HTML preparation code includes a script tag to load the Lodash library version 4.17.21.

```html
<script src="https://cdn.jsdelivr.net/npm/lodash@4.17.21/lodash.min.js"></script>
```

This loads the `lodash` library, which provides the `pullAt` method used in one of the test cases.

**Test Cases**

There are two individual test cases:

1. **Lodash (`_.pullAt(arr, 890047)`)**

This test case uses the `pullAt` method from Lodash to remove elements from the `arr` array at index 890047.

2. **Native JavaScript (`arr.splice(890047, 1)`)**

This test case uses the native JavaScript `splice` method to remove elements from the `arr` array at index 890047.

**Comparison**

The benchmark measures the execution time of both approaches for each test case. The results show that:

* Lodash's `pullAt` method is faster than the native JavaScript `splice` method in this specific scenario.
* However, the difference in performance might be negligible depending on the size of the input array and other factors.

**Pros and Cons**

**Lodash (`_.pullAt(arr, 890047)`)**

Pros:

* Faster execution time compared to native JavaScript `splice`.
* Provides a more convenient and concise way to remove elements from an array.
* Can be useful for complex array operations that involve multiple removals or modifications.

Cons:

* Requires loading the Lodash library, which can add overhead to the benchmark.
* Might not perform well on very large arrays due to memory allocation and garbage collection concerns.

**Native JavaScript (`arr.splice(890047, 1)`)**

Pros:

* No additional overhead from loading a library.
* Can be more efficient for very large arrays, as it uses in-place operations.

Cons:

* Less convenient and less concise than `lodash`'s `pullAt`.
* Might have performance variations depending on the browser or JavaScript engine used.

**Other Considerations**

* The benchmark uses a single array size of 10 million elements. In real-world scenarios, the input array size might be different.
* The test case only removes one element from the array. Depending on the use case, you might need to remove multiple elements or perform other operations on the array.
* The `lodash` library is not the only alternative for array removals; other libraries like Underscore.js or Ramda.js might have similar methods.

**Alternatives**

If you don't want to use Lodash or native JavaScript `splice`, you can consider:

* Using a different library, such as Underscore.js or Ramda.js, which provide similar array manipulation methods.
* Implementing custom array removal logic using native JavaScript techniques, such as using the `Array.prototype.slice()` method and indexing into the array.

Related benchmarks:

lodash pullAt vs native splice (version: 0)

Comparing performance of: lodash vs native

Created: 3 years ago by: Guest

Jump to the latest result

lodash

native

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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