Benchmark: Underscore map vs Array map

HTML Preparation code:

<script src='https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.8.3/underscore-min.js'></script>

Script Preparation code:

var primes = [2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71,73,79,83,97]

Tests:

Underscore map
var result = _.map(primes,(prime) => {return prime});
Array map
var result = primes.map((prime) => {return prime});

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Underscore map
Array map

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/135.0.0.0 Safari/537.36

Browser/OS: Chrome 135 on Windows

View result in a separate tab

Test name	Executions per second
Underscore map	16396075.0 Ops/sec
Array map	17599966.0 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 definition and test cases.

**Benchmark Definition:**
The benchmark compares two approaches to perform mapping operations on an array of numbers (primes): using the `_.map()` function from the Underscore.js library, and using the native `Array.prototype.map()` method in JavaScript.

**Script Preparation Code:**
The script preparation code defines an array of prime numbers (`primes`).

```javascript
var primes = [2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71,73,79,83,97];
```

**HTML Preparation Code:**
The HTML preparation code includes a reference to the Underscore.js library.

```html
<script src='https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.8.3/underscore-min.js'></script>
```

**Individual Test Cases:**

1. **Underscore map:**
   The first test case uses the `_.map()` function from Underscore.js to perform mapping operations on the `primes` array.
   ```javascript
var result = _.map(primes,(prime) => {return prime});
```
   This approach relies on the Underscore.js library, which provides a convenient way to perform common functional programming tasks.

2. **Array map:**
   The second test case uses the native `Array.prototype.map()` method in JavaScript to perform mapping operations on the `primes` array.
   ```javascript
var result = primes.map((prime) => {return prime});
```
   This approach is a built-in part of JavaScript and does not rely on any external libraries.

**Options Compared:**

* The two options being compared are:
	+ Using the Underscore.js library (`_.map()`) vs.
	+ Using the native `Array.prototype.map()` method in JavaScript.
* These two approaches have different performance characteristics due to various factors, such as:
	+ Overhead of function calls and variable lookups with Underscore.js
	+ Optimizations implemented by the JavaScript engine for native methods

**Pros and Cons:**

* **Underscore.js (`_.map()`):**
  Pros:
  - Simplifies functional programming tasks
  - Can provide a more consistent and predictable API
  - May offer better performance in certain scenarios due to caching and memoization
  - Reduces the need for manual loop-based iteration

Cons:
  - Requires an additional external library, which can introduce latency and overhead
  - May not be optimized for specific use cases or workloads
* **Native `Array.prototype.map()`:**
Pros:
- Built-in to JavaScript, reducing the need for external libraries
- Can offer better performance in many scenarios due to engine optimizations
- Simplifies code by eliminating the need for explicit loop-based iteration

Cons:
- May not provide a consistent API across all browsers or environments
- Can result in slower performance in certain edge cases due to overhead of function calls and variable lookups

**Library:**
Underscore.js is a popular JavaScript library that provides a set of functional programming helpers, including `_.map()`. It's designed to simplify common tasks and provide a consistent API.

**Special JS Feature or Syntax:**
This benchmark does not rely on any special features or syntax specific to modern JavaScript versions. Both test cases use standard JavaScript syntax and features.

**Alternatives:**

* For building more complex data processing pipelines, you may consider using other libraries like Lodash or Ramda.
* If performance is a critical concern, you might explore optimizing the native `Array.prototype.map()` method or leveraging specialized libraries for high-performance data processing.

Related benchmarks:

Underscore map vs Array map (version: 0)

Underscore map vs Array map

Comparing performance of: Underscore map vs Array map

Created: 5 years ago by: Guest

Jump to the latest result

Underscore map

Array map

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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