Benchmark: Lodash _forEach vs Native _forEach

HTML Preparation code:

<script src="https://cdn.jsdelivr.net/npm/lodash@4.17.4/lodash.min.js"></script>

Script Preparation code:

var max1 = 100000; // 100,000 (100 Thousand)
var max2 = 10000000; // 10,000,000 (10 Million)
var max3 = 100000000; // 100,000,000 (100 Million)

var arr1 = [];
//for (var i = 0; i <= max1; i++) { arr1.push(i); }

var arr2 = [];
for (var i = 0; i <= max2; i++) { arr2.push(i); }

var arr3 = [];
//for (var i = 0; i <= max3; i++) { arr3.push(i); }

Tests:

Native
arr3.forEach(function (element, index) { element = element*2*15; });
Lodash.js filter
_.each(arr3, function (element, index) { element = element*2*15; });

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Native
Lodash.js filter

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):

LLMs can make mistakes. Check important info.

Measuring the performance of JavaScript microbenchmarks is an essential task for understanding the execution efficiency of different libraries and native code.

**Benchmark Definition**

The provided JSON represents a benchmark that compares the performance of two approaches:

1. **Native `forEach` loop**: The first test case, "Native", measures the performance of a native JavaScript `forEach` loop implemented in the browser's engine.
2. **Lodash.js `_each` function**: The second test case, "Lodash.js filter", uses the Lodash library to implement an `_each` function that iterates over an array.

**Script Preparation Code**

The script preparation code generates three large arrays with increasing sizes (100,000, 10,000,000, and 100,000,000 elements) and pushes each element into the arrays using a `for` loop. These arrays will be used as input for both native `forEach` loops and Lodash.js `_each` functions.

**Html Preparation Code**

The HTML preparation code includes a script tag that loads the Lodash library version 4.17.4 from a CDN, making it available for use in the benchmark.

**Options Compared**

Two options are compared:

1. **Native `forEach` loop**: This is a built-in JavaScript function that iterates over an array using a callback function.
2. **Lodash.js `_each` function**: A utility function provided by the Lodash library that iterates over an array using a callback function.

**Pros and Cons of Each Approach**

### Native `forEach` Loop

Pros:

* No additional overhead from loading a library
* Typically faster than custom implementations due to browser engine optimizations
* Simple to implement

Cons:

* May not be as efficient for very large arrays due to stack size limitations
* Limited control over iteration order and bounds checking

### Lodash.js `_each` function

Pros:

* Provides a familiar and well-maintained API
* Offers more control over iteration order and bounds checking
* Can be optimized further with internal optimizations

Cons:

* Adds overhead from loading the library
* May have slower performance compared to native `forEach` loops due to the additional indirection

**Library: Lodash.js**

Lodash is a popular JavaScript utility library that provides a wide range of functions for tasks such as array manipulation, string iteration, and more. The `_each` function is a part of the Lodash collection and is used to iterate over arrays.

**Special JS Features or Syntax**

The benchmark does not use any special JavaScript features or syntax beyond what's necessary for demonstrating the comparison between native `forEach` loops and Lodash.js `_each` functions.

**Other Alternatives**

If you're interested in exploring other alternatives, here are a few examples:

* **Underscore.js**: Another popular utility library that provides similar functionality to Lodash.
* **Array.prototype.forEach.call()**: A polyfill or shim implementation of the `forEach` method for older browsers or environments where it's not natively supported.
* **Native `for...of` loop**: Some modern JavaScript engines support a `for...of` loop for iterating over arrays, which can offer better performance and control compared to traditional `forEach` loops.

Keep in mind that each of these alternatives has its own strengths, weaknesses, and trade-offs, and the choice ultimately depends on your specific use case and requirements.

Related benchmarks:

Lodash _forEach vs Native _forEach (version: 0)

Comparing performance of: Native vs Lodash.js filter

Created: 6 years ago by: Guest

Jump to the latest result

Native

Lodash.js filter

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):