Benchmark: lodash each & lodash map & native forEach return v

HTML Preparation code:


<script src='https://cdn.jsdelivr.net/npm/lodash@4.17.10/lodash.min.js'></script>

Script Preparation code:

var value = [{a: 30310}, {b: 100303}, {c: 3040494}, {d: 6542321}, {e: 13123531}]

Tests:

lodash each
_.each(value, function(v,i) {return v})
lodash map
_.map(value, function(v,i) {return v})
native forEach
value.forEach(function(v,i) {return v})

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
lodash each
lodash map
native forEach

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 5 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.149 Safari/537.36

Browser/OS: Chrome 80 on Mac OS X 10.15.3

View result in a separate tab

Test name	Executions per second
lodash each	3117085.5 Ops/sec
lodash map	2961371.0 Ops/sec
native forEach	14329053.0 Ops/sec

Autogenerated LLM Summary (model llama3.2:3b, generated 6 months ago):

LLMs can make mistakes. Check important info.

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

The test consists of three individual microbenchmarks that measure the performance of different JavaScript iteration methods:

1. `_.each(value, function(v,i) {return v})`: This benchmark uses the Lodash library to iterate over an array using the `each` method.
2. `_.map(value, function(v,i) {return v})`: This benchmark also uses the Lodash library to iterate over an array using the `map` method.
3. `value.forEach(function(v,i) {return v})`: This benchmark tests the native `forEach` method of JavaScript arrays.

**Lodash Libraries**

In this benchmark, two libraries are used:

* `lodash` (version 4.17.10): A popular utility library that provides a set of functional programming helpers.
* The Lodash `each` and `map` methods are used to iterate over the `value` array.

**Native JavaScript Methods**

The native `forEach` method is tested as well, which is part of the ECMAScript standard and does not require any libraries or additional setup.

**Benchmark Options Compared**

In this benchmark, three options are compared:

* Lodash's `each` method
* Lodash's `map` method
* Native JavaScript's `forEach` method

Each option has its pros and cons:

* **Lodash's each and map methods**: These methods provide a convenient way to iterate over arrays using functional programming principles. However, they may introduce additional overhead due to the creation of new arrays (in the case of `map`) or additional memory allocations. Additionally, since these functions are part of the Lodash library, users need to include the library in their codebase.
* **Native JavaScript's forEach method**: This is a lightweight and efficient way to iterate over arrays, as it does not require any additional memory allocations or creation of new data structures. However, it may be less convenient than using higher-order functions like `each` and `map`, especially for developers unfamiliar with these methods.

**Other Considerations**

* The benchmark measures the performance of each option by executing a simple expression (`return v`) over an array of values. This is a simplified test case that does not cover all possible scenarios, so results should be interpreted with caution.
* The benchmark uses Chrome 80 as the test browser and Mac OS X 10.15.3 as the operating system. Results may vary on other platforms or browsers.

**Alternatives**

If you're interested in exploring alternative iteration methods for your own use cases, consider the following:

* **Array.prototype.reduce()**: This method is another common way to iterate over arrays using a callback function.
* **Array.prototype.filter()`: This method can be used as part of an iterative solution to filter elements from an array.
* **Generator functions**: For modern JavaScript environments (ES6+), consider using generator functions to iterate over arrays or other data structures.

Keep in mind that the choice of iteration method depends on your specific use case, performance requirements, and personal preference.

Related benchmarks:

lodash each & lodash map & native forEach return v (version: 0)

Comparing performance of: lodash each vs lodash map vs native forEach

Created: 5 years ago by: Guest

Jump to the latest result

lodash each

lodash map

native forEach

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 6 months ago):