Benchmark: lodash each & lodash map

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) {console.log(v)})
lodash map
_.map(value, function(v,i) {console.log(v)})

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
lodash each
lodash map

Fastest: N/A

Slowest: N/A

Latest run results:

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Autogenerated LLM Summary (model gemma2:9b, generated one year ago):

LLMs can make mistakes. Check important info.

This benchmark tests the performance of two functions from the Lodash library: `_.each` and `_.map`.

**Here's what's being tested:**

* **`_.each(value, function(v,i) {console.log(v)})`**:  Iterates over each element in the `value` array (an array of objects). For each object (`v`), it executes a callback function (anonymous function here) that simply logs the object to the console.
* **`_.map(value, function(v,i) {console.log(v)})`**:  Similar to `_.each`, it iterates over the `value` array. However, for each object (`v`), it executes a callback function that logs the object to the console *and also creates a new array with the results of the callback.*

**Options being compared:** Two different approaches to looping through an array:

* **`_.each`**: Primarily designed for iterating and potentially performing side effects (like logging) on each element.
* **`_.map`**:  Designed to transform each element into a new value, creating a new array as a result.

**Pros & Cons:**

* **`_.each`**: 
    * **Pro:** Simpler syntax if your goal is just to iterate and potentially modify state.
    * **Con:** Doesn't return a new array; you need explicit logic to collect results.
* **`_.map`**:
    * **Pro:**  Creates a new array with transformed values, making it efficient for data manipulation.
    * **Con:** Can be slightly more verbose than `_.each` if your only goal is iteration.

**Other Considerations:**

* **Lodash Library:** Lodash provides a wide range of utility functions, including those for array manipulation (`_.map`, `_.each`). This benchmark highlights the performance difference between these specific functions.

**Alternatives:**

You could achieve similar results using native JavaScript methods:

* **`forEach`**: Similar to `_.each`.
* **`map`**:  Same functionality as `_.map`.

Let me know if you have any other questions about this benchmark or JavaScript performance testing in general!

Related benchmarks:

lodash each & lodash map (version: 0)

Comparing performance of: lodash each vs lodash map

Created: 6 years ago by: Guest

Jump to the latest result

lodash each

lodash map

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

Autogenerated LLM Summary (model gemma2:9b, generated one year ago):