Benchmark: for loop vs. lodash range foreach2

HTML Preparation code:

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/2.4.1/lodash.js"></script>

Script Preparation code:

var arr = [];

for(var i = 0; i < 10000; i++) {
	arr.push({
    	id: i,
      	name: i
    });
}

Tests:

for
var x = 0; for (var i = 0; i < arr.length; i++) { x++; }
array foreach
var x = 0; arr.forEach(function (i) { x++; });
array lodash foreach
var x = 0; _.forEach(arr, function (i) { x++; });

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
for
array foreach
array lodash foreach

Fastest: N/A

Slowest: N/A

Latest run results:

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

LLMs can make mistakes. Check important info.

**Overview of the Benchmark**

The provided JSON represents a JavaScript microbenchmark that compares three approaches for incrementing a variable `x` inside a loop: a traditional `for` loop, an array method `forEach`, and a variation using Lodash's `_forEach`. The benchmark is designed to test which approach is the fastest.

**Options Compared**

The three options being compared are:

1. **Traditional For Loop**: A basic `for` loop that increments a variable `x`.
2. **Array Method foreach**: Using the `forEach` method on an array to increment a variable `x`.
3. **Lodash's _forEach**: Using Lodash's `_forEach` function to increment a variable `x`.

**Pros and Cons of Each Approach**

* **Traditional For Loop**:
	+ Pros: Simple, easy to understand, and well-supported by most browsers.
	+ Cons: May be slower than other approaches due to the overhead of incrementing a variable in each iteration.
* **Array Method foreach**:
	+ Pros: More concise and expressive than traditional loops, can be faster since it avoids incrementing a variable.
	+ Cons: May require more memory allocations or copies, depending on the implementation, which could affect performance.
* **Lodash's _forEach**:
	+ Pros: Built-in function with good performance, can be faster than traditional loops due to optimized implementations.
	+ Cons: Requires including an external library (Lodash), may have higher overhead due to dependency and initialization.

**Library Used**

The benchmark uses Lodash's `_forEach` function. Lodash is a popular utility library for JavaScript that provides various functions for working with arrays, objects, and more. In this case, the `_forEach` function is used to iterate over an array and increment a variable `x`.

**Special JS Features or Syntax**

There are no special JavaScript features or syntaxes used in this benchmark. The code only uses standard JavaScript language constructs.

**Other Alternatives**

Alternative approaches for iterating over arrays could include:

* Using the `map` method to create a new array of values, which may be slower due to the overhead of creating a new array.
* Using the `reduce` method to accumulate values in an array, which may be slower due to the overhead of accumulating and reassigning variables.
* Using a custom iterator or generator function to iterate over the array, which could provide performance benefits but requires more expertise.

In summary, this benchmark compares three approaches for incrementing a variable inside a loop: traditional `for` loops, array method `forEach`, and Lodash's `_forEach`. The results can help developers choose the most efficient approach for their specific use case.

Related benchmarks:

for loop vs. lodash range foreach2 (version: 0)

Comparing performance of: for vs array foreach vs array lodash foreach

Created: 5 years ago by: Guest

Jump to the latest result

for

array foreach

array lodash foreach

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):