Benchmark: for forEach fixed

Script Preparation code:

var list34 = ['str_1', 'str_3', 'str_4', 'str_5', 'str_6', 'str_7', 'str_8',
  'mn_1', 'mn_2']

Tests:

forEach
list34.forEach(column => { console.log(column) })
for
for(var i = 0; i < list34.length; i++){ console.log(list34[i]) }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
forEach
for

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:134.0) Gecko/20100101 Firefox/134.0

Browser/OS: Firefox 134 on Linux

View result in a separate tab

Test name	Executions per second
forEach	24152.9 Ops/sec
for	25682.7 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 and explain what is being tested.

**Benchmark Overview**

The provided benchmark measures the performance of two different ways to iterate over an array in JavaScript: `for` loops and `forEach` methods. The benchmark is comparing the execution speed of these two approaches on a specific dataset, which is stored in the `list34` variable.

**Script Preparation Code**

The script preparation code is a snippet of JavaScript that creates a sample array `list34` containing 8 strings. This array will be used as the test data for both iterations.

```javascript
var list34 = ['str_1', 'str_3', 'str_4', 'str_5', 'str_6', 'str_7', 'str_8', 'mn_1', 'mn_2'];
```

**Comparison of Options**

The two options being compared are:

1. **`for` loops**: A traditional `for` loop iterates over the array using an index variable.
```javascript
for(var i = 0; i < list34.length; i++) {
    console.log(list34[i]);
}
```
2. **`forEach` methods**: The `forEach` method is a built-in JavaScript function that allows iterating over arrays without needing to declare an index variable.

**Pros and Cons**

* **`for` loops**:
	+ Pros: Can be more efficient for large datasets, as it avoids the overhead of the `forEach` method's callback.
	+ Cons: Requires declaring an index variable, which can be error-prone.
* **`forEach` methods**:
	+ Pros: Easy to use, no need to declare an index variable, and provides a clear and concise way to iterate over arrays.
	+ Cons: May incur performance overhead due to the callback function.

**Library and Syntax**

There is no external library used in this benchmark. However, it's worth noting that the `forEach` method is a part of the JavaScript standard library, which means it's included with every modern JavaScript engine.

No special JavaScript features or syntax are being tested in this benchmark.

**Other Alternatives**

If you wanted to test other iteration methods, you could consider:

* **`while` loops**: Another traditional loop type that can be used to iterate over arrays.
* **`map()`, `filter()`, and `reduce()``: These array methods provide alternative ways to process arrays, but may not be as suitable for simple iteration tasks.

Keep in mind that each iteration method has its own trade-offs, and the choice of which one to use depends on the specific requirements of your project.

Related benchmarks:

for forEach fixed (version: 0)

Comparing performance of: forEach vs for

Created: 4 years ago by: Guest

Jump to the latest result

forEach

for

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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