Benchmark: loop/filter test -3

Script Preparation code:

var array = ['aa','ab','ac','sd','df'];
var result = [];

Tests:

simple loop
for (let index = 0; index < array.length; index++) { if(array[index].startsWith('a')){ result.push(array[index]); } }
filter
result = array.filter(e=> e.startsWith('a'));

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
simple loop
filter

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

This benchmark does not have any results yet. Be the first one to run it!

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

LLMs can make mistakes. Check important info.

Let's break down what's being tested in this benchmark.

**Script Preparation Code and Html Preparation Code**

The script preparation code defines an array `array` containing some strings, and then initializes an empty array `result`. This is just setup code to create the data used for testing. The html preparation code is null, which means no HTML content is prepared before running the test.

**Individual Test Cases**

There are two individual test cases:

1. **"simple loop"`**
This test case uses a traditional JavaScript `for` loop to iterate over the `array`. Inside the loop, it checks if each element starts with 'a' using the `startsWith()` method and pushes the element into the `result` array if true.
2. **"filter"`**
This test case uses the `Array.prototype.filter()` method to create a new array containing only the elements that start with 'a'. The callback function `e => e.startsWith('a')` is applied to each element in the original array.

**What's being tested**

The benchmark is testing two different approaches to filter an array of strings based on a condition:

1. **"simple loop"`**: This test case evaluates the performance of using a traditional JavaScript `for` loop with manual iteration and conditional statements.
2. **"filter"`**: This test case evaluates the performance of using the built-in `Array.prototype.filter()` method, which is designed to efficiently filter arrays.

**Options compared**

The benchmark compares two options:

* **Manual loop**: Using a traditional `for` loop with manual iteration and conditional statements ( tested by "simple loop").
* **Built-in filter**: Using the `Array.prototype.filter()` method, which is designed for efficient filtering of arrays (tested by "filter").

**Pros and Cons**

Here are some pros and cons of each approach:

**Manual Loop**

Pros:

* More control over iteration order and conditional logic.
* Can be more intuitive for certain types of filtering.

Cons:

* Can be slower and more verbose than built-in methods.
* Requires manual memory management (e.g., creating the `result` array).

**Built-in Filter**

Pros:

* Faster execution speed due to optimized C++ implementation.
* More concise code with fewer lines of logic.
* Built-in method is designed for efficient filtering.

Cons:

* Less control over iteration order and conditional logic.
* Can be less intuitive for certain types of filtering.

**Other Considerations**

When choosing between these approaches, consider the following factors:

* Performance: If speed is crucial, the built-in `Array.prototype.filter()` method is likely a better choice. However, if readability and maintainability are more important, the manual loop might be preferred.
* Code simplicity: The built-in filter method is generally more concise and easier to read.
* Control: If you need fine-grained control over iteration order or conditional logic, the manual loop might be necessary.

**Alternative Approaches**

Other alternatives for filtering arrays include:

* Using `Array.prototype.every()` instead of `filter()`, which returns a boolean indicating whether all elements match the condition.
* Using `Array.prototype.some()` instead of `filter()`, which returns a boolean indicating whether at least one element matches the condition.
* Using a library like Lodash or Ramda for functional programming approaches to filtering.

Keep in mind that these alternatives might have different performance characteristics and trade-offs compared to the built-in `Array.prototype.filter()` method.

Related benchmarks:

loop/filter test -3 (version: 0)

Comparing performance of: simple loop vs filter

Created: 3 years ago by: Guest

Jump to the latest result

simple loop

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):