Benchmark: loop/filter test -2

Script Preparation code:

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

Tests:

simple loop
for(let variable of array){ if(variable.startsWith('a')){ result.push(variable); } }
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:

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

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**Benchmark Definition and Script Preparation Code**

The benchmark definition json contains two test cases: "loop/filter test -2" and its corresponding script preparation code:
```javascript
var array = ['aa','ab','ac','sd','df'];
var result = [];
```
This script creates an array `array` containing five elements and initializes an empty array `result`.

**Individual Test Cases**

The benchmark definition json also includes two individual test cases:

1. **"simple loop"`**
```javascript
for(let variable of array){
  if(variable.startsWith('a')){
    result.push(variable);
  }
}
```
This test case uses a traditional `for` loop to iterate over the `array` and filters out elements that do not start with the character 'a'. The filtered elements are pushed onto the `result` array.

2. **"filter"`**
```javascript
result = array.filter(e=>  e.startsWith('a'));
```
This test case uses the `Array.prototype.filter()` method to create a new array containing only elements from the original `array` that start with the character 'a'. The resulting filtered array is assigned back to the `result` variable.

**What's being tested?**

The benchmark tests the performance of these two approaches: traditional loop-based filtering and using the built-in `Array.prototype.filter()` method.

**Options compared**

In this case, there are only two options:

1. **Traditional Loop-Based Filtering**: This approach uses a `for` loop to iterate over the array and filters out elements that do not meet the condition.
2. **Built-in Array.prototype.filter() Method**: This approach uses the `Array.prototype.filter()` method to create a new array containing only elements that meet the condition.

**Pros and Cons**

* **Traditional Loop-Based Filtering**
	+ Pros:
		- Simple to understand and implement
		- Can be more efficient for small arrays or specific use cases
	+ Cons:
		- More verbose and harder to read than using `Array.prototype.filter()`
		- May be slower for large arrays due to the overhead of the loop
* **Built-in Array.prototype.filter() Method**
	+ Pros:
		- More concise and readable than traditional loop-based filtering
		- Faster for large arrays since it uses a optimized algorithm under the hood
	+ Cons:
		- May be less intuitive for developers who are not familiar with this method

**Library Used**

There is no specific library used in these test cases. The `Array.prototype.filter()` method is a built-in JavaScript API.

**Special JS Feature or Syntax**

The only special feature used here is the arrow function syntax (`e => e.startsWith('a')`). This syntax was introduced in ECMAScript 2015 (ES6) and provides a concise way to define small, single-expression functions.

Related benchmarks:

loop/filter test -2 (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):