Benchmark: filter vs es6 vs for loop vs forEach

Tests:

filter
const words = ["spray", "limit", "elite", "exuberant", "destruction", "present"]; const result = words.filter(function(word) { return word.length > 6 });
for loop
const words = ["spray", "limit", "elite", "exuberant", "destruction", "present"]; const result = [] for (let i = 0; i < words.length; i += 1) { const word = words[i]; if (word.length > 6) { result.push(word); } }
forEach
const words = ["spray", "limit", "elite", "exuberant", "destruction", "present"]; const result = [] words.forEach(function(word) { if (word.length > 6) { result.push(word); } });
es6
const words = ['spray', 'limit', 'elite', 'exuberant', 'destruction', 'present']; const result = words.filter((word) => word.length > 6);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
filter
for loop
forEach
es6

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/116.0.0.0 Safari/537.36

Browser/OS: Chrome 116 on Windows

View result in a separate tab

Test name	Executions per second
filter	69292640.0 Ops/sec
for loop	70519656.0 Ops/sec
forEach	73507896.0 Ops/sec
es6	74667560.0 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark definition and test cases to understand what is being tested.

**Benchmark Definition**

The benchmark definition is a JSON object that contains metadata about the benchmark, such as its name, description, script preparation code, and HTML preparation code. In this case, the benchmark is called "filter vs es6 vs for loop vs forEach" and has four test cases: `filter`, `for loop`, `forEach`, and `es6`.

**Test Cases**

Each test case represents a different implementation of filtering an array to include only elements that meet a certain condition. The implementations are:

1. **Filter**: This is the traditional JavaScript method for filtering arrays.
2. **For Loop**: This implementation uses a classic for loop to iterate over the array and push elements to a new array if they meet the condition.
3. **ForEach**: This implementation uses the `forEach` method to iterate over the array and push elements to a new array if they meet the condition.
4. **Es6**: This is an example of how the syntax can be written in ECMAScript 2015 (ES6) style, using arrow functions.

**Library**

None of these test cases rely on any external libraries, but they do use built-in JavaScript methods and operators.

**Special JS Feature/Syntax**

The `forEach` method was introduced in ES5 (not ES6), so it's a relatively old feature. The arrow function syntax (`=>`) is a shorthand for traditional function declarations and is part of the ES6 specification.

Now, let's discuss the pros and cons of each approach:

* **Filter**: This is the most straightforward implementation, but it can be slower due to the overhead of creating a new array.
* **For Loop**: This implementation requires more boilerplate code and can be slower than the other options because it creates a new array and performs additional work.
* **ForEach**: This implementation uses less memory and has fewer lines of code than the for loop, but it's not as readable due to its concise nature.
* **Es6**: This syntax is clear and concise, but it may not be immediately recognizable to all developers.

**Other Alternatives**

If you wanted to test different filtering methods, you could consider adding more test cases, such as:

* Using `Array.prototype.filter.call()`
* Using a custom function with a callback
* Using an alternative library like Lodash or Ramda
* Testing a modified version of the for loop that uses a single pass through the array

Keep in mind that these alternatives may change the performance characteristics and readability of the code.

In terms of running this benchmark, it's likely that MeasureThat.net will use a web browser to execute each test case multiple times (the number of executions is specified as 74667560.0 for the "es6" test) and measure the time taken by each implementation to complete the filtering task. The results can be used to compare the performance characteristics of different implementations.

Related benchmarks:

filter vs es6 vs for loop vs forEach (version: 0)

Comparing performance of: filter vs for loop vs forEach vs es6

Created: one year ago by: Guest

Jump to the latest result

filter

for loop

forEach

es6

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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