Toggle navigation
MeasureThat
.net
Create a benchmark
Tools
Feedback
Feature Requests
FAQ
Register
Log In
filters vs for loop
(version: 0)
Benchmark.js
Comparing performance of:
filters vs for loop
Created:
2 years ago
by:
Registered User
Go to the latest result
Tests:
filters
let array = ["ab", "ac", "ba", "cd", "bd", "ce", "ae", "bb", "bm", "cm", "dd", "af", "ag", "cf", "dm"] array = [...array, ...array, ...array, ...array, ...array, ...array] array = [...array, ...array, ...array, ...array, ...array, ...array] const a = array.filter((i) => i.startsWith("a")) const b = array.filter((i) => i.startsWith("b"))
for loop
let array = ["ab", "ac", "ba", "cd", "bd", "ce", "ae", "bb", "bm", "cm", "dd", "af", "ag", "cf", "dm"] array = [...array, ...array, ...array, ...array, ...array, ...array] array = [...array, ...array, ...array, ...array, ...array, ...array] const a = [] const b = [] for (let i of array) { if (i.startsWith("a")) { a.push(i) } else if (i.startsWith("b")) { b.push(i) } }
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
Fork
Test case name
Result
filters
for loop
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
2 years ago
)
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36
Browser/OS:
Chrome 120 on Windows
View result in a separate tab
Embed
Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=499810" width="100%" height="500px"></iframe>
for loop
261K/s
filters
230K/s
View exact numbers
Test name
Executions per second
✓
for loop
261,420 Ops/sec
filters
230,364 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the provided benchmark definition and test cases. **Benchmark Definition** The benchmark is defined as a comparison between two approaches: using filters and using a for loop to achieve the same result. The script and HTML preparation codes are empty, which means that the focus is solely on the JavaScript code itself. **Test Cases** There are two test cases: 1. **Filters**: This test case uses the `filter()` method to create an array of elements that start with "a" or "b". The benchmark definition includes the creation of a large array and repeated concatenation operations to generate more data, which is then filtered. 2. **For Loop**: This test case uses a traditional for loop to iterate through the array and push elements into two separate arrays based on whether they start with "a" or "b". **Options Compared** The benchmark compares two approaches: 1. **Filters**: Uses the `filter()` method to create an array of filtered elements. 2. **For Loop**: Uses a traditional for loop to iterate through the array and push elements into two separate arrays. **Pros and Cons of Each Approach** * **Filters**: + Pros: Efficient, concise, and easy to read. + Cons: Can be slower than iterative approaches due to function call overhead. * **For Loop**: + Pros: Can be faster for large datasets since it avoids the function call overhead, but can be more verbose and harder to read. + Cons: More error-prone and less concise. **Library Used** None explicitly mentioned in the provided benchmark definition. However, the `filter()` method is a built-in JavaScript method that creates a new array with elements that meet a condition. **Special JS Feature/Syntax** There are no special JavaScript features or syntax used in this benchmark definition. **Other Considerations** When choosing between filters and for loops, consider the following factors: * Dataset size: For very large datasets, iterative approaches might be faster. * Performance: If speed is critical, a for loop might be a better choice. * Code readability: Filters are generally more concise and easier to read than for loops. **Alternatives** Other alternatives for filtering arrays include: 1. `some()` method 2. Regular expressions (regex) 3. Array.prototype.reduce() 4. Custom iterative approaches using array indices These alternatives might offer different trade-offs in terms of performance, readability, or conciseness, and might be worth exploring depending on the specific use case.
Related benchmarks
Array fill foreach, vs for i loop
foreach vs for vs for in
foreach vs for..of
For loop vs <Array>.forEach() vs for...of loop
Array fill vs for i loop
Comments
Confirm delete:
Do you really want to delete benchmark?