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forEach vs filtermap2
(version: 0)
Comparing performance of:
forEach vs filter + map
Created:
6 years ago
by:
Guest
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Tests:
forEach
const testArray = [30, 31, 32, 29, 31, 16, 24, 22, 43, 56, 25, 34]; let outpUtArray = []; testArray.forEach(element => { if(element >= 18){ outpUtArray.push(element * element); } });
filter + map
const testArray = [30, 31, 32, 29, 31, 16, 24, 22, 43, 56, 25, 34]; const mapArray = testArray .filter(element => { return element >= 18; }) .map(element => { return element * element; });
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Suite status:
<idle, ready to run>
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Test case name
Result
forEach
filter + map
Fastest:
N/A
Slowest:
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's dive into the world of JavaScript microbenchmarks! MeasuringThat.net is an excellent tool for comparing the performance of different approaches to achieve similar results in JavaScript. The provided JSON benchmark definition represents two test cases: `forEach` and `filter + map`. **Benchmark Definition:** The benchmark definition is a simple script that generates an array of numbers, filters out elements less than 18, and pushes the remaining elements multiplied by themselves into another array. The goal is to compare the performance of two approaches: 1. **`forEach`**: Using the `forEach` method to iterate over the filtered array and push the transformed elements into the output array. 2. **`filter + map`**: Using the `filter` and `map` methods in combination to achieve the same result. **Options Compared:** The two options being compared are: 1. **`forEach`**: Iterates over the array using a callback function, which is executed for each element. 2. **`filter + map`**: Filters out elements that don't meet the condition and then maps the remaining elements to produce the desired output. **Pros and Cons:** * **`forEach`**: + Pros: Simple to implement, easy to understand, and can be used when a single operation is needed. + Cons: Can be slower due to the overhead of iterating over the array using a callback function. * **`filter + map`**: + Pros: Often faster due to caching and reuse of intermediate results, making it suitable for large datasets or complex transformations. + Cons: May have a higher learning curve due to its more verbose syntax. In general, `filter + map` is considered a more efficient approach when dealing with large arrays or complex transformations. However, the performance difference between these two options can be significant, and the choice ultimately depends on the specific use case and requirements. **Library:** There are no libraries explicitly mentioned in the provided benchmark definition. However, it's worth noting that some JavaScript engines and browsers may have built-in optimizations or caching mechanisms that affect the performance of certain methods. **Special JS Feature/Syntax:** The benchmark definition doesn't use any special JavaScript features or syntax. The tests focus on comparing the performance of two fundamental methods (`forEach` and `filter + map`) that are widely used in JavaScript programming. **Alternatives:** Other alternatives for achieving similar results could include: * Using a more advanced method like `reduce()` or `every()` * Implementing a custom iteration loop using a `for...of` loop * Utilizing a library or framework that provides optimized array operations (e.g., Lodash, Ramda) Keep in mind that the choice of alternative will depend on the specific requirements and constraints of your project. I hope this explanation helps you understand the benchmark definition and the options being compared!
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