Toggle navigation
MeasureThat.net
Create a benchmark
Tools
Feedback
FAQ
Register
Log In
Push vs Map mastermind 2
(version: 0)
Comparing performance of:
Push vs Join
Created:
2 years ago
by:
Guest
Jump to the latest result
Script Preparation code:
var strs = Array.from(new Array(100)).map(() => ({a: 2, b: 10})) var result = []
Tests:
Push
for (let i = 0; i < strs.length; i++) { if (i > 50) continue result.push(strs[i]) }
Join
result = strs.map((a, i) => i > 50 ? null : a).filter(Boolean)
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
Fork
Test case name
Result
Push
Join
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
gemma2:9b
, generated one year ago):
This benchmark on MeasureThat.net compares two methods for filtering and selecting elements from an array in JavaScript: using the `push()` method and using a combination of `map()` and `filter()`. **Let's break down each approach:** * **`Push` Method:** This test case iterates through the input array (`strs`) using a traditional `for` loop. It checks if the index (`i`) is greater than 50; if not, it adds the current element to a new array (`result`) using `push()`. This method relies on explicit iteration and manipulation of individual elements. * **`Join` Method:** This test case utilizes functional programming techniques. It uses `map()` to transform each element in the array. If the index is greater than 50, it returns `null`; otherwise, it keeps the original element. Then, `filter(Boolean)` removes all `null` values from the resulting array, effectively achieving the same filtering as the `push` method. This approach avoids explicit iteration and relies on higher-order functions for manipulation. **Pros and Cons:** * **`Push` Method:** * **Pros:** Can be more intuitive for beginners who are familiar with traditional loops. * **Cons:** Less concise, can be less performant compared to functional approaches, especially for large arrays. * **`Join` Method:** * **Pros:** More concise, potentially more performant due to the optimized nature of `map()` and `filter()`, reads more like a declarative statement of intent. * **Cons:** Might be less intuitive for beginners who are not familiar with functional programming concepts. **Other Considerations:** The choice between these methods often depends on personal preference, code readability, and performance requirements. For smaller arrays or scenarios where clarity is paramount, the `push` method might be preferable. However, for larger datasets and performance-critical applications, the functional approach using `map()` and `filter()` is generally more efficient and elegant. **Alternatives:** * **`forEach()` with conditional logic:** Similar to `push`, but uses a different loop structure. * **`slice()`:** If you need to create a new array containing only elements before or after a specific index, `slice()` can be a concise option.
Related benchmarks:
Foreach&Push vs Map2
For Push vs Map
spread vs push 3
Push vs Map mastermind
Comments
Confirm delete:
Do you really want to delete benchmark?