Toggle navigation
MeasureThat.net
Create a benchmark
Tools
Feedback
FAQ
Register
Log In
Arrays Merge
(version: 0)
Comparing performance of:
Concat and Push - Map vs Concat and Push - FlatMap vs Concat and Assign - FlatMap vs Concat and Assign - Map
Created:
4 years ago
by:
Registered User
Jump to the latest result
Tests:
Concat and Push - Map
var init=[10,11,12,13]; var params = [{val: [1,2]}, {val: [3,4]}, {val: [5,6]}, {val: [7,8]}]; init.push(...params.map(x=>x.val)); console.log(init);
Concat and Push - FlatMap
var init=[10,11,12,13]; var params = [{val: [1,2]}, {val: [3,4]}, {val: [5,6]}, {val: [7,8]}]; init.push(...(params.flatMap(x => x.val))); console.log(init);
Concat and Assign - FlatMap
var init=[10,11,12,13]; var params = [{val: [1,2]}, {val: [3,4]}, {val: [5,6]}, {val: [7,8]}]; init = init.concat(...params.flatMap(x=>x.val)); console.log(init);
Concat and Assign - Map
var init=[10,11,12,13]; var params = [{val: [1,2]}, {val: [3,4]}, {val: [5,6]}, {val: [7,8]}]; init = init.concat(...params.map(x=>x.val)); console.log(init);
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (4)
Previous results
Fork
Test case name
Result
Concat and Push - Map
Concat and Push - FlatMap
Concat and Assign - FlatMap
Concat and Assign - Map
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
llama3.2:3b
, generated one year ago):
I'd be happy to help explain what's being tested on MeasureThat.net. The benchmark measures the performance of different ways to concatenate and push or assign arrays in JavaScript. **What is being compared:** 1. `push` with `map`: This approach uses the `map()` method to transform the inner array into an array, and then pushes all the elements from this new array onto the outer array. 2. `concat` with `map`: Similar to the previous one, but instead of using `push`, it uses the `concat()` method to concatenate the arrays. 3. `flatMap` with `push`: This approach uses the `flatMap()` method to flatten the inner arrays into a single array, and then pushes all the elements from this new array onto the outer array. 4. `concat` with `flatMap`: Similar to the previous one, but instead of using `push`, it uses the `concat()` method to concatenate the arrays. **Options:** 1. **`map()`**: This method transforms each element in an array into a new value, returning an array of these values. 2. **`flatMap()`**: Similar to `map()`, but also flattens any nested arrays returned by the callback function. 3. **`concat()`**: This method returns a new array containing all elements from the original arrays. **Pros and Cons:** 1. **`push()` with `map` and `flatMap`**: * Pros: Simple, straightforward approach that takes advantage of modern JavaScript features. * Cons: Can be slower than other methods due to the overhead of creating a new array and pushing elements onto it. 2. **`concat()` with `map` and `flatMap`**: * Pros: Can be faster than `push()` approaches since it uses a built-in method for concatenating arrays. * Cons: May incur additional overhead due to the creation of temporary arrays during concatenation. 3. **`flatMap()`**: This approach can be particularly useful when dealing with nested arrays, as it allows for efficient flattening and processing. **Library usage:** None apparent in this benchmark definition. **Special JS feature or syntax:** The `flatMap()` method is a relatively new addition to the JavaScript standard library, introduced in ECMAScript 2019. It's an alternative to the `map()` method that also flattens any nested arrays returned by the callback function. **Other alternatives:** If not using `push`, `concat`, or `flatMap`, some developers might resort to using a `for` loop or other iteration methods to concatenate and assign arrays. However, these approaches are generally less efficient than the ones being compared in this benchmark. Overall, MeasureThat.net provides a useful tool for evaluating performance differences between various array manipulation techniques in JavaScript, helping users optimize their code for better performance.
Related benchmarks:
Concat VS Spread operator benchmark
Sorting test
spread/concat large
Merge 3 small arrays
Merging two arrays
Comments
Confirm delete:
Do you really want to delete benchmark?