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JS arrays..
(version: 1)
Comparing performance of:
Concat vs Push
Created:
6 years ago
by:
Registered User
Jump to the latest result
Script Preparation code:
var toAppend = Array(1).fill("jhd"); var original = [ "first", "second", "third" ];
Tests:
Concat
var res = original.concat(toAppend);
Push
var res = original.push(...toAppend);
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
Fork
Test case name
Result
Concat
Push
Fastest:
N/A
Slowest:
N/A
Latest run results:
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Autogenerated LLM Summary
(model
llama3.1:latest
, generated one year ago):
Let's dive into the world of JavaScript benchmarking! The provided JSON represents a benchmark test case for comparing the performance of two array manipulation methods: `concat` and `push`. **Benchmark Definition** The test case, "JS arrays...", measures the time taken to perform different array operations. The script preparation code creates an original array `original` with three elements and an auxiliary array `toAppend` containing a single element. **Individual Test Cases** There are two test cases: 1. **Concat**: This test case uses the `concat` method to append all elements from the `toAppend` array to the `original` array. 2. **Push**: This test case uses the `push` method to add each element from the `toAppend` array to the end of the `original` array, using the spread operator (`...`) to unpack the auxiliary array. **Latest Benchmark Result** The latest benchmark results show the execution speed (Executions Per Second) for both test cases on a desktop machine running Safari 13 on macOS High Sierra (10.14.6). Now, let's discuss what's being tested and the pros and cons of each approach: **What's Being Tested** Both test cases measure the performance of appending elements to an existing array. * In the **Concat** case, we're using the `concat` method, which creates a new array containing all elements from both arrays. * In the **Push** case, we're using the `push` method, which modifies the original array by adding elements to its end. **Pros and Cons** Here are the key differences between the two approaches: * **Concat**: + Pros: Creates a new array with all elements from both sources, making it suitable for scenarios where you need to preserve the original array. + Cons: May be slower than `push` because it creates a new array. * **Push**: + Pros: Modifies the original array, which can be beneficial when working with large datasets or optimizing memory usage. + Cons: May not be suitable for scenarios where you need to preserve the original array. **Other Considerations** When choosing between `concat` and `push`, consider the following: * If you need to create a new array with all elements from both sources, use **Concat**. * If you're working with large datasets or optimizing memory usage, and modifying the original array is acceptable, use **Push**. **Alternatives** Other alternatives for appending elements to an existing array include: * Using ` splice()` to insert elements at specific indices. * Creating a new array using `map()`, `filter()`, or other methods, depending on your specific requirements. In conclusion, the benchmark test case measures the performance of two array manipulation methods: **Concat** and **Push**. Understanding the pros and cons of each approach will help you choose the best method for your specific use cases.
Related benchmarks:
Splice vs Spread vs Unshift to insert at beginning of array
Splice vs Spread vs Unshift to insert at beginning of array (fixed from slice)
Splice vs Spread vs Unshift vs Push to insert at beginning of array
Splice vs Spread vs Unshift vs Concat to insert at beginning of array (fixed from slice)
Using Splice vs Spread vs Unshift to insert at beginning of array
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