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Compare Concat->Push with Spread->Concat
(version: 2)
Compare Concat->Push with Spread->Concat
Comparing performance of:
Concat and Push vs Spread And Concat
Created:
4 years ago
by:
Registered User
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Tests:
Concat and Push
var init = [10,11,12,13]; var params = [ [1, 2], [3,4 ], [5, 6], [7, 8 ]]; init.push(...([]).concat(...params)); console.log(init);
Spread And Concat
var init = [10,11,12,13]; var params = [ [1, 2], [3,4 ], [5, 6], [7, 8 ]]; init = init.concat(...params); console.log(init);
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Suite status:
<idle, ready to run>
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Test case name
Result
Concat and Push
Spread And Concat
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the provided benchmark and its test cases. **What is being tested?** The benchmark compares two approaches to merge arrays in JavaScript: 1. **Concat->Push**: This approach involves using the `concat()` method to merge an array with another array, followed by using the spread operator (`...`) to push elements from a third array into the resulting array. 2. **Spread->Concat**: This approach involves using the spread operator (`...`) to merge two arrays, and then using the `concat()` method to concatenate the result with another array. **Options compared** The benchmark compares these two approaches: * **Approach 1: Concat->Push** + Uses `concat()` to merge an array with another array + Uses `push()` to add elements from a third array to the resulting array * **Approach 2: Spread->Concat** + Uses spread operator (`...`) to merge two arrays + Uses `concat()` to concatenate the result with another array **Pros and Cons of each approach** **Concat->Push (Approach 1)** Pros: * Typically faster than spread operators, since `push()` is a low-cost operation compared to `concat()` * Can be more memory-efficient, since it avoids creating intermediate arrays * Well-supported by most browsers and JavaScript engines Cons: * Can lead to performance issues if the input arrays are large or complex * May have higher memory overhead due to the creation of temporary arrays **Spread->Concat (Approach 2)** Pros: * Generally faster than `concat()` for merging small to medium-sized arrays * More concise and expressive code * Easier to read and maintain, as it avoids the need for explicit array manipulation Cons: * Can be slower than `push()` for very large or complex arrays due to the overhead of creating intermediate arrays * Less supported by older browsers and JavaScript engines **Library usage** There is no library used in this benchmark. **Special JS features or syntax** The benchmark uses the following special feature/syntax: * Spread operator (`...`) The spread operator was introduced in ECMAScript 2015 (ES6) as a way to expand an array into individual elements, allowing for more concise and expressive code. It is widely supported by modern browsers and JavaScript engines. **Alternative approaches** Other alternatives for merging arrays include: * Using `Array.prototype.reduce()` or `Array.prototype.flatMap()` * Using libraries like Lodash or Ramda * Using other array methods like `Array.prototype.slice()` or `Array.prototype.splice()` However, these alternatives may not be as efficient or concise as the spread operator and `concat()` combination used in this benchmark.
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