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Array concat vs push
(version: 0)
Compare the new ES6 spread operator with the traditional concat() method and push
Comparing performance of:
Array.prototype.concat vs Push
Created:
4 years ago
by:
Guest
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Tests:
Array.prototype.concat
var arr1 = []; var arr2 = []; for(let i=0; i<10; ++i){ arr1.push("phantasy") arr1.push("joesguns") arr1.push("max-hardware") arr1.push("sigma-cosmetics") arr1.push("harakiri-sushi") arr1.push("foodnstuff") arr1.push("hong-fang-tea") arr1.push("iron-gym") arr2.push("nectar-net") arr2.push("omega-net") arr2.push("silver-helix") arr2.push("zer0") arr2.push("n00dles") arr2.push("neo-net") arr2.push("the-hub") arr2.push("crush-fitness") } var other = arr1.concat(arr2);
Push
var arr1 = []; var arr2 = []; for(let i=0; i<10; ++i){ arr1.push("phantasy") arr1.push("joesguns") arr1.push("max-hardware") arr1.push("sigma-cosmetics") arr1.push("harakiri-sushi") arr1.push("foodnstuff") arr1.push("hong-fang-tea") arr1.push("iron-gym") arr2.push("nectar-net") arr2.push("omega-net") arr2.push("silver-helix") arr2.push("zer0") arr2.push("n00dles") arr2.push("neo-net") arr2.push("the-hub") arr2.push("crush-fitness") } var other = arr1.push(...arr2);
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Suite status:
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Test case name
Result
Array.prototype.concat
Push
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
I'll dive into explaining the benchmark. **What is being tested?** The provided JSON represents a JavaScript microbenchmark that compares two approaches for adding elements to an array: the traditional `concat()` method and the new ES6 spread operator (`...`). **Options compared** There are two test cases: 1. **Array.prototype.concat**: This approach uses the `concat()` method, which concatenates two or more arrays and returns a new array. 2. **Push**: This approach uses the `push()` method, which adds one or more elements to the end of an array. **Pros and cons of each approach** * **Array.prototype.concat**: + Pros: Can handle adding multiple elements at once, allows for more control over the resulting array structure. + Cons: Creates a new array, can be slower than using `push()` for large arrays, and may incur additional memory allocations. * **Push** (using the spread operator): + Pros: More concise and readable syntax, faster execution time, and reduces memory allocations compared to `concat()`. + Cons: May not be as flexible or controlled as `concat()` when adding multiple elements. **Library** None of these approaches rely on a specific library. They are built-in JavaScript methods. **Special JS feature/syntax** The spread operator (`...`) is a new feature introduced in ES6 (ECMAScript 2015). It allows for more concise syntax for adding elements to arrays and objects. **Other considerations** * For large arrays, using `push()` with the spread operator may be faster due to reduced memory allocations. * When adding multiple elements at once, using `concat()` provides more control over the resulting array structure. * The choice between `concat()` and the spread operator ultimately depends on personal preference, coding style, and specific use cases. **Alternatives** Other approaches for adding elements to an array include: * Using a loop with `arr.push()`: This approach is similar to the original implementation but uses a more traditional loop structure. * Using `Array.prototype.set()`: This approach adds all elements from another array to the end of the current array, but it's not supported in older browsers. * Using libraries like Lodash or Ramda for array manipulation; these libraries often provide more functional programming-friendly approaches to array operations. Keep in mind that these alternatives might have different performance characteristics, syntax complexities, and compatibility issues depending on the specific use case.
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