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Array concat vs spread operator vs push mine
(version: 0)
Compare the new ES6 spread operator with the traditional concat() method and push
Comparing performance of:
Array.prototype.concat vs spread operator vs Push
Created:
5 years ago
by:
Guest
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Tests:
Array.prototype.concat
var params = [ 3 ]; var other = [ 1, 2 ].concat(params);
spread operator
var params = [ 3 ] var other = [ 1, 2, ...params ]
Push
var other = [ 1, 2 ].push(3);
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Suite status:
<idle, ready to run>
Run tests (3)
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Test case name
Result
Array.prototype.concat
spread operator
Push
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 benchmark and explain what's being tested. **Benchmark Overview** The benchmark is designed to compare three different approaches for concatenating arrays in JavaScript: 1. `Array.prototype.concat()` 2. The new ES6 spread operator (`...`) 3. Manual `push()` method **Options Compared** * **`Array.prototype.concat()`**: This is the traditional way of concatenating arrays using the `concat()` method. * **Spread Operator (`...`)**: Introduced in ES6, this operator allows you to expand an array into a new array by including all elements from the original array. * **Manual `push()` method**: In this approach, each element is pushed onto the end of the existing array using the `push()` method. **Pros and Cons** * **`Array.prototype.concat()`**: + Pros: Wide browser support, easy to use. + Cons: Can be slower for large arrays due to the overhead of creating a new array object. * **Spread Operator (`...`)**: + Pros: Efficient, readable, and concise. + Cons: Requires ES6 compatibility, might not work in older browsers. * **Manual `push()` method**: + Pros: Can be faster for large arrays since it only updates the existing array. + Cons: More verbose, less readable. **Library Usage** None of the test cases use a specific library. They rely on built-in JavaScript features and standard library functions. **Special JS Features/Syntax** The spread operator (`...`) is the only feature that requires ES6 compatibility. This means that browsers older than Firefox 88 (the one running this benchmark) might not support it. **Other Alternatives** For larger arrays or performance-critical code, you might also consider using other methods like: * `Array.prototype.set()`: A more modern way of updating an array's length and filling its elements. * `Array.from()`: Creating a new array from an existing iterable. * Optimized libraries like Lodash's `concat` function. Keep in mind that the choice of method depends on your specific use case, performance requirements, and target browser support.
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