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Array concat vs spread operator vs push v3
(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:
3 years ago
by:
Guest
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Tests:
Array.prototype.concat
var params = [ "hello", true, 7 ]; var other = [ 1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2 ].concat(params);
spread operator
var params = [ "hello", true, 7 ] var other = [ 1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2 , ...params ]
Push
var params = [ "hello", true, 7 ]; var other = [ 1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2,1, 2 ].push(...params);
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (3)
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Test case name
Result
Array.prototype.concat
spread operator
Push
Fastest:
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Slowest:
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Measuring JavaScript performance is crucial in today's fast-paced web development landscape. Let's break down the provided JSON and explain what's being tested, compared, and considered. **Benchmark Definition:** The benchmark compares three ways to concatenate or append data to an array: 1. **Array.prototype.concat()**: The traditional method of concatenating arrays using the `concat()` method. 2. **Spread operator (`...`)**: A newer method introduced in ES6 that allows for more concise and expressive array creation. 3. **Push with spread operator (`...`)**: Combining the push method with the spread operator to achieve similar results. **Options Compared:** The benchmark tests three options: * `Array.prototype.concat()` * Spread operator (`...`) * Push with spread operator (`...`) Each option has its pros and cons: * **Array.prototype.concat()**: + Pros: Well-established, widely supported. + Cons: Can be slower due to method call overhead, may not be optimized for modern browsers. * **Spread operator (`...`)**: + Pros: More concise, expressive, and efficient, especially for large datasets. + Cons: May require modern browser support (ES6+), some older browsers may not understand it correctly. * **Push with spread operator (`...`)**: + Pros: Combines the benefits of push and spread operators, suitable for both small and large arrays. + Cons: May have performance overhead due to method call, but generally more efficient than concat(). **Library Usage:** None of the test cases use any external libraries. The JavaScript code is self-contained within each benchmark definition. **Special JS Features/Syntax:** The benchmarks make use of the spread operator (`...`), which was introduced in ES6 (ECMAScript 2015). This feature allows for more concise array creation and is widely supported in modern browsers. **Other Alternatives:** In addition to the three options tested, other alternatives exist: * **Array.prototype.slice()**: Creates a shallow copy of an array using `slice()` method. * **Array.prototype.push() with multiple arguments**: Pushes multiple elements onto an array at once. * **Array.prototype.unshift()**: Adds one or more elements to the beginning of an array. However, these alternatives are not explicitly tested in this benchmark, and their performance characteristics might differ from those of the three options being compared. Overall, the benchmark provides a fair comparison of three popular methods for concatenating arrays in JavaScript, highlighting the benefits and trade-offs of each approach.
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