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Array.prototype.slice vs spread operator-fixed
(version: 0)
Compare the new ES6 spread operator with the traditional slice() method
Comparing performance of:
Array.prototype.slice vs spread operator
Created:
4 years ago
by:
Guest
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Tests:
Array.prototype.slice
var params = [ "hello", true, 7 ]; var other = params.slice();
spread operator
var params = [ "hello", true, 7 ] var other = [ ...params ]
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Suite status:
<idle, ready to run>
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Result
Array.prototype.slice
spread operator
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the provided benchmark and explain what's being tested. **Benchmark Overview** The benchmark compares the performance of two approaches for creating a copy of an array: 1. `Array.prototype.slice()` 2. The new ES6 spread operator (`[ ...params ]`) **Options Being Compared** In this benchmark, only two options are compared: * `Array.prototype.slice()`: A traditional method for creating a shallow copy of an array. * `[ ...params ]`: The spread operator, introduced in ECMAScript 2015 (ES6), which creates a new array by spreading the elements of the original array. **Pros and Cons** **`Array.prototype.slice()`** Pros: * Widely supported across browsers and platforms * Well-established and understood behavior * Simple to use Cons: * May not be as efficient as other methods for large arrays * Can be slower than other approaches due to the overhead of creating a new array object and copying elements **[ ...params ] (Spread Operator)** Pros: * More concise and expressive syntax * Often faster than `Array.prototype.slice()` for small to medium-sized arrays * Part of the ES6 standard, making it widely supported across modern browsers and platforms Cons: * May not be as well understood or widely supported by older browsers or platforms * Can lead to unexpected behavior if used with non-array values or in certain edge cases **Library Usage** In this benchmark, no libraries are explicitly mentioned. However, the use of the spread operator (`[ ...params ]`) relies on modern JavaScript features and the ES6 standard. **Special JS Features/Syntax** The spread operator is a new feature introduced in ECMAScript 2015 (ES6). It allows for creating new arrays by spreading the elements of an existing array. This syntax is not supported in older browsers or platforms that do not implement ES6 standards. **Other Alternatives** If you need to create an array copy, other alternatives include: * `Array.prototype.concat()`: Creates a new array with copies of the elements from the original array. * `Array.prototype.slice.call()`: Calls the `slice()` method on the `Array.prototype` and returns a new array with copies of the elements. * `Array.from()`: Creates a new array with copies of the elements from an iterable (e.g., an array). Keep in mind that each alternative has its own trade-offs and may perform differently depending on the specific use case and JavaScript environment. In conclusion, this benchmark provides a simple and concise way to compare the performance of two approaches for creating an array copy: `Array.prototype.slice()` and the spread operator (`[ ...params ]`). By understanding the pros and cons of each approach, developers can choose the most suitable method for their specific use case.
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