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structuredClone vs spread object comparison
(version: 0)
Comparing performance of:
structuredClone vs Spread
Created:
3 years ago
by:
Guest
Jump to the latest result
Script Preparation code:
var voucher = { "single": false, "applyOverTaxes": false, "discountType": "1", "value": 100, "minimumAmount": 0, "quantity": 1, "suffixLength": 8, "code": "IF5R0AFX", "vertical": [], "allowedPaymentMethods": [], "allowedBanks": [], "types": [], "partners": [], "startDate": "2020-10-21T00:00:00.000Z", "endDate": "2020-10-21T00:00:00.000Z", "applyed": false }
Tests:
structuredClone
const copy = window.structuredClone(voucher);
Spread
const copy = { ...voucher };
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
structuredClone
Spread
Fastest:
N/A
Slowest:
N/A
Latest run results:
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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 Definition** The benchmark is comparing two approaches to create a copy of an object: `structuredClone` and the spread operator (`{ ...voucher };`). **Options Compared** Two options are compared: 1. **`structuredClone`**: This method creates a deep copy of an object, recursively copying all its properties and values. It's a relatively new method introduced in JavaScript 2020. 2. **Spread Operator (`{ ...voucher }`)**: This operator creates a shallow copy of an object by spreading its keys and values into a new object. **Pros and Cons** * **`structuredClone`**: Pros: + Creates a deep copy, which is essential for preserving complex objects with nested structures. + Can be more efficient than the spread operator for large objects. * Cons: + Introduced relatively recently, so browser support might not be as wide as other methods (although it's included in Chrome 110). * **Spread Operator (`{ ...voucher }`)**: Pros: + Widely supported by modern browsers and Node.js. + Fast and efficient for shallow copies. * Cons: + Only creates a shallow copy, which can lead to issues when dealing with complex objects. **Library Used** None explicitly mentioned in the benchmark. However, the `structuredClone` method is implemented as part of the JavaScript standard library since 2020. **Special JS Feature or Syntax** There's no mention of any special JavaScript features or syntax in this benchmark. **Other Alternatives** If you need to create a deep copy of an object and don't want to use `structuredClone`, other alternatives include: * **JSON.parse(JSON.stringify(voucher))**: This method creates a deep copy by parsing the original object as JSON and then parsing the resulting string back into an object. However, this method can be slower and less efficient than `structuredClone`. * **Object.assign(Object.create(null), voucher)**: This method creates a new object with the same properties as the original object, using `Object.create(null)` to create an empty prototype chain. These alternatives might not be as efficient or intuitive as `structuredClone`, but they can still get the job done in a pinch.
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