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Comparing performance of:
Destructure vs Undefined vs Delete vs New OB
Created:
5 years ago
by:
Guest
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Tests:
Destructure
const user = { email: "123@email.com", password: "AA&Â&A*&AA" }; const { password, ...toBeReturned} = user;
Undefined
const user = { email: "123@email.com", password: "AA&Â&A*&AA" }; user.password = undefined;
Delete
const user = { email: "123@email.com", password: "AA&Â&A*&AA" }; delete user.password;
New OB
const user = { email: "123@email.com", password: "AA&Â&A*&AA" }; const newObj = {email: user.email};
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (4)
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Test case name
Result
Destructure
Undefined
Delete
New OB
Fastest:
N/A
Slowest:
N/A
Latest run results:
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
**Benchmark Overview** MeasureThat.net is a website that allows users to create and run JavaScript microbenchmarks. The provided benchmark definition represents a set of test cases that measure the performance of different operations on a user object. **Script Preparation Code** Since there is no Script Preparation Code specified, it implies that no setup or initialization code is required for these tests. This means that each test case starts with an empty object (`const user = { ... }`) and no additional configuration or preparation is needed. **Options Compared** The benchmark compares four different approaches: 1. **Destructure**: Extracting specific properties from the `user` object using destructuring syntax (`const { password, ...toBeReturned} = user;`). 2. **Undefined**: Setting the `password` property of the `user` object to `undefined`. 3. **Delete**: Deleting the `password` property from the `user` object using the `delete` keyword (`delete user.password;`). 4. **New Object**: Creating a new object with only the `email` property copied from the original `user` object (`const newObj = { email: user.email };`). **Pros and Cons** * **Destructuring**: This approach is concise and readable, but it may lead to unexpected behavior if not used carefully. The destructured properties are returned as values, which can be useful in some cases. * **Undefined**: Setting a property to `undefined` can be a good way to remove its value from an object without deleting it entirely. However, this approach does not update the original object's reference, so modifying the original object will still affect the deleted property. * **Delete**: This approach explicitly removes a property from the object, which can lead to better code organization and reusability. The `delete` keyword also ensures that the original object is not modified accidentally. * **New Object**: Creating a new object with only the desired properties provides a clear separation of concerns and avoids potential conflicts between objects. **Library** None of the provided tests use any external libraries or frameworks. **Special JavaScript Features or Syntax** None of the test cases utilize special JavaScript features or syntax, such as async/await, promises, or TypeScript. **Alternatives** Some alternative approaches to these benchmarked operations include: * Using the `Object.assign()` method to create a new object with specific properties. * Employing the spread operator (`{ ... }`) to create a shallow copy of an object's properties. * Utilizing libraries like Lodash or Ramda for functional programming and utilities. While these alternatives exist, MeasureThat.net focuses on measuring the performance of basic JavaScript operations, making it easier for developers to compare and understand different approaches in their own projects.
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