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Object copy JSON vs Object.assign
(version: 0)
Comparing performance of:
Spread vs JSON
Created:
5 years ago
by:
Guest
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Tests:
Spread
let object = {...{foo: "bar"}}
JSON
let object = JSON.parse(JSON.stringify({...{foo: "bar"}}))
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
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Test case name
Result
Spread
JSON
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
I'd be happy to explain the benchmark and its various components. **What is being tested?** The provided JSON represents a JavaScript microbenchmark on MeasureThat.net, which compares two approaches for creating a copy of an object: 1. **Object spread (using the spread operator)**: `let object = {...{foo: "bar"}}` 2. **JSON parsing**: `let object = JSON.parse(JSON.stringify({...{foo: "bar"}}))` **Options being compared** The benchmark compares these two approaches to create a copy of an object. The primary goal is to measure the performance difference between creating an object using the spread operator versus using JSON parsing. **Pros and cons of each approach** 1. **Object spread (using the spread operator)**: * Pros: Simple, concise syntax, efficient in terms of memory usage. * Cons: May not work as expected when dealing with complex objects or nested structures. 2. **JSON parsing**: * Pros: Works well with complex objects and nested structures, provides a more explicit way to create an object copy. * Cons: May be slower due to the overhead of parsing JSON. **Other considerations** * The benchmark uses two identical test cases (`object = {...{foo: "bar"}}`) for both approaches, which ensures a fair comparison. However, in real-world scenarios, you might encounter different objects with varying properties and complexity. * The benchmark assumes that the input object is small to medium-sized, as creating large objects can lead to performance issues. **Library usage** None of the test cases explicitly uses any libraries or external dependencies for their implementation. **Special JavaScript features or syntax** The use of the spread operator (`{...}`) is a modern JavaScript feature introduced in ECMAScript 2015 (ES6). It allows for concise object creation and copying. The JSON parsing method, on the other hand, relies on the `JSON` object and its methods. **Other alternatives** If you wanted to test alternative approaches, some options could be: * Using a library like Lodash or Underscore.js, which provides utility functions for creating object copies. * Implementing a custom clone function using recursion or iteration. * Using a different data structure, such as an array with `push` and `slice`, to create an object copy. Keep in mind that these alternatives might introduce additional complexity or overhead compared to the original approaches being tested.
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