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(version: 0)
Comparing performance of:
Using the spread operator vs Using Object.assign
Created:
3 years ago
by:
Guest
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Tests:
Using the spread operator
const secondObject = { moreData: 'foo bar' } const finalObject = { ...secondObject };
Using Object.assign
const secondObject = { moreData: 'foo bar' } const finalObject = Object.assign({}, secondObject);
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
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Test case name
Result
Using the spread operator
Using Object.assign
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
I'll break down the provided benchmark for you. **Benchmark Definition** The benchmark definition is an empty JSON object, which means that it doesn't specify any specific code or functionality to be tested. This suggests that the benchmark is more focused on comparing different approaches or libraries rather than measuring a specific performance characteristic of JavaScript. **Individual Test Cases** There are two test cases: 1. **Using the spread operator**: This test case uses the spread operator (`...`) to create a new object by copying properties from another object, `secondObject`. The resulting object is assigned to `finalObject`. 2. **Using Object.assign**: This test case uses the `Object.assign()` method to copy properties from `secondObject` and assign them to `finalObject`. **Options Compared** The two options being compared are: * Using the spread operator (`...`) to create a new object * Using `Object.assign()` to copy properties from one object to another **Pros and Cons of Each Approach** * **Using the spread operator (...) + Pros: - More concise and expressive syntax - Creates a new object without modifying the original object - Can be used with other types of data structures, such as arrays + Cons: - May not work in older browsers or environments that don't support the spread operator - Can lead to unexpected behavior if not used carefully (e.g., when dealing with inherited properties) * **Using Object.assign()** + Pros: - Widely supported across different browsers and environments - Allows for more control over the copying process (e.g., specifying which properties to copy) - Can be used with older JavaScript versions that don't support the spread operator + Cons: - Less concise syntax compared to the spread operator - May create a new object, but also modifies the original object if not careful **Library or Framework Used** Neither of these test cases uses any external libraries or frameworks. The code snippets are self-contained and only rely on built-in JavaScript features. **Special JS Feature or Syntax** There is no special JavaScript feature or syntax used in these test cases beyond what's standard to the language. **Other Alternatives** For creating new objects with inherited properties, other alternatives include: * Using a library like Lodash (`_.cloneDeep()`) or Ramda (`R.clone()`), which provides more advanced options for cloning and merging objects. * Implementing a custom function for copying objects, taking into account the complexities of inherited properties. Keep in mind that these alternative approaches may have different trade-offs in terms of performance, readability, and compatibility with various browsers and environments.
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