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Delete vs destructure for objects 2
(version: 0)
Measure the performance of delete versus removing a prop from an object
Comparing performance of:
delete vs Rest object
Created:
5 years ago
by:
Guest
Go to the latest result
Script Preparation code:
var obj = { a:1, b:2, c:3 }
Tests:
delete
delete obj.a
Rest object
obj.a = undefined
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
delete
Rest object
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
one year ago
)
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36 Edg/131.0.0.0
Browser/OS:
Chrome 131 on Windows
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=580297" width="100%" height="500px"></iframe>
delete
34.5M/s
Rest object
27.8M/s
View exact numbers
Test name
Executions per second
✓
delete
34,524,028 Ops/sec
Rest object
27,832,478 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
**Overview of the Benchmark** The provided JSON represents a benchmark test on MeasureThat.net, which compares the performance of two approaches to delete or remove properties from an object: using the `delete` keyword and removing a property by setting it to `undefined`. **Test Cases** There are two individual test cases: 1. **Delete**: `delete obj.a` This test case measures the performance of using the `delete` keyword to delete a property from an object. 2. **Rest Object**: `obj.a = undefined` This test case measures the performance of removing a property by setting it to `undefined`. **Options Compared** The two approaches compared are: * Using the `delete` keyword * Removing a property by setting it to `undefined` **Pros and Cons of Each Approach** 1. **Delete Keyword** * Pros: + More concise and expressive + Can be faster since it only removes the property reference, not creates a new variable to store its value * Cons: + Does not remove the property from the object's internal map (e.g., `obj._deleteProperty(obj, 'a')`) + May cause issues with garbage collection if not used carefully 2. **Remove Property by Setting to Undefined** * Pros: + Removes the property from the object's internal map + Can be useful for objects that use a lot of caching or optimization techniques * Cons: + More verbose and less expressive than using `delete` + May cause issues with garbage collection if not used carefully **Library Used** There is no explicit library mentioned in the provided JSON. However, MeasureThat.net may be using some internal implementation details to measure the performance of these operations. **Special JS Feature/Syntax (Not Applicable)** Since neither test case uses any special JavaScript features or syntax beyond basic object manipulation and property deletion, this explanation does not apply. **Other Alternatives** Other approaches to deleting properties from objects might include: * Using a `Map` instead of an object for better performance * Creating a new object with the desired properties removed * Using a library like Lodash's `omit` function Keep in mind that these alternatives may have different performance characteristics and trade-offs depending on the specific use case.
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Delete vs destructure for objects
Delete vs destructure for objects v2 2
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