Benchmark: delete vs undefined vs null - 4

Script Preparation code:

test = {
    test: [
    ]
}

for(let i = 0; i < 500; i++){
  test.test[i] = {hello: {msg: 'your mom'}}
}

Tests:

delete
test.test.forEach(hello => delete hello.msg)
undefined
test.test.forEach(hello => hello.msg = undefined)
null
test.test.forEach(hello => hello.msg = null)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
delete
undefined
null

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

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Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):

LLMs can make mistakes. Check important info.

Measuring the performance of different approaches to delete, set to undefined, and set to null values in JavaScript is an interesting benchmark.

**What is being tested?**

In this benchmark, three individual test cases are compared:

1. `delete` approach: This involves using the `delete` keyword to delete a property from an object.
2. `undefined` approach: This involves setting a property to `undefined`.
3. `null` approach: This involves setting a property to `null`.

The benchmark is designed to measure which approach is fastest in terms of execution time.

**Options compared**

* `delete`: Using the `delete` keyword to delete a property from an object.
* `undefined`: Setting a property to `undefined`.
* `null`: Setting a property to `null`.

**Pros and cons of each approach:**

* `delete`:
	+ Pros: Can be used when you want to explicitly remove a property from an object, which can help with code readability and maintainability.
	+ Cons: May not be supported in all browsers or environments, and it can lead to unexpected behavior if the property is deleted while still referenced by another variable.
* `undefined`:
	+ Pros: Wide support across browsers and environments, as setting a value to `undefined` doesn't affect the object's reference count.
	+ Cons: Can be less readable than using the `delete` keyword, especially in complex codebases.
* `null`:
	+ Pros: Similar to `undefined`, with wide support across browsers and environments. Setting a property to `null` can also help with memory management.
	+ Cons: May not be as intuitive or readable as other approaches, as it's more commonly used for primitive types (e.g., numbers, strings) rather than objects.

**Library usage**

None of the test cases explicitly use any libraries.

**Special JavaScript features or syntax**

* None mentioned in this benchmark.

**Other considerations**

The benchmark doesn't account for:

* Object mutation order: In some browsers, the order of object property mutations can affect performance.
* Garbage collection: The timing of garbage collection events may impact the execution time of these tests.
* Other optimizations: Some browsers or environments may optimize away certain instructions that would be present in a real-world application.

**Alternatives**

Other approaches to deleting properties from objects include:

* `Object.defineProperty()` and `Object.deleteProperty()`: These methods are part of the ECMAScript standard and provide more fine-grained control over property definitions.
* `for...in` loop: This can be used to iterate over an object's properties, but it may not be as efficient as other approaches.

Overall, this benchmark provides a useful comparison of different approaches to deleting properties from objects in JavaScript. It helps developers understand the trade-offs between these approaches and make informed decisions about which one to use in their code.

Related benchmarks:

delete vs undefined vs null - 4 (version: 0)

Comparing performance of: delete vs undefined vs null

Created: 5 years ago by: Guest

Jump to the latest result

delete

undefined

null

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):