Benchmark: delete vs deconstruct

Script Preparation code:

var obj = {
  foo: 1,
  bar: 2,
}

Tests:

delete
if (obj.foo) delete obj.foo;
deconstruct
const {foo, ...rest} = obj;

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
delete
deconstruct

Fastest: N/A

Slowest: N/A

Latest run results:

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

LLMs can make mistakes. Check important info.

Let's dive into the world of JavaScript microbenchmarks on MeasureThat.net.

**What is tested:**

The provided benchmark tests two different approaches for deleting properties from an object in JavaScript:

1. **`delete` operator**: This approach uses the `delete` keyword to remove a property from an object.
2. **Deconstruction using destructuring assignment (ES6 syntax)**: This approach uses the syntax `{ foo, ...rest } = obj;` to extract values from an object and then ignore certain properties.

**Options compared:**

The benchmark compares two options:

1. `delete`
2. Deconstruction using destructuring assignment

**Pros and Cons of each approach:**

* **`delete` operator:**
	+ Pros:
		- Simple and straightforward syntax.
		- Works in older browsers that don't support ES6 syntax.
	+ Cons:
		- Can be slower due to the overhead of the `delete` keyword.
		- May not work correctly in certain edge cases (e.g., deleting a property with an undefined value).
* **Deconstruction using destructuring assignment:**
	+ Pros:
		- More concise and expressive syntax.
		- Often faster than the `delete` operator due to reduced overhead.
	+ Cons:
		- Requires ES6 syntax support, which may not be available in older browsers.

**Library usage:**

In the provided benchmark definition, there is no explicit library usage. However, if a test case uses a library, it's likely that the library is being used to create or manipulate objects, and the focus of the benchmark is on the performance difference between `delete` and deconstruction.

**Special JS feature or syntax:**

The benchmark uses ES6 syntax for destructuring assignment (`const {foo, ...rest} = obj;`). This syntax requires support for ES6 modules and object destructuring in the target browser. The test case assumes that the browser supports this syntax and ignores any potential compatibility issues.

**Other alternatives:**

If you wanted to explore alternative approaches for deleting properties from an object, some other options might include:

1. **`Object.defineProperty()` with `deleteProperty()`**: This approach uses the `defineProperty()` method to set a property's descriptor, then uses the `deleteProperty()` method to delete the property.
2. **Using a library like Lodash or Underscore.js**: These libraries provide utility functions for working with objects and arrays, including deleting properties.

Keep in mind that each of these alternatives has its own trade-offs and potential performance implications. The benchmark on MeasureThat.net is focused specifically on comparing the `delete` operator and deconstruction using destructuring assignment.

Related benchmarks:

delete vs deconstruct (version: 0)

Comparing performance of: delete vs deconstruct

Created: 6 years ago by: Guest

Jump to the latest result

delete

deconstruct

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):