Benchmark: reference variable vs dotnotation

Script Preparation code:

window.A = (() => {
	const { assign } = Object;
    return function A(x){assign(this, x);}
})();
window.B = (() => {
	return function B(x){Object.assign(this, x);}
})();

Tests:

A: use reference
A({a: 1})
B: use dot-operator
B({b: 1})

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
A: use reference
B: use dot-operator

Fastest: N/A

Slowest: N/A

Latest run results:

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

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Let's break down what's being tested in the provided JSON.

**Benchmark Definition**

The benchmark is comparing two approaches to assigning properties to an object:

1. **Reference assignment using `A` function**: The `A` function returns a new function that takes an object as an argument and assigns it to the current object using `Object.assign(this, x)`.
2. **Dot notation with `B` function**: The `B` function simply returns a new function that takes an object as an argument and assigns it to the current object using `Object.assign(this, x)`.

**Options being compared**

The two options are:

1. **Reference assignment (using `A` function)**: This approach creates a new function that returns another function, which assigns properties to the current object.
2. **Dot notation (using `B` function)**: This approach creates a new function that directly assigns properties to the current object.

**Pros and cons**

1. **Reference assignment using `A` function**:
	* Pros:
		+ More explicit control over the assignment process
		+ Allows for more flexibility in handling errors or edge cases
	* Cons:
		+ Creates an additional layer of indirection, which can lead to slower performance
2. **Dot notation with `B` function**:
	* Pros:
		+ Simpler and more concise syntax
		+ Less overhead due to the additional layer of indirection
	* Cons:
		+ Less explicit control over the assignment process
		+ May be less flexible in handling errors or edge cases

**Library**

In this benchmark, `Object.assign` is being used as a library. It's a built-in JavaScript function that assigns properties from one object to another.

**Special JS feature**

There doesn't seem to be any special JavaScript features or syntax being used in this benchmark.

**Other alternatives**

If you're looking for alternative approaches to assigning properties to an object, some other options could include:

1. **Using the bracket notation (`obj[key] = value`)**: This approach is similar to dot notation but uses square brackets instead of dots.
2. **Using a loop to iterate over the object's properties**: This approach can be useful if you need to assign multiple values to an object.

However, it's worth noting that these alternatives may not be directly comparable to the `A` and `B` functions in this benchmark, as they have different syntax and semantics.

Related benchmarks:

reference variable vs dotnotation (version: 0)

Comparing performance of: A: use reference vs B: use dot-operator

Created: 4 years ago by: Guest

Jump to the latest result

A: use reference

B: use dot-operator

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):