Benchmark: Assignment of multiple values vs destructuring an object

Tests:

Assign
const obj = {a: { e: { i: 6, j: 'A', k: 10.2 } } }; const i = obj.a.e.i; const j = obj.a.e.j; const k = obj.a.e.k; console.log(i, j, k);
Destructure
const obj = {a: { e: { i: 6, j: 'A', k: 10.2 } } }; const { i, j, k } = obj.a.e; console.log(i, j, k);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Assign
Destructure

Fastest: N/A

Slowest: N/A

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

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**Benchmark Definition**

The benchmark measures the performance difference between two approaches for assigning values from an object: traditional assignment and destructuring using object literal syntax (ECMAScript 2015+).

**Options Compared**

1. **Traditional Assignment**: This approach uses multiple lines to assign each property value individually, e.g., `const i = obj.a.e.i; const j = obj.a.e.j; const k = obj.a.e.k;`.
	* Pros: Easy to understand and implement for older JavaScript versions.
	* Cons: Can be slower due to the overhead of creating temporary variables and assigning values to them.
2. **Destructuring using Object Literal Syntax**: This approach uses object literal syntax to assign multiple properties from an object in a single line, e.g., `const { i, j, k } = obj.a.e;`.
	* Pros: More concise and readable, potentially faster due to reduced overhead.
	* Cons: May not be compatible with older JavaScript versions (before ECMAScript 2015+).
3. **Destructuring using Array Syntax**: This approach uses array syntax to assign multiple properties from an object in a single line, e.g., `const [i, j, k] = obj.a.e;`.
	* Pros: Similar to object literal syntax but potentially more flexible and readable.
	* Cons: Not supported by older JavaScript versions (before ECMAScript 2015+).

**Library and Purpose**

None of the test cases use any external libraries. The `Array.from()` method is not used in either test case, which means that Array.prototype methods are available.

**Special JS Feature or Syntax**

The benchmark uses ECMAScript 2015+ syntax (specifically, object literal syntax) for destructuring. This syntax was introduced in ECMAScript 2015 and allows developers to destructure objects into separate variables in a single line. While this syntax is not supported by older JavaScript versions, it has become increasingly popular due to its concise and readable nature.

**Other Alternatives**

Alternative approaches for assigning values from an object include:

* Using `Object.assign()` or the spread operator (`...`) to merge multiple properties into a new object.
* Using a loop or a map function to iterate over the properties of an object.
* Using a different data structure, such as an array of objects, if the assignment is not a simple property-value pair.

These alternatives may offer performance benefits in certain scenarios, but they also introduce additional complexity and potentially impact code readability.

Related benchmarks:

Assignment of multiple values vs destructuring an object (version: 0)

Comparing performance of: Assign vs Destructure

Created: 3 years ago by: Guest

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Assign

Destructure

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):