Benchmark: Assignment of value vs Destructuring an object

Tests:

Assign
const obj = {a: { e: { i: 6 } } }; const i = obj.a.e.i; console.log(i);
Destructure
const obj = {a: { e: { i: 6 } } }; const { i } = obj.a.e; console.log(i);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Assign
Destructure

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 6 days ago)

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.0 Safari/537.36

Browser/OS: Chrome 135 on Linux

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Test name	Executions per second
Assign	466907.8 Ops/sec
Destructure	458276.8 Ops/sec

Autogenerated LLM Summary (model llama3.2:3b, generated 6 months ago):

LLMs can make mistakes. Check important info.

I'll break down the provided benchmark definition and explain what's being tested, the options compared, pros and cons of each approach, library usage, special JavaScript features or syntax, and alternative approaches.

**Benchmark Definition**

The benchmark is designed to compare the performance of two approaches: assigning a value to a variable versus destructuring an object in JavaScript. The benchmark measures how many executions per second are possible for each approach.

**Options Compared**

There are only two options compared:

1. **Assignment**: This approach involves assigning the value `6` to a variable, e.g., `const i = obj.a.e.i;`.
2. **Destructuring**: This approach involves using destructuring syntax to extract the value `6` from an object, e.g., `const { i } = obj.a.e;`.

**Pros and Cons of Each Approach**

1. **Assignment**:
	* Pros: Easy to read and understand, no additional syntax needed.
	* Cons: May involve more memory allocations or copies, as a new variable needs to be created to store the value.
2. **Destructuring**:
	* Pros: Can be faster, as it avoids creating an intermediate variable and may reduce memory allocations.
	* Cons: Requires understanding of destructuring syntax and can make code less readable for those unfamiliar with it.

**Library Usage**

There are no libraries used in this benchmark. The JavaScript code is self-contained.

**Special JavaScript Features or Syntax**

The benchmark uses the **Destructuring syntax**, which was introduced in ECMAScript 2015 (ES6). This syntax allows extracting values from objects into separate variables, making it more concise and expressive.

**Alternative Approaches**

Other approaches to compare assignments could include:

1. Using a different variable name or data type.
2. Adding additional operations before or after the assignment/destruction.
3. Comparing performance with other programming languages or frameworks (e.g., using C++ or Python).

However, for JavaScript specifically, the destructuring approach is likely to be the most relevant alternative.

In summary, this benchmark compares two common approaches in JavaScript: assigning a value to a variable versus using destructuring syntax to extract values from objects. The results can help developers optimize their code and understand the performance implications of each approach.

Related benchmarks:

Assignment of value vs Destructuring an object (version: 0)

Comparing performance of: Assign vs Destructure

Created: 6 years ago by: Guest

Jump to the latest result

Assign

Destructure

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 6 months ago):