Benchmark: Battle of the Props - 2

Tests:

Prop lookup
const o = {name: 'Jerry', age: 10}; const name = o.name; const age = o.age; console.log(`{name} is {age} years old`);
Prop destructure
const o = {name: 'Jerry', age: 10}; const {name, age} = o; console.log(`{name} is {age} years old`);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Prop lookup
Prop destructure

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/116.0.0.0 Safari/537.36 Edg/116.0.1938.76

Browser/OS: Chrome 116 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
Prop lookup	436851.9 Ops/sec
Prop destructure	434776.0 Ops/sec

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

LLMs can make mistakes. Check important info.

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

**What is being tested?**

The provided benchmark definition and individual test cases measure the performance differences between two approaches to access properties in an object: "Prop lookup" (using dot notation) and "Prop destructure" (using destructuring assignment).

In both cases, a simple object `o` is created with `name` and `age` properties. The first test case uses traditional dot notation to access these properties and logs the values to the console. The second test case uses destructuring assignment to extract the `name` and `age` properties from the `o` object and then logs their values.

**Options compared:**

1. **Prop lookup (dot notation)**:
	* This approach involves directly accessing the properties of an object using a dot notation, e.g., `o.name`.
	* Pros:
		+ Wide support across browsers and JavaScript engines.
		+ Easy to read and write.
	* Cons:
		+ May involve more overhead due to string lookup and property access in the browser's internal data structures.
2. **Prop destructure (destructuring assignment)**:
	* This approach involves using destructuring assignment to extract multiple properties from an object, e.g., `{name, age} = o;`.
	* Pros:
		+ Often faster than dot notation due to optimized parsing and property access in modern JavaScript engines.
		+ Can improve code readability by reducing the number of variable declarations.

**Other considerations:**

1. **Object size**: The performance difference between these approaches may vary depending on the object size. For small objects, the impact is likely minimal. However, for larger objects, prop destructure might offer a performance boost.
2. **Browser and JavaScript engine variations**: Different browsers and JavaScript engines might optimize or implement these features differently, affecting their relative performance.
3. **Modernization and legacy support**: The newer approach (prop destructure) might be more desirable in modern development projects, but its adoption can impact compatibility with older JavaScript environments.

**Library and special JS feature:**

There is no specific library used in this benchmark. However, it's essential to note that the `const` keyword and template literals (`\r\n`) are part of ECMAScript standards (ECMAScript 2015).

Related benchmarks:

Battle of the Props - 2 (version: 0)

Comparing performance of: Prop lookup vs Prop destructure

Created: one year ago by: Guest

Jump to the latest result

Prop lookup

Prop destructure

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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