Benchmark: JavaScript: Normal assignation VS Object.assign

Tests:

Using normal assignation
const canvas = {width: 300, height: 150}; canvas.width = 1920; canvas.height = 1080;
Using Object.assign
const canvas = {width: 300, height: 150}; Object.assign(canvas, {width: 1920, height: 1080});

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Using normal assignation
Using Object.assign

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (Linux; Android 11; Mi A3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/106.0.0.0 Mobile Safari/537.36

Browser/OS: Chrome Mobile 106 on Android

View result in a separate tab

Test name	Executions per second
Using normal assignation	371074336.0 Ops/sec
Using Object.assign	1332101.5 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's dive into the world of JavaScript benchmarks.

**What is being tested?**

The benchmark is comparing two ways to assign values to an object in JavaScript: using normal assignment (`const canvas = {width: 300, height: 150}; canvas.width = 1920; canvas.height = 1080;`) and using the `Object.assign()` method (`const canvas = {width: 300, height: 150}; Object.assign(canvas, {width: 1920, height: 1080});`).

**Options compared**

Two options are being compared:

1. **Normal assignment**: Assigning properties to an object using dot notation (e.g., `canvas.width = 1920; canvas.height = 1080;`).
2. **Object.assign() method**: Using the `Object.assign()` method to assign values to an object.

**Pros and Cons**

**Normal assignment:**

Pros:

* Simple and intuitive syntax
* Fast, as it only involves accessing and modifying existing properties

Cons:

* Can lead to unexpected behavior if not used carefully (e.g., overwriting existing properties)
* May not be optimized for performance in some situations

**Object.assign() method:**

Pros:

* Explicitly assigns values to an object, making the code more readable and maintainable
* Allows for specifying a target object and source object (useful when working with complex data structures)

Cons:

* Can lead to slower performance due to the overhead of function call and method invocation
* May require additional setup or configuration (e.g., `Object.assign()` is not available in older browsers)

**Other considerations**

The benchmark does not account for other factors that might affect performance, such as:

* JavaScript engine optimizations and caching
* Garbage collection frequency and impact on performance
* Object size and complexity

**Library usage**

There is no library explicitly mentioned in the benchmark. However, it's worth noting that some browsers have built-in optimization for certain types of assignments (e.g., some engines might optimize `Object.assign()` calls).

**Special JS features or syntax**

None are explicitly mentioned in this benchmark.

**Other alternatives**

If you were to write a similar benchmark, you could consider adding more options, such as:

* Using the `Array.prototype.map()` method to assign values
* Using a library like Lodash (which provides the `assignIn()` function)
* Comparing performance with and without caching or memoization

Keep in mind that the choice of assignment method ultimately depends on your specific use case and requirements. Normal assignment might be sufficient for most simple cases, while Object.assign() or other methods might be more suitable for complex data structures or performance-critical code.

Feel free to ask if you have any further questions!

Related benchmarks:

JavaScript: Normal assignation VS Object.assign (version: 0)

Comparing performance of: Using normal assignation vs Using Object.assign

Created: 2 years ago by: Registered User

Jump to the latest result

Using normal assignation

Using Object.assign

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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