Benchmark: Object.assign vs Polyfill

Tests:

Object.assign
Object.assign(document.createElement("div"), { className: "ActionBox" });
Polyfill
var div = document.createElement("div"); var options = {className: "ActionBox"}; for (const key in options) { div[key] = options[key]; }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Object.assign
Polyfill

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.0 Safari/537.36

Browser/OS: Chrome 135 on Windows

View result in a separate tab

Test name	Executions per second
Object.assign	847573.5 Ops/sec
Polyfill	1016172.8 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the benchmark and explain what's being tested.

**What is being tested?**

The provided JSON represents two test cases that compare the performance of `Object.assign()` with a polyfill (a work-around for older browsers) when used to assign properties to an HTML element.

**Options compared:**

1. **`Object.assign()`**: A built-in JavaScript method that assigns properties from one or more source objects to a target object.
2. **Polyfill**: A custom implementation of the `Object.assign()` method, likely for use in older browsers that don't support the original `Object.assign()` method.

**Pros and cons:**

1. **`Object.assign()`**:
	* Pros:
		+ Built-in, widely supported, and optimized by most JavaScript engines.
		+ Typically faster than a custom polyfill.
	* Cons:
		+ May not work in older browsers that don't support the original `Object.assign()` method.
2. **Polyfill**:
	* Pros:
		+ Works in older browsers that don't support the original `Object.assign()` method.
	* Cons:
		+ Typically slower than a built-in implementation like `Object.assign()`.
		+ May require additional overhead for browser checks and polyfill implementation.

**Library usage:**

In this benchmark, no libraries are used. However, it's worth noting that some browsers may have their own implementations of the `Object.assign()` method or similar functionality.

**Special JS feature or syntax:**

None mentioned in the provided information.

**Benchmark preparation code:**

The script preparation code is empty, suggesting that the test relies solely on the browser's built-in behavior for `Object.assign()`. The HTML preparation code is also empty, implying that the focus is on comparing the performance of the two options without additional overhead from the DOM.

**Other alternatives:**

Alternative approaches to testing `Object.assign()` might include:

1. Using a different property assignment method, such as `assign()` (if supported) or a custom implementation.
2. Comparing with other methods for assigning properties to an object, like `forEach()` or `for...in`.
3. Testing the performance of `Object.assign()` in different scenarios, such as:
	* Assigning large amounts of data.
	* Using nested objects.
	* Handling edge cases (e.g., assigning null or undefined values).

Keep in mind that these alternatives would require additional test case definitions and modifications to the benchmark framework.

Related benchmarks:

Object.assign vs Polyfill (version: 0)

Comparing performance of: Object.assign vs Polyfill

Created: 4 years ago by: Guest

Jump to the latest result

Object.assign

Polyfill

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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