Benchmark: createComment vs cloneNode

Script Preparation code:

var MAX_ITERATIONS = 100000;

Tests:

createComment
const list = []; for(let i = 0; i < MAX_ITERATIONS; i++) { list.push(document.createComment('this is a comment')); }
cloneNode
const src = document.createComment('this is a comment'); const list = []; for(let i = 0; i < MAX_ITERATIONS; i++) { list.push(src.cloneNode()); }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
createComment
cloneNode

Fastest: N/A

Slowest: N/A

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 MeasureThat.net and analyze the provided benchmark.

**What is being tested?**

The benchmark measures the performance difference between two approaches to create new DOM comments: `document.createComment()` and `cloneNode()`. Specifically, it tests how fast each approach can add a large number (100,000) of identical comments to a list.

**Options compared**

There are two main options being compared:

1. **`document.createComment()`**: This method creates a new DOM comment element directly from the document object.
2. **`cloneNode()`**: This method creates a copy of an existing node in the document tree, but can be used to create a new comment by cloning the `Document COMMENT_NODE` node.

**Pros and Cons of each approach**

1. **`document.createComment()`**:
	* Pros: Creates a new DOM comment element directly from the document object, which might be more efficient since it doesn't require cloning an existing node.
	* Cons: Requires creating multiple objects in memory, which can lead to higher memory usage and potentially slower performance for large numbers of comments.
2. **`cloneNode()`**:
	* Pros: Creates a copy of an existing node (in this case, the `Document.COMMENT_NODE` node), which is likely to be more efficient since it only creates one object in memory per comment.
	* Cons: Requires cloning an existing node, which can lead to slower performance compared to creating a new object directly.

**Other considerations**

The benchmark also considers the use of JavaScript features and syntax, but in this case, none are apparent. The test code uses standard JavaScript syntax and does not include any advanced or experimental features.

**Library usage**

There is no explicit mention of any libraries being used in the benchmark. However, it's worth noting that `Document.COMMENT_NODE` is a constant defined on the global `Document` object, which suggests that the benchmark may be using a specific implementation of the DOM API.

**Special JS feature or syntax**

None are mentioned in this specific benchmark.

Latest run results:

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

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.75 Safari/537.36

Browser/OS: Chrome 100 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
createComment	17.4 Ops/sec
cloneNode	20.8 Ops/sec

Related benchmarks:

createComment vs cloneNode (version: 0)

Faster way to create new dom comments before insertion

Comparing performance of: createComment vs cloneNode

Created: 2 years ago by: Guest

Jump to the latest result

createComment

cloneNode

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):