Benchmark: Testing replace vs update of images

HTML Preparation code:

<div class="dice"><img src="https://raw.githubusercontent.com/juneate/dice-game/e600e36cee672b294cea03917617de81fb77fcf3/img/dice3.svg" alt="Rolled 3" class="face"></div>

Tests:

Replacing the img
let diceRoll = 4 // Search for the .dice <div> let theDice = document.querySelector('.dice') // Replace the innerHTML <img> with a new <img> theDice.innerHTML = `<img src="https://raw.githubusercontent.com/juneate/dice-game/e600e36cee672b294cea03917617de81fb77fcf3/img/dice${diceRoll}.svg" alt="Rolled ${diceRoll}" class="face">`
Updating the image attributes
let diceRoll = 4 // Search for the .face <img> let theFace = document.querySelector('.face') // Replace the src attribute with "img/dice4.svg" theFace.setAttribute(`src`, `https://raw.githubusercontent.com/juneate/dice-game/e600e36cee672b294cea03917617de81fb77fcf3/img/dice${diceRoll}.svg`) // Replace the alt attribute with "Rolled 4" theFace.setAttribute(`alt`, `Rolled ${diceRoll}`)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Replacing the img
Updating the image attributes

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 4 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.193 Safari/537.36

Browser/OS: Chrome 86 on Mac OS X 10.15.6

View result in a separate tab

Test name	Executions per second
Replacing the img	20325.9 Ops/sec
Updating the image attributes	26587.1 Ops/sec

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

LLMs can make mistakes. Check important info.

The provided JSON represents a JavaScript microbenchmark on MeasureThat.net, which compares two approaches to update or replace an HTML image element's attributes.

**Options being compared:**

1. **Replacing the innerHTML**: This approach involves replacing the entire `<img>` element with a new one by setting its `innerHTML` property.
2. **Updating individual attributes**: This approach involves updating only specific attributes (e.g., `src` and `alt`) of the existing `<img>` element without replacing it.

**Pros and cons of each approach:**

1. **Replacing innerHTML**:
	* Pros:
		+ Simple and straightforward implementation.
		+ May be faster since the entire HTML structure is updated at once.
	* Cons:
		+ Can lead to unnecessary DOM mutations, potentially affecting performance in complex web pages.
		+ May not work well with dynamic content or JavaScript-heavy web pages.
2. **Updating individual attributes**:
	* Pros:
		+ More efficient and targeted updates, reducing the number of DOM mutations.
		+ Suitable for dynamic content and JavaScript-heavy web pages.
	* Cons:
		+ Requires more complex implementation to update multiple attributes correctly.

**Library used:**

None is explicitly mentioned in the provided JSON. However, it's likely that MeasureThat.net uses a vanilla JavaScript implementation or possibly some library-specific optimizations.

**Special JS feature or syntax:**

The benchmark utilizes `let` declarations, which are part of modern JavaScript (ECMAScript 2015+). It also uses template literals (`<img src="...">`) for HTML string construction, which is a relatively recent addition to the language (introduced in ECMAScript 2015).

**Other alternatives:**

For updating or replacing image attributes, other approaches might include:

1. **QuerySelector and setAttribute**: Using `document.querySelector()` to select the element and then setting specific attributes using `setAttribute()`.
2. **DOM manipulation libraries**: Utilizing libraries like jQuery or DOM Manipulation APIs (e.g., `Element.replaceChild()`) for more efficient updates.
3. **Virtual DOM approaches**: Implementing a Virtual DOM (a lightweight in-memory representation of the actual DOM) to optimize updates, which is commonly used in React-like frameworks.

Keep in mind that these alternatives might not be directly applicable or suitable for every use case, and their performance impact will vary depending on the specific requirements and implementation details.

Related benchmarks:

Testing replace vs update of images (version: 0)

Comparing performance of: Replacing the img vs Updating the image attributes

Created: 4 years ago by: Guest

Jump to the latest result

Replacing the img

Updating the image attributes

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):