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id vs setAttribute
(version: 0)
Comparing performance of:
id vs setAttribute
Created:
9 years ago
by:
Guest
Go to the latest result
Script Preparation code:
var ELEMENT = document.createElement('div');
Tests:
id
ELEMENT.id = 'testID';
setAttribute
ELEMENT.setAttribute('id', 'testID');
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
id
setAttribute
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
7 months ago
)
User agent:
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/137.0.0.0 Safari/537.36
Browser/OS:
Chrome 137 on Linux
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<iframe src="https://measurethat.net/Embed?id=622402" width="100%" height="500px"></iframe>
id
4.5M/s
setAttribute
3.4M/s
View exact numbers
Test name
Executions per second
✓
id
4,519,058 Ops/sec
setAttribute
3,439,513 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
I'd be happy to help explain what's being tested in this benchmark. **Benchmark Definition and Test Cases** The provided JSON represents a JavaScript microbenchmark test case, which measures the performance difference between two approaches: assigning an ID to a DOM element using the `id` property versus setting an attribute named "id" on the same element. There are two individual test cases: 1. **"id"`**: This test case assigns the string `'testID'` to the `id` property of the `ELEMENT` variable. 2. **"setAttribute"`**: This test case sets an attribute named "id" with the value `'testID'` on the same `ELEMENT` variable. **Options Compared** The two approaches being compared are: 1. **Direct Property Assignment (`id` property)**: Assigning a value directly to the `id` property of the element. 2. **Attribute-Based Approach (`setAttribute`)**: Setting an attribute named "id" with a specified value on the element using the `setAttribute()` method. **Pros and Cons** **Direct Property Assignment (using `id` property)** Pros: * More concise and readable code * Faster access to the ID value, as it's stored in a property directly on the object * Fewer overheads compared to setting an attribute Cons: * Some older browsers might not support the `id` property or have quirks with its usage **Attribute-Based Approach (using `setAttribute`)** Pros: * More flexible and extensible, as attributes can be used for other purposes beyond just storing IDs * Works in most modern browsers, including those that don't support the `id` property directly on elements * Can be used to store more complex data structures or metadata Cons: * Requires an additional method call (`setAttribute()`), which incurs a slight overhead * The attribute name and value must be explicitly specified, making the code slightly less concise than direct property assignment **Other Considerations** * In modern JavaScript, using `data-*` attributes (e.g., `data-id`) is a common practice for storing custom data on elements. This approach is not directly related to the benchmark but is worth mentioning as an alternative method. * For some use cases, such as accessibility or ARIA support, assigning IDs through `id` properties might be preferred over attribute-based approaches. **Library and Special JS Features** There are no libraries explicitly mentioned in this benchmark, nor any special JavaScript features (e.g., async/await, Promises) that would require additional explanation. The focus is solely on the two core approaches being compared: direct property assignment and attribute-based setting. **Alternatives** Other alternatives for storing or retrieving data from elements include: 1. **Using `data-*` attributes**: As mentioned earlier, this approach can be more flexible and extensible than attribute-based setting. 2. **Setting a custom data attribute on the element**: This can be achieved using the `setAttribute()` method with a specific prefix (e.g., `data-`) followed by the desired key-value pair. If you have any further questions or would like me to elaborate on any of these points, please let me know!
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