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setAttribute vs data property
(version: 0)
Comparing performance of:
TextNode data vs Div setAttribute
Created:
6 years ago
by:
Guest
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Script Preparation code:
var textNode = document.createTextNode(''); var div = document.createElement('div');
Tests:
TextNode data
for (var c=0;c<1000;c++) { textNode.data = c%2; }
Div setAttribute
for (var c=0;c<1000;c++) { div.setAttribute('tick', c%2); }
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
TextNode data
Div setAttribute
Fastest:
N/A
Slowest:
N/A
Latest run results:
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the provided benchmark and explain what is being tested. **Benchmark Overview** The benchmark is designed to compare the performance of two approaches: 1. Setting a data property on a `Text` node (`TextNode data`) 2. Setting an attribute on an HTML element (`Div setAttribute`) **Comparison Options** The benchmark tests two options for setting properties and attributes: * **TextNode data**: This approach uses the `data` property to store a value, which is then updated in each iteration of the loop. The `data` property is a special property that can be used to store arbitrary data on a `Text` node. * **Div setAttribute**: This approach uses the `setAttribute()` method to set an attribute named "tick" on an HTML element (`div`). The value of this attribute is updated in each iteration of the loop. **Pros and Cons** **TextNode data:** Pros: * More concise code, as no additional attributes need to be declared. * Can potentially lead to better cache locality, as the `data` property is stored directly on the node. Cons: * May not be supported by all browsers or older versions of JavaScript. * Can be slower for very large arrays or objects, as it may require more memory allocations. **Div setAttribute:** Pros: * Widely supported across different browsers and versions of JavaScript. * Can be faster for very large arrays or objects, as it avoids the need for additional memory allocations. Cons: * Requires an extra step to declare the attribute name, which can add overhead to the code. * May lead to worse cache locality due to the additional indirection through the `setAttribute()` method. **Library and Special JS Features** In this benchmark, no libraries are used beyond the standard JavaScript API. No special JavaScript features or syntax are applied. **Alternatives** Other alternatives for setting properties and attributes include: * **Object.assign()**: This method can be used to assign values to properties on an object, including `Text` nodes. * **Element.setAttribute()` with a string value: In this approach, the attribute name would be a string literal, rather than a variable. This may lead to better cache locality due to the fixed length of the attribute names. **Benchmark Preparation Code** The provided preparation code is: ```javascript var textNode = document.createTextNode(''); var div = document.createElement('div'); ``` This creates an empty `Text` node and an empty HTML element (`div`). The `TextNode data` test case uses these elements to store and update values, while the `Div setAttribute` test case uses the same elements but sets attributes instead.
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