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Hydra Test
(version: 0)
Hydra Test
Comparing performance of:
Get By Attr vs Get By Cache
Created:
5 years ago
by:
Registered User
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HTML Preparation code:
<svg id="target" class="target"></svg>
Script Preparation code:
var target = document.getElementsByTagName('svg'); var cache = [{ id: 'target', class: 'target' }]
Tests:
Get By Attr
var i = 1000; while (i--) { target[0].getAttribute('id') target[0].getAttribute('class') }
Get By Cache
var i = 1000; while (i--) { cache[0].id cache[0].class }
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
Get By Attr
Get By Cache
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 dive into the world of JavaScript microbenchmarks on MeasureThat.net. The provided JSON represents two benchmark test cases, each with its own script preparation code and HTML preparation code. **Benchmark 1: "Hydra Test"** The script preparation code is: ```javascript var target = document.getElementsByTagName('svg'); var cache = [{ id: 'target', class: 'target' }]; ``` This code creates a variable `target` that holds an array of all `<svg>` elements on the page. It then defines a `cache` object with two properties: `id` and `class`. The purpose of this script is likely to set up some kind of benchmarking framework or data structure. The HTML preparation code is: ```html <svg id="target" class="target"></svg> ``` This simple HTML snippet creates an `<svg>` element on the page, which will be used as a test subject in the benchmark. **Benchmark 2: "Get By Attr"** The script preparation code is: ```javascript var i = 1000; while (i--) { target[0].getAttribute('id'); target[0].getAttribute('class'); } ``` This loop iterates 1,000 times and retrieves the `id` and `class` attributes of the first `<svg>` element in the `target` array. The purpose of this benchmark is to measure the performance of getting attribute values from an array. **Benchmark 2: "Get By Cache"** The script preparation code is: ```javascript var i = 1000; while (i--) { cache[0].id; cache[0].class; } ``` This loop iterates 1,000 times and retrieves the `id` and `class` properties of the first element in the `cache` array. The purpose of this benchmark is to measure the performance of getting property values from an object. **Comparison of options** The two benchmarks compare the performance of retrieving attribute values versus property values. * **Get By Attr**: Retrieves attributes using the `getAttribute()` method, which may be slower due to additional overhead and parsing. * **Get By Cache**: Retrieves properties directly from the object using dot notation (e.g., `cache[0].id`), which is likely faster since it avoids the extra step of looking up the attribute in a DOM element. **Pros and cons** * **Get By Attr**: + Pros: May be more flexible or forgiving when dealing with non-standard attributes. + Cons: Likely slower due to additional overhead and parsing. * **Get By Cache**: + Pros: Faster since it avoids extra steps and overhead. + Cons: May only work correctly if the object is properly initialized and accessed. **Library usage** The `cache` variable uses a JavaScript object literal ( `{}` ) to define an object with two properties. This is a basic example of using objects in JavaScript. **Special JS features or syntax** There are no special JS features or syntax used in these benchmarks beyond what's mentioned above. **Other alternatives** If you wanted to modify or replace one of the benchmarks, you could try: * Using a different method for retrieving attribute values (e.g., `Element.getAttribute` with parentheses). * Using a different data structure (e.g., an array instead of an object) for the cache. * Adding additional logic or complexity to the benchmark script. Keep in mind that any changes would likely affect the performance results and should be thoroughly tested.
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