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Reflect vs Property
(version: 0)
Comparing performance of:
Reflect vs Property
Created:
5 years ago
by:
Guest
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Script Preparation code:
window.top.tests = {reflect:[], property:[]}; window.test = (new Array(1000)).fill({a: 5});
Tests:
Reflect
window.top.tests.reflect = window.test.map(obj => Reflect.get(obj, 'a'));
Property
window.top.tests.property = window.test.map(obj => obj['a']);
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
Reflect
Property
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 definition and test cases. **What is being tested?** The benchmark measures the performance of two approaches to access the value of property `'a'` on an object: 1. `Reflect.get()`: This method uses the Reflect API, which provides a way to dynamically inspect and modify objects. 2. Property access using dot notation (`obj['a']`): This is the traditional way to access properties on an object. **Options being compared** The two options being compared are: * `Reflect.get(obj, 'a')`: This method uses the Reflect API to get the value of property `'a'`. * `obj['a']`: This is the traditional way to access a property using dot notation. **Pros and Cons** **Reflect.get()** Pros: * Can handle complex property names and symbols * Can be used with objects that don't have a property with the given name (e.g., using `Reflect.has()` to check if the property exists) * May provide better performance for accessing properties on objects with many nested properties Cons: * Can be slower due to the overhead of using the Reflect API * May not be supported in older browsers or environments **Property access using dot notation** Pros: * Fast and lightweight * Widely supported across most browsers and environments * Easy to read and write Cons: * Limited to accessing simple property names (no support for complex names or symbols) * Will throw an error if the property does not exist on the object **Library used** The `Reflect` API is part of the JavaScript Standard Library, which provides a set of built-in functions and objects that can be used to dynamically inspect and modify objects. **Special JS feature or syntax** There are no special JS features or syntaxes being tested in this benchmark. The focus is on comparing two different approaches to accessing properties on an object. **Other alternatives** If the goal was to measure the performance of accessing other types of values (e.g., methods, functions), other alternatives could be explored, such as: * Using a closure or bind() function to access the method directly * Using a proxy object with `get()` trap to dynamically return the value of the method However, in this specific benchmark, property access using dot notation is the only alternative being tested. I hope this explanation helps! Let me know if you have any further questions.
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