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Merge classes
(version: 0)
Comparing performance of:
Proxy vs Func vs Array vs String
Created:
2 years ago
by:
Guest
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Script Preparation code:
styles = { foo: 'bar' }; theme = { foo: 'bar' }; proxy = new Proxy({}, { get: (_, key) => [styles[key], theme?.[key]].join(' ') }); func = (key) => [styles[key], theme?.[key]].join(' ');
Tests:
Proxy
proxy.foo
Func
func('foo')
Array
[styles.foo, theme?.foo].join(' ')
String
`${styles.foo} ${theme?.foo ?? ''}`
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (4)
Previous results
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Test case name
Result
Proxy
Func
Array
String
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the provided JSON benchmark and explain what is being tested. **Benchmark Definition** The benchmark measures the performance of three different approaches to merge classes in JavaScript: 1. `proxy.foo` 2. `func('foo')` 3. `[styles.foo, theme?.foo].join(' ')` 4. ``${styles.foo} ${theme?.foo ?? ''}`` These expressions are being tested to determine which one is the fastest. **Options Compared** The benchmark is comparing four different approaches: 1. **Proxy**: Using a Proxy object to access properties on another object. 2. **Func**: Defining a custom function `func` that concatenates property values from two objects. 3. **Array**: Using an array expression to concatenate property values from two objects. 4. **String Template Literals**: Using string template literals with conditional expressions (`??`) to concatenate property values. **Pros and Cons of Each Approach** 1. **Proxy**: This approach is concise and easy to read, but it requires creating a Proxy object, which may have overhead due to the additional object creation. 2. **Func**: This approach is flexible and can be easily modified or extended, but it requires defining a custom function, which may add complexity. 3. **Array**: This approach is simple and efficient, as arrays are optimized for concatenation operations, but it may not be the most readable solution. 4. **String Template Literals**: This approach is concise and expressive, but it requires support for template literals with conditional expressions (`??`), which may not be available in older browsers. **Library** The `Proxy` object is a built-in JavaScript library that allows creating proxy objects, which can intercept and manipulate property access on an underlying object. The `theme` object is used as the target of the Proxy, and the `styles` object provides the values to be accessed. **Special JS Feature or Syntax** The benchmark uses string template literals (``${...}``) with conditional expressions (`??`), which are a relatively new feature in JavaScript (introduced in ECMAScript 2015). This syntax allows for concise and expressive string concatenation, but may not be supported by older browsers.
Related benchmarks:
Access to Proxy chain
Merge class styles
proxy proto 2
Proxy target[key] vs Proxy Reflect.get vs object access
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