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in vs direct call
(version: 0)
Comparing performance of:
in vs direct
Created:
6 years ago
by:
Registered User
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Script Preparation code:
var props = {foo: 'foo', bar: 'bar', baz: 'baz' }
Tests:
in
'pointerOnMoveCallback' in props;
direct
props.pointerOnMoveCallback
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
in
direct
Fastest:
N/A
Slowest:
N/A
Latest run results:
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Autogenerated LLM Summary
(model
llama3.1:latest
, generated one year ago):
Let's break down what's being tested and explained. **What is being tested?** The benchmark tests the performance difference between two ways of accessing a property in JavaScript: using the `in` operator (`'pointerOnMoveCallback' in props`) versus direct access (accessing the property directly, `props.pointerOnMoveCallback`). **Description of options** We have two test cases: 1. **`in`**: Using the `in` operator to check if a property exists in an object. * Pros: Easy to read and write, concise syntax. * Cons: May be slower than direct access for large objects or complex properties. 2. **`direct`**: Directly accessing a property by its name (e.g., `props.pointerOnMoveCallback`). * Pros: Often faster than using the `in` operator, especially for large objects or complex properties. * Cons: May be more verbose and harder to read. **Other considerations** When choosing between these approaches, consider the following: * If you only need to check if a property exists, use the `in` operator. It's concise and easy to understand. * If you need to access a property for its value, direct access is often faster and more efficient. **Library or special JS feature** There is no library mentioned in this benchmark. **Special JS feature or syntax** No special JavaScript features or syntax are used in this benchmark. The `in` operator is a built-in JavaScript operator. **Alternatives** If you're looking for alternatives to these approaches, consider the following: * Using `hasOwnProperty()` method to check if an object has its own property (not inherited from its prototype chain). * Using `Object.prototype.hasOwnProperty.call()` to check if an object has its own property (more flexible than `hasOwnProperty()`). Keep in mind that these alternatives may have different performance characteristics and use cases compared to the original approaches.
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