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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)
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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
gemma2:9b
, generated one year ago):
This benchmark tests the performance difference between accessing a property using the `in` operator versus direct property access in JavaScript. **Options Compared:** * **`in` Operator (`'pointerOnMoveCallback' in props;`)**: This checks if a specific property name exists within an object. It returns `true` if the property is found, `false` otherwise. * **Direct Property Access (`props.pointerOnMoveCallback`)**: This directly retrieves the value associated with the specified property name from the object. **Pros and Cons:** * **`in` Operator:** * **Pro:** Can be useful for checking if a property exists before attempting to access it, preventing potential errors. * **Con:** Generally slower than direct property access as it involves additional checks within JavaScript's internal mechanisms. * **Direct Property Access:** * **Pro:** More efficient and faster as it directly targets the desired property without extra lookups. * **Con:** Can throw an error if the property doesn't exist, requiring error handling. **Other Considerations:** In most cases, direct property access is preferred for its performance benefits unless you specifically need to check for the existence of a property before accessing it. The `in` operator might be more appropriate when iterating through object properties and only needing to process those that exist. Let me know if you have any other benchmarks you'd like analyzed!
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