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=== vs includes
(version: 0)
how much of a performance deficit you can expect from using Array.includes instead of strict equal
Comparing performance of:
Array.includes vs Or chain
Created:
2 years ago
by:
Guest
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Script Preparation code:
var stringToMatch = 'hello';
Tests:
Array.includes
[ 'hello'].includes(stringToMatch)
Or chain
stringToMatch === 'hello'
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
Array.includes
Or chain
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. **Benchmark Definition Explanation** The benchmark is designed to measure the performance difference between two approaches: 1. Using `Array.includes()` to check if an element exists in an array. 2. Using a strict equality check (`===`) to compare a value with a string literal. In essence, this benchmark tests how much slower or faster each approach is compared to the other. **Options Compared** The two options being compared are: * **Or chain (Array.includes())**: This method uses the `includes()` method on an array to check if a specific element exists within it. * **Strict equality check (`===`)**: This method uses a simple equality comparison between two values, in this case, comparing a string variable with a string literal. **Pros and Cons of Each Approach** 1. **Or chain (Array.includes())**: * Pros: + More readable and maintainable code + Can be more efficient for larger arrays or datasets, as it uses an optimized algorithm under the hood * Cons: + May incur a small overhead due to method call and array lookup 2. **Strict equality check (`===`)**: * Pros: + Fast and lightweight, with minimal overhead * Cons: + Less readable and maintainable code, as it's more prone to typos or mistakes + May be slower for larger arrays or datasets due to the need for a full equality comparison **Library Used** None. This benchmark doesn't use any external libraries. **Special JS Features/Syntax (Optional)** There are no special JavaScript features or syntax mentioned in this benchmark. **Other Considerations** * **Performance**: The benchmark is designed to measure performance, so it's essential to consider factors like cache efficiency, branch prediction, and instruction-level parallelism. * **Real-world scenarios**: It's worth noting that these two approaches might have different implications in real-world scenarios. For example, using `Array.includes()` might be more suitable for searching large datasets or arrays, while a strict equality check (`===`) might be sufficient for simple value comparisons. **Alternative Approaches** In addition to the two options being compared (Or chain and Strict equality check), other approaches could include: * **String interpolation**: Instead of using `Array.includes()`, you could use string interpolation to concatenate strings with the matched element. This approach would likely incur more overhead due to the creation of a new string object. * **Regular expressions**: You could use regular expressions (regex) to search for patterns within the array, which might be faster than `Array.includes()` but more complex and less readable. These alternative approaches are not directly related to the original benchmark definition and would require additional setup and testing.
Related benchmarks:
equality vs includes
chain of or equals vs includes but smaller
String equals vs String.includes
equals vs includes
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