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array.some vs regex.test
(version: 0)
Comparing performance of:
array.some vs regex.test
Created:
2 years ago
by:
Guest
Go to the latest result
Script Preparation code:
var appState = "active"; var regex = /inactive|background/; var arr = ['inactive', 'background'];
Tests:
array.some
array.some(v => v === appState)
regex.test
regex.test(appState);
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
array.some
regex.test
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
one year ago
)
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.0 Safari/537.36
Browser/OS:
Chrome 134 on Mac OS X 10.15.7
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=600276" width="100%" height="500px"></iframe>
regex.test
74.0M/s
array.some
0/s
View exact numbers
Test name
Executions per second
✓
regex.test
74,049,664 Ops/sec
array.some
0 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's dive into the world of JavaScript microbenchmarks on MeasureThat.net. **What is being tested?** The provided benchmark tests two different approaches to check if an element exists in an array: 1. `array.some(v => v === appState)`: This uses the `some` method, which returns `true` as soon as it finds at least one element in the array that satisfies the condition. 2. `regex.test(appState)`: This uses a regular expression to test if `appState` matches any part of the regex pattern. **Options being compared** The benchmark compares the performance of these two approaches: * `array.some` * `regex.test` **Pros and Cons:** 1. **array.some** * Pros: + More efficient, as it stops iterating as soon as it finds a match. + Can be more readable, as the condition is self-explanatory. * Cons: + May not perform well for very large arrays, as it has to iterate through each element. 2. **regex.test** * Pros: + Can be used to test for multiple patterns at once, making it useful for more complex scenarios. * Cons: + Generally slower than `array.some`, especially for simple cases. + May have performance implications if the regex pattern is complex. **Library usage** Neither of the tested libraries is explicitly mentioned. However, in the context of JavaScript and regular expressions, it's likely that these tests are using built-in functions rather than external libraries. **Special JS features or syntax** There are no special JS features or syntax used in this benchmark. **Other alternatives** If you're looking for alternative approaches to check if an element exists in an array: * **Array.prototype.includes()**: This is a modern JavaScript method that returns `true` if the specified value is found in the array. It's often considered more readable and efficient than `some`. * **Array.prototype.findIndex()**: This method returns the index of the first element that satisfies the condition, or -1 if no such element exists. Note that these alternatives might have slightly different performance characteristics depending on the specific use case and browser/JavaScript environment. The benchmark's results can be interpreted as follows: * The `regex.test` approach takes advantage of Chrome's optimized regex engine to execute faster. * The `array.some` approach performs similarly well, despite being slower than `regex.test` for this specific test case. Keep in mind that the actual performance differences may vary depending on the specific input data and JavaScript environment.
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