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String includes space (regex vs String.includes)
(version: 0)
Comparing performance of:
RegEx.test vs String.includes vs String.match
Created:
2 years ago
by:
Guest
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Script Preparation code:
var string = 'https://www.google.com?query=' + new Array(2083).fill('a'); var regex = /\s/;
Tests:
RegEx.test
regex.test(string);
String.includes
string.includes(" ");
String.match
string.match(" ");
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (3)
Previous results
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Test case name
Result
RegEx.test
String.includes
String.match
Fastest:
N/A
Slowest:
N/A
Latest run results:
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
**Overview of the Benchmark** The provided JSON represents a JavaScript microbenchmark on `String includes space (regex vs String.includes)`. The benchmark compares the performance of two approaches: using regular expressions (`RegExp.test`) and the built-in `String.includes` method. **Comparison of Options** The two options being compared are: 1. **Regular Expressions (RegEx)**: Using the `RegExp.test()` method to search for a space character (`\\s`) in the string. 2. **Built-in String Includes Method**: Using the `String.includes()` method to check if a space character is present in the string. **Pros and Cons of Each Approach** **Regular Expressions (RegEx)** Pros: * Highly flexible and powerful pattern matching capabilities * Can be used for more complex text processing tasks beyond just checking for specific characters Cons: * Performance overhead due to the complexity of the regular expression engine * May be slower than the built-in `String.includes` method for simple character checks **Built-in String Includes Method** Pros: * Fast and efficient, optimized for simple character checks * Simple to use and understand for basic text processing tasks Cons: * Limited flexibility compared to regular expressions * May not support more complex pattern matching requirements **Library: RegExp (JavaScript)** The `RegExp` library is used in the benchmark to implement the regular expression engine. The `RegExp.test()` method takes a string and a regular expression pattern as arguments, and returns a boolean indicating whether the pattern was found at the beginning of the string. **Special JS Feature/Syntax** None mentioned in this specific benchmark. **Other Alternatives** If you needed to check for space characters in a string without using regular expressions or the built-in `String.includes` method, other alternatives might include: * Using the `indexOf()` method with a specific character code (e.g., `string.indexOf(' ')`) * Using a library like `needle` or `js-chars` for efficient substring searching * Implementing a custom text processing algorithm using bitwise operations and loop manipulation Keep in mind that these alternatives may not be as efficient or straightforward to use as the built-in `String.includes` method, which is optimized for this specific task.
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String includes space (regex vs String.includes) 2
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