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str.match vs str.Split1
(version: 0)
Test String.match with regex against String.split with string. We are splitting a string at the spaces.
Comparing performance of:
String.split1 vs Regex.match1
Created:
3 years ago
by:
Guest
Jump to the latest result
Script Preparation code:
string = "This is a benchmark to test if matching a regex is faster that splitting a string"; regex = /\S+/gi;
Tests:
String.split1
string.split(" ").filter(Boolean)
Regex.match1
string.match(/[^,]+/g)
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
String.split1
Regex.match1
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's dive into the world of JavaScript microbenchmarks on MeasureThat.net. **Benchmark Definition** The benchmark measures the performance difference between using `String.match()` with a regular expression (regex) and `String.split()` with a string separator. The goal is to determine which method is faster for splitting a string at spaces. **Options Compared** Two approaches are compared: 1. **`string.split(" ")`**: This method splits the input string into an array of substrings using a space character as the delimiter. 2. **`string.match(/\S+/gi)`**: This method searches for one or more non-space characters (`\S+`) in the string, matching from the beginning (`^`) to the end (`$`) of the string, and ignoring case (`i`). The `g` flag at the end makes it match all occurrences, not just the first one. **Pros and Cons** * **`string.split(" ")`**: + Pros: Simple, intuitive, and widely supported. + Cons: May be slower than regex-based approaches for large strings or complex patterns. * **`string.match(/\S+/gi)`**: + Pros: Can handle regular expressions with variables, quantifiers, and flags, making it flexible and powerful. + Cons: May be slower due to the overhead of compiling and executing the regex pattern. **Library** The `String.prototype.match()` method uses JavaScript's built-in String API to execute the regex pattern. The library is the JavaScript Core Library, which provides the fundamental functionality for working with strings in JavaScript. **Special JS Feature/Syntax** No special features or syntax are used in this benchmark that would require a deep understanding of JavaScript beyond basic concepts. **Other Considerations** When choosing between `String.match()` and `String.split()`, consider the following: * If you need to split a string at multiple delimiters (e.g., commas, spaces), use `string.split()`. * If you need to extract data from a string using a regex pattern, use `string.match()`. * If you're working with large datasets or performance-critical code, consider using optimized libraries like `regex- escape()`. **Alternatives** Other alternatives for splitting strings in JavaScript include: 1. **`String.prototype.replace()`**: Can be used to split a string by replacing a substring with an empty string. 2. **`Array.prototype.map()`**: Can be used to process each element of an array (split string) and create a new array with the desired output. 3. **`lodash.string.split()`**: A popular utility library that provides a robust `split()` method for working with strings. These alternatives may offer better performance, flexibility, or convenience in specific situations, but they require additional setup and may have trade-offs in terms of complexity or overhead.
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str.match vs str.Split in regex
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