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str.match vs str.Split first result
(version: 0)
Test String.match with regex against String.split with string. We are splitting a string at the spaces.
Comparing performance of:
String.split vs Regex.match
Created:
5 years ago
by:
Registered User
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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.split
string.split(" ")[1]
Regex.match
string.match(regex)[1]
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
String.split
Regex.match
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
**What is tested in the provided JSON?** The benchmark tests two different approaches to extract a value from a string: 1. **String.split**: The test uses the `split()` method of JavaScript strings, which splits the input string into an array of substrings based on a specified separator (in this case, a space). 2. **Regex.match**: The test uses regular expressions (regex) with the `match()` method to find the first match in the input string. **Options compared** The two approaches are compared in terms of their performance: * String.split: This approach involves iterating through the array of substrings returned by the split() method and extracting the desired value. * Regex.match: This approach uses a single regex operation to extract the desired value directly from the input string. **Pros and Cons of each approach** **String.split:** Pros: * Easy to understand and implement * Works well for simple cases where the separator is a fixed value (e.g., splitting on whitespace) Cons: * Can be slower than Regex.match for large inputs or complex cases * Requires iteration through an array, which can lead to performance issues **Regex.match:** Pros: * Can extract values from strings more efficiently than split() for complex cases * Works well with regular expressions that can handle multiple patterns and replacements Cons: * Requires a good understanding of regex syntax and patterns * Can be slower than split() for very large or simple inputs **Other considerations** In this benchmark, the test case using Regex.match is comparing the first match (i.e., `[1]`) in the array returned by String.split. This simplifies the comparison to focus on the efficiency of extracting a single value from the input string. **Library and its purpose** There is no explicit library mentioned in the benchmark definition or individual test cases. However, JavaScript's built-in `String` object and regex syntax are used throughout the test. **Special JS feature or syntax** None are explicitly mentioned or used in this benchmark. The focus is on comparing two approaches to extract a value from a string. **Alternatives** Other alternatives for extracting values from strings include: * Using String.prototype.indexOf() with a callback function * Using a library like Lodash (e.g., _.head()) that provides efficient methods for working with arrays and strings * Using regular expressions with the RegExp.prototype.exec() method to extract matches from an input string However, the benchmark currently only compares two approaches: String.split and Regex.match.
Related benchmarks:
str.match vs str.Split
str.match vs str.Split(regex)
str.match vs str.Split33
str.match vs str.Split in regex
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