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RegEx.exec vs String.match2
(version: 0)
Comparing performance of:
regex.exec vs string.match
Created:
2 years ago
by:
Guest
Jump to the latest result
Script Preparation code:
var string = 'beepope<a href="http://DevNode/Lists/Publications.aspx#/publication/123">sdfsdfsf</a>'; var regex = /<a\s+href=(["'])(.*?)\1[^>]*?>(.*?)<\/a>/;
Tests:
regex.exec
regex.exec(string);
string.match
string.match(regex);
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
regex.exec
string.match
Fastest:
N/A
Slowest:
N/A
Latest run results:
No previous run results
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the provided benchmark and explain what's being tested. **Benchmark Definition** The benchmark compares two ways to test regular expression matching in JavaScript: `String.match2` and `RegExp.exec`. The `Script Preparation Code` defines a sample string with HTML tags that contain links, and a regular expression pattern that matches the `<a>` tags. **Options Compared** Two approaches are being compared: 1. **`String.match2`**: This method is not a standard JavaScript method (although it might be available in some libraries or frameworks). It's likely a custom implementation of `String.match`, which also takes a regular expression pattern as an argument. 2. **`RegExp.exec`**: This is the standard JavaScript method for executing regular expressions. **Pros and Cons** 1. **`String.match2`**: * Pros: Might be more efficient or optimized for specific use cases, especially if it's implemented in native code. * Cons: Not a standard JavaScript method, might not work in all browsers or environments, and its performance might vary depending on the implementation. 2. **`RegExp.exec`**: * Pros: Standardized, widely supported, and well-documented. It's also more flexible than `String.match`, as it allows you to return multiple matches instead of just the first one. * Cons: Might be slower or less efficient for certain use cases, depending on the implementation. **Library: String.match2** Since `String.match2` is not a standard JavaScript method, we can assume it's implemented in a library or framework. Unfortunately, the benchmark doesn't provide information about this library, so we can only speculate that it might be optimized for specific performance characteristics or use cases. **Special JS Feature/Syntax** There are no special JavaScript features or syntaxes being tested in this benchmark. **Benchmark Preparation Code and Test Cases** The `Script Preparation Code` defines a sample string with HTML tags that contain links. The regular expression pattern `/<a\\s+href=([\"'])(.*?)\\1[^>]*?>(.*?)<\/a>/` matches the `<a>` tags, capturing the link URL (`[\"']`) and the text content (`(.*?)`). The two test cases are: 1. `regex.exec(string);` 2. `string.match(regex);` These tests execute the regular expression pattern on the sample string using `RegExp.exec` and `String.match`, respectively. **Latest Benchmark Result** The latest benchmark result shows the execution times for each test case, measured in executions per second (EPS). The results indicate that `String.match` is slightly faster than `RegExp.exec` for this specific use case.
Related benchmarks:
RegEx.exec vs String.match
RegEx.exec vs String.match (inline)
RegEx.test vs. String.includes vs. String.match vs String.match(regex) for starting string
RegExp.exec vs String.match vs RegExp.test vs RegExp.match
RegEx.test vs. String.includes x 2
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