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regex vs split pop
(version: 0)
Comparing performance of:
regex vs split pop
Created:
3 years ago
by:
Guest
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Tests:
regex
/(\bsvg\b|\bgif\b)(?!\1)$/gi.test('sfdsd.svgf.fdgdfg.-ssdfs23423.gif')
split pop
'sfdsd.svgf.fdgdfg.-ssdfs23423.gif'.split('.').pop()
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Suite status:
<idle, ready to run>
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Test case name
Result
regex
split pop
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N/A
Slowest:
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's dive into the world of JavaScript microbenchmarks. **What is tested?** The provided JSON represents two test cases, each testing different approaches to achieve a specific result: 1. **Regex approach**: The first test case uses a regular expression (`/.../g.test()`) to match a pattern in a string. 2. **Split and Pop approach**: The second test case uses the `split()` method with a separator (`.`) to split a string into substrings, and then selects the last substring using `pop()`. **Options compared** The two approaches are being compared, each attempting to achieve the same result: * Regular expression (`/.../g.test()`) * Splitting a string by dot (`'sfdsd.svgf.fdgdfg.-ssdfs23423.gif'.split('.').pop()`) These options have different characteristics that affect their performance: **Regex approach:** Pros: * Can be more flexible and powerful for complex pattern matching * Can be optimized using techniques like compile-time optimization, caching, or memoization Cons: * Can be slower due to the overhead of regular expression compilation and execution * May require more memory to store compiled patterns **Split and Pop approach:** Pros: * Generally faster, as it only requires a simple string splitting operation * Often has lower memory usage, as no additional data structures are created Cons: * Can be less flexible and less powerful than regular expressions for complex pattern matching * May not handle edge cases well (e.g., handling null or undefined inputs) **Library/Functionality used** Neither of the test cases uses a library or built-in function that significantly impacts the performance comparison. However, it's worth noting that some JavaScript engines may optimize certain string operations using specialized libraries or algorithms. **Special JS feature/syntax** The provided benchmark does not explicitly use any special JavaScript features or syntax that would affect its interpretation. The regular expression and split operations are standard features of the JavaScript language. **Other alternatives** Alternative approaches to achieve the same result might include: * Using a different string manipulation library (e.g., `substring()` instead of `split()`) * Employing a custom implementation using `indexOf()` or `lastIndexOf()` with conditional logic * Leveraging built-in functions like `RegExp.prototype.test()` and its performance optimizations It's essential to consider the trade-offs between these alternatives when optimizing JavaScript code for performance.
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