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ReplaceAll vs Replace with Regex on a Guid
(version: 0)
Benchmark.js
Comparing performance of:
Regex vs Replace All
Created:
2 years ago
by:
Guest
Go to the latest result
Tests:
Regex
"b85168e9-40ca-4197-b903-fb07a4a94a38".replace(/-/g, "+");
Replace All
"b85168e9-40ca-4197-b903-fb07a4a94a38".replaceAll('-', "+");
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
Regex
Replace All
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
2 years ago
)
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.36
Browser/OS:
Chrome 123 on Mac OS X 10.15.7
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=516465" width="100%" height="500px"></iframe>
Regex
8.5M/s
Replace All
7.2M/s
View exact numbers
Test name
Executions per second
✓
Regex
8,464,967 Ops/sec
Replace All
7,196,858 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's dive into the world of JavaScript microbenchmarks! **What is being tested?** The provided benchmark measures the performance difference between two approaches to replace a hyphen (-) in a GUID (Globally Unique Identifier) string: using a regular expression (`/-/g` with `\+`) and using a `replaceAll()` method. **Options compared:** 1. **Regular Expression (Regex)**: This approach uses a pattern to match the hyphen characters, which are then replaced with a plus sign (`\+`). The `/g` flag at the end of the pattern ensures that all occurrences are replaced, not just the first one. 2. **Replace All**: This approach uses the `replaceAll()` method, which is a built-in JavaScript function that replaces all occurrences of a specified value in a string. **Pros and Cons:** 1. **Regular Expression (Regex)**: * Pros: Can handle more complex pattern matching, potentially faster for large strings. * Cons: May be slower due to the overhead of creating and executing the regex engine. 2. **Replace All**: * Pros: Typically faster, as it's a built-in function optimized for performance. * Cons: Limited to simple replacement patterns; may not handle more complex cases. **Library usage:** There is no library explicitly mentioned in the benchmark definition or test cases. However, the `replaceAll()` method is a part of the JavaScript standard library, so it relies on the language's built-in functionality. **Special JS feature/syntax:** None are mentioned in this specific benchmark. However, if you were to explore other benchmark tests, you might encounter features like: * `let` and `const` declarations (for scoping and variable bindings) * `async/await` for asynchronous programming * `Symbol` properties for unique identifier generation * etc. **Other alternatives:** If the benchmarker wanted to add more options, they could explore other approaches, such as: 1. **Using a custom function**: Implementing a custom function with string manipulation logic. 2. **Using a library like Lodash**: Which provides utility functions for string manipulation and replacement. 3. **Using a regex alternative**: Like the `replace()` method on an object or an array of characters. Keep in mind that each approach would have its own trade-offs, performance characteristics, and potential pitfalls. That's a summary of what's being tested in this benchmark!
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replaceAll vs regex replace (no prep code)
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