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replaceAll vs regex replace pt3
(version: 0)
Comparing performance of:
replace regex vs replace All vs split & join
Created:
2 years ago
by:
Guest
Go to the latest result
Tests:
replace regex
"Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.".replace(/ /g, "+");
replace All
"Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.".replaceAll(" ", "+");
split & join
"Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.".split(" ").join("+");
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (3)
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Test case name
Result
replace regex
replace All
split & join
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/605.1.15 (KHTML, like Gecko) Version/17.3.1 Safari/605.1.15
Browser/OS:
Safari 17 on Mac OS X 10.15.7
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=504660" width="100%" height="500px"></iframe>
replace regex
181.8M/s
split & join
396K/s
replace All
265K/s
View exact numbers
Test name
Executions per second
✓
replace regex
181,849,536 Ops/sec
split & join
395,741 Ops/sec
replace All
265,240 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Measuring the performance of different string manipulation approaches is crucial for optimizing JavaScript code. The provided benchmark measures three common methods to replace or manipulate strings: 1. **Regex Replace**: This method uses regular expressions to search and replace specific patterns in the string. The `/ /g` pattern matches one or more whitespace characters, and `+` is used as a replacement character. 2. **Replace All**: This method uses the built-in `replaceAll()` function to replace all occurrences of a specified pattern with a new value. In this case, it replaces all whitespace characters with `+`. 3. **Split & Join**: This method splits the string into an array using a separator (in this case, whitespace), joins the array elements back into a string with a different separator (`+`). **Pros and Cons of each approach:** 1. **Regex Replace**: * Pros: + Can handle complex patterns and replacements. + More flexible than other methods. * Cons: + Slower due to the overhead of regular expression processing. + Can be less efficient for simple string manipulation tasks. 2. **Replace All**: * Pros: + Fast and efficient, as it uses a built-in function optimized for performance. + Simple and easy to use. * Cons: + Limited flexibility compared to Regex Replace. + May not work well with complex patterns or edge cases. 3. **Split & Join**: * Pros: + Fast and efficient, as it uses built-in string methods optimized for performance. + Simple and easy to use. * Cons: + Only suitable for simple splitting and joining tasks. + May not work well with complex patterns or edge cases. **Library usage:** None of the provided benchmark tests explicitly use any external libraries. However, some browsers may include additional libraries or APIs that can affect performance, such as Safari's `String.prototype.replaceAll()` method, which is an implementation of the regular expression replace functionality. **Special JS features or syntax:** * None mentioned in the provided examples. * If you'd like to explore other approaches, consider using the `String.prototype.replace()` and `String.prototype.split()` methods, which are built into the JavaScript standard library.
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replaceAll vs regex replace (no prep code)
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