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replaceAll vs regex replace native
(version: 0)
Comparing performance of:
replace regex vs replace All
Created:
one year ago
by:
Guest
Go to the latest result
Tests:
replace regex
"this is it".replace(/ /g, "+");
replace All
"this is it".replaceAll(" ", "+");
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
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Test case name
Result
replace regex
replace All
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
one year ago
)
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/128.0.0.0 Safari/537.36
Browser/OS:
Chrome 128 on Mac OS X 10.15.7
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<iframe src="https://measurethat.net/Embed?id=552554" width="100%" height="500px"></iframe>
replace regex
11.9M/s
replace All
10.0M/s
View exact numbers
Test name
Executions per second
✓
replace regex
11,940,783 Ops/sec
replace All
10,004,779 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
I'd be happy to help you understand the provided JavaScript microbenchmark. **Benchmark Definition and Options** The benchmark compares two approaches for replacing whitespace characters in a string: 1. `replace()` method with a regular expression (regex): This approach uses the `String.prototype.replace()` method, which applies a regex pattern to each character in the string, replacing matches with a specified replacement value. 2. `replaceAll()` method: This is not a built-in JavaScript method. Instead, it's likely a custom implementation that mimics the behavior of the `replace()` method for multiple whitespace characters. **Pros and Cons** - **replace() method (regex)**: + Pros: Efficient and widely supported by modern browsers. + Cons: Can be slower than the alternative approach if used with complex regex patterns, and may not work as expected in older browsers or those that don't support Unicode characters. - `replaceAll()` method (custom implementation): + Pros: May be faster for simple cases and works consistently across browsers, assuming a correct implementation. + Cons: Uncommon and might require more code to implement correctly. **Library and Special Features** There are no libraries mentioned in the provided benchmark definition. However, if you're interested in exploring alternatives or learning about regex patterns, I can provide some resources. The `replace()` method uses special features like: * Regex patterns (e.g., `/ /g`, `\+`) * String literals (e.g., `"this is it".replace(...)`) * Function calls (e.g., `.replace()`) * Global and flag options for the regex pattern If you're interested in learning more about regex, I can provide some resources or explanations. **Other Alternatives** Some other alternatives to measure string replacement performance include: 1. Using a different library like `lodash` or `string-promise`, which might implement optimized string replacement methods. 2. Implementing a custom string replacement algorithm using JavaScript's built-in array and loop operations. 3. Comparing the performance of regex engines like ` RegExp` (Native) vs. `String.prototype.replace()`. Keep in mind that these alternatives will likely produce different results or be more challenging to set up, depending on your specific use case. For a wide range of software engineers, I recommend focusing on understanding the basics of string replacement using built-in JavaScript methods and exploring optimizations as needed for performance-critical applications.
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replaceAll vs regex replace (no prep code)
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