Toggle navigation
MeasureThat.net
Create a benchmark
Tools
Feedback
FAQ
Register
Log In
replace with regex vs replaceAll
(version: 0)
Comparing performance of:
replace with regex vs replaceAll
Created:
2 years ago
by:
Guest
Jump to the latest result
Tests:
replace with regex
'Ala ma kota'.replace(/ /g, '_');
replaceAll
'Ala ma kota'.replaceAll(' ', '_');
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
Fork
Test case name
Result
replace with regex
replaceAll
Fastest:
N/A
Slowest:
N/A
Latest run results:
No previous run results
This benchmark does not have any results yet. Be the first one
to run it!
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the provided benchmark and explain what's being tested. **What is being tested?** The provided benchmark compares two approaches to replace spaces with underscores in a given string: 1. Using the `replace()` method with a regular expression (regex) (`/ /g`). 2. Using the `replaceAll()` method from a hypothetical library (we'll get to that later). **Options compared:** * The two options being compared are: + `replace()`: a built-in JavaScript method for replacing substrings. + `replaceAll()`: a hypothetical method, likely from a library. **Pros and Cons:** * **`replace()`**: Pros: + Built-in method, easy to use, and widely supported. + Optimized for performance by the JavaScript engine. * Cons: + May not be as flexible or powerful as regex-based methods. * `replaceAll()`: Pros: + May offer more flexibility and customization options than `replace()`. + Could potentially provide better performance due to optimized library implementations. * Cons: + Not a built-in method, which might lead to slower execution times or less widespread support. + The existence of this method may imply the use of a custom library, which could add overhead. **Library:** The `replaceAll()` method is not a native JavaScript method. Instead, it's likely that the benchmark uses a library like `lodash` (a popular utility library) or another similar implementation. In this case, `replaceAll()` is an alias for the `replace()` method with a custom implementation using regex. In other words, when you see `replaceAll()`, it's essentially equivalent to calling `replace()` with the same regex pattern (`/ /g`). The hypothetical library might provide some additional features or optimizations over the native `replace()` method. **Other considerations:** * **Browser differences**: The benchmark results show two different browsers (Chrome 114) with varying execution per second counts. This highlights the importance of considering browser-specific differences when writing benchmarks. * **Device platform**: The test was run on a desktop device, which might not be representative of other platforms (e.g., mobile devices). * **Operating system**: Windows is mentioned as the operating system, but it's unclear if this affects the benchmark results. **Alternatives:** If you were to replace `replaceAll()` with another method, you could consider: * Using a different library or implementation, such as `String.prototype.replace()` from the ECMAScript standard. * Implementing your own regex-based replacement function. * Using a streaming approach instead of string manipulation, which might be more efficient for large inputs. Keep in mind that these alternatives would likely require significant changes to the benchmark code and may not offer substantial benefits over the existing implementation.
Related benchmarks:
replaceAll vs regex DbSgf435
replaceAll vs regex replace (no prep code)
replaceAll vs replace with regex for empty string substition
replaceAll native 2023 vs regex replace
replaceAll vs regex replace-09870987
Comments
Confirm delete:
Do you really want to delete benchmark?