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Regex vs split/join 23313
(version: 0)
Comparing performance of:
Regex vs Split and Join
Created:
3 years ago
by:
Guest
Go to the latest result
Script Preparation code:
var str = '/3123/213/123/412/41/4';
Tests:
Regex
str.replace(/\//g, "$&Z");
Split and Join
str.split('').join('Z') + 'Z';
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
Regex
Split and Join
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
one year ago
)
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:132.0) Gecko/20100101 Firefox/132.0
Browser/OS:
Firefox 132 on Windows
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=567751" width="100%" height="500px"></iframe>
Split and Join
4.5M/s
Regex
1.3M/s
View exact numbers
Test name
Executions per second
✓
Split and Join
4,505,553 Ops/sec
Regex
1,327,056 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down what's being tested in this JavaScript microbenchmark. **Benchmark Definition** The benchmark is designed to compare the performance of two approaches: using a regular expression (`Regex`) and splitting an array of strings into individual elements and then joining them back together using `join()` (`Split and Join`). **Script Preparation Code** The script preparation code defines a single input string: ```javascript var str = '/3123/213/123/412/41/4'; ``` This is the string that will be used as input for both benchmarking approaches. **Options Compared** Here's what's being compared: * `Regex` (using `replace()` method with a regular expression) + Pros: - Can match and replace patterns in the string - Can handle complex regular expressions + Cons: - May be slower than other approaches due to parsing and execution time of the regex engine - May have performance issues if the pattern is too complex or large * `Split and Join` (using `split()` and `join()` methods) + Pros: - Typically faster than regex due to native support for array manipulation - Can be more readable and maintainable, especially for simple use cases **Library Used** There doesn't appear to be any explicit libraries used in this benchmark. However, it's worth noting that `Regex` relies on the JavaScript engine's built-in regex functionality. **Special JS Features or Syntax** None mentioned. **Other Considerations** When choosing between these two approaches, consider the following: * If you need to perform complex pattern matching or string manipulation, `Regex` might be a better choice. However, this comes at the cost of potential performance issues. * If you're working with simple strings and need fast execution, `Split and Join` is likely a better option. **Alternatives** Some alternative approaches could include: * Using a different string manipulation library (e.g., jQuery) * Implementing a custom string processing algorithm * Utilizing WebAssembly or native code for performance-critical tasks However, these alternatives would require significant modifications to the benchmark and are not immediately apparent from the provided information. Overall, this benchmark provides a straightforward comparison of two common JavaScript approaches to string manipulation: `Regex` and `Split and Join`. By analyzing the results, developers can gain insights into which approach might be better suited for their specific use case.
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