Toggle navigation
MeasureThat
.net
Create a benchmark
Tools
Feedback
FAQ
Register
Log In
String split using regex vs string v3
(version: 0)
Comparing performance of:
Split by regex vs Split by string
Created:
4 years ago
by:
Guest
Go to the latest result
Script Preparation code:
var string = 'salut comment ca va moi test pa adsk ldsj dkjasb kdaj akdajkda dkna dlkas mas '
Tests:
Split by regex
var res = string.split(/\btest\b/)
Split by string
var res = string.split('test')
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
Fork
Test case name
Result
Split by regex
Split by string
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
one year ago
)
User agent:
Mozilla/5.0 (X11; Linux x86_64; rv:134.0) Gecko/20100101 Firefox/134.0
Browser/OS:
Firefox 134 on Linux
View result in a separate tab
Embed
Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=604283" width="100%" height="500px"></iframe>
Split by string
16.6M/s
Split by regex
13.9M/s
View exact numbers
Test name
Executions per second
✓
Split by string
16,623,416 Ops/sec
Split by regex
13,888,588 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
I'd be happy to explain the benchmark and its options. **Benchmark Overview** The provided JSON represents a JavaScript microbenchmarking test case, specifically measuring the performance of string splitting using two different approaches: regular expressions (regex) and plain string slicing. The test uses a predefined string variable `string` that contains a long sequence of characters with the substring "test" embedded within it. **Options Compared** The benchmark compares the performance of two options: 1. **Split by Regex**: This approach uses the `split()` method with a regular expression to split the input string into substrings. 2. **Split by String**: This approach uses the `split()` method without any arguments, relying on the default behavior to split the string at whitespace characters (spaces and tabs) or use an empty separator. **Pros and Cons** Here's a brief summary of each option: * **Split by Regex**: + Pros: More flexible and powerful than plain string splitting, as it can handle complex patterns and escaped special characters. + Cons: Slower due to the overhead of compiling and executing the regex pattern. * **Split by String**: + Pros: Faster and more lightweight, as it doesn't require the additional processing time for regex compilation. + Cons: Less flexible and may not work correctly with non-whitespace characters or escaped special characters. **Library** In this benchmark, no specific library is required or used beyond the built-in JavaScript `split()` method. However, in general, libraries like RegEx (e.g., `regex.js`) can be used to simplify regex syntax and provide more features. **Special JS Feature/Syntax** This benchmark uses the `var` keyword for variable declaration, which was a common practice in early versions of JavaScript. Modern JavaScript recommends using `let` or `const` instead, as they offer better scoping and binding behavior. In summary, this benchmark allows users to compare the performance of two string splitting approaches: one using regular expressions and another relying on whitespace characters. The choice between these options depends on the specific use case and performance requirements. **Other Alternatives** If you need more advanced or specialized string splitting capabilities, consider using: 1. **String.prototype.split() with a custom regex pattern**: You can create a custom regex pattern using the `RegExp` constructor to achieve more complex splitting scenarios. 2. **Third-party libraries like RegEx**: As mentioned earlier, RegEx provides a simpler and more readable way to work with regular expressions in JavaScript. Keep in mind that for most use cases, the built-in `split()` method or simple string slicing should suffice. However, if you need more advanced features or customization options, consider using one of these alternatives.
Related benchmarks
String split using regex vs string v2
String split separator vs regex
Comments
Confirm delete:
Do you really want to delete benchmark?