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Split vs Regex tes cstom
(version: 0)
Comparing performance of:
Splitting29964 vs Regex99
Created:
2 years ago
by:
Guest
Go to the latest result
Script Preparation code:
var testString = "testing,Newlines,Bleh"
Tests:
Splitting29964
var values = testString.split(","); var value1 = values[0]; var value2 = values[1]; var value3 = values[2];
Regex99
var regex = /.+((?=,)|$)/g var value1 = regex[0]; var value2 = regex[1]; var value3 = regex[2];
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
Splitting29964
Regex99
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
2 years ago
)
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36
Browser/OS:
Chrome 126 on Mac OS X 10.15.7
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=532922" width="100%" height="500px"></iframe>
Regex99
52.3M/s
Splitting29964
16.9M/s
View exact numbers
Test name
Executions per second
✓
Regex99
52,343,048 Ops/sec
Splitting29964
16,885,598 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's dive into the world of JavaScript microbenchmarks on MeasureThat.net. **What is tested?** The provided JSON represents two individual test cases, each designed to measure the performance of different approaches for extracting values from a string. **Options compared:** There are two options being compared: 1. **String Split**: This approach uses the `split()` method with a comma (`,`) as the separator to split the input string into an array of values. 2. **Regular Expressions (Regex)**: This approach uses a regular expression (`/.+((?=,)|$)/g`) to extract values from the input string. **Pros and Cons:** 1. **String Split**: * Pros: + Easy to understand and implement. + Fast for simple use cases with well-defined separators. * Cons: + Can be slow if the separator is not found, or if the input string contains many separators. + May not work correctly for edge cases (e.g., null or undefined values). 2. **Regular Expressions (Regex)**: * Pros: + Highly flexible and powerful for complex pattern matching. + Can handle edge cases more effectively than string split. * Cons: + Steeper learning curve due to the complexity of regular expressions. + Performance may be slower compared to string split, especially for simple use cases. **Library usage:** In the provided benchmark code, no libraries are explicitly mentioned. However, it's worth noting that some JavaScript engines (e.g., V8) have built-in support for regular expression optimizations, which might affect performance. **Special JS feature or syntax:** There are a few notable features and syntax elements used in this benchmark: 1. **Template literals (`\`)**: Used to create string literals with embedded expressions. 2. **Arrow functions (`=>`)**: Used as shorthand for function declarations (not explicitly shown, but implied by the `Benchmark Definition`). **Other alternatives:** Alternative approaches to extracting values from a string could include: 1. **Array methods (e.g., `map()`, `filter()`)** 2. **String manipulation functions (e.g., `indexOf()`, `substr()`)** 3. **Regular expression alternatives (e.g., `.match()` instead of `.exec()`)** Keep in mind that each approach has its trade-offs, and the choice ultimately depends on the specific requirements and constraints of the project. I hope this explanation helps! Let me know if you have any further questions or need clarification on any of these points.
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