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Replace Comparison
(version: 0)
Comparing performance of:
Regex replace vs replaceAll
Created:
4 years ago
by:
Guest
Go to the latest result
Tests:
Regex replace
'(2,000.50)'.replace(/[^\d\,\.]/g, '');
replaceAll
'(2,000.50)'.replaceAll(')', '').replaceAll('(', '-').replaceAll(',', '');
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
Regex replace
replaceAll
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/127.0.0.0 Safari/537.36
Browser/OS:
Chrome 127 on Mac OS X 10.15.7
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=540066" width="100%" height="500px"></iframe>
replaceAll
6.3M/s
Regex replace
1.8M/s
View exact numbers
Test name
Executions per second
✓
replaceAll
6,262,198 Ops/sec
Regex replace
1,829,621 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's dive into the world of MeasureThat.net and explore the JavaScript microbenchmark. **Benchmark Definition** The provided JSON represents a benchmark definition with two test cases: 1. `Replace Comparison` 2. `Regex replace` 3. `replaceAll` These three tests are designed to measure the performance of different approaches for comparing numbers in JavaScript. **Options Compared** In this benchmark, we have two primary options being compared: 1. **Regular Expression (regex) replacement**: This approach uses the `replace()` method with a regex pattern to remove non-numeric characters from the input string. 2. **replaceAll() method**: This is a newer method introduced in ECMAScript 2019, which replaces all occurrences of a substring with another value. **Pros and Cons** **Regex Replacement (replace())** Pros: * Widely supported by most browsers * Allows for complex pattern matching Cons: * Can be slower than other approaches due to the overhead of regex engine execution * May have performance issues if not optimized correctly **replaceAll() method** Pros: * Newer and potentially more efficient, as it leverages native browser optimizations * More readable and maintainable code Cons: * May not be supported by older browsers (pre-ECMAScript 2019) * Can be less performant for certain types of input data **Other Considerations** The `replaceAll()` method is a more modern approach, but it's essential to note that its performance may vary depending on the browser and specific use case. The regex replacement approach, while older, can still provide good results with proper optimization. **Library Usage** There are no libraries explicitly mentioned in the provided benchmark definition. However, some browsers might have their own implementation of `replaceAll()` or similar methods. **Special JS Features/Syntax** No special JavaScript features or syntax are used in this benchmark. The tests focus solely on comparing numbers using different approaches. **Alternatives** If you're looking for alternative approaches to compare numbers in JavaScript, here are a few options: 1. **Introducing `Number()`**: You can use the `Number()` function to convert a string to a number, which might be faster than regex replacement or `replaceAll()`. 2. **Using `Float64Array`**: If you're working with numerical data, using a `Float64Array` might provide better performance than regular numeric comparisons. 3. **Caching and memoization**: You can use caching and memoization techniques to store intermediate results and avoid repeated calculations. Keep in mind that these alternatives may not be as widely supported or optimized as the original approaches used in the benchmark.
Related benchmarks
String.replace() vs String.replaceAll()
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