Toggle navigation
MeasureThat
.net
Create a benchmark
Tools
Feedback
FAQ
Register
Log In
String.replace() vs String.replaceAll()
(version: 0)
Comparing performance of:
String.replace() vs String.replaceAll()
Created:
3 years ago
by:
Guest
Go to the latest result
Tests:
String.replace()
'alguma coisa espaçada'.replace(/ /g, '-')
String.replaceAll()
'alguma coisa espaçada'.replaceAll(' ', '-')
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
Fork
Test case name
Result
String.replace()
String.replaceAll()
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
11 months ago
)
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:142.0) Gecko/20100101 Firefox/142.0
Browser/OS:
Firefox 142 on Windows
View result in a separate tab
Embed
Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=615978" width="100%" height="500px"></iframe>
String.replaceAll()
33.9M/s
String.replace()
19.2M/s
View exact numbers
Test name
Executions per second
✓
String.replaceAll()
33,867,504 Ops/sec
String.replace()
19,196,230 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the provided JSON and explain what's being tested. **Benchmark Definition** The benchmark measures the performance difference between two JavaScript methods for replacing spaces in a string: `replace()` and `replaceAll()` (note that this is a TypeScript method, not JavaScript). **Options Compared** Two approaches are compared: 1. `String.replace()`: This method uses a regular expression to replace all occurrences of a pattern in a string. In this case, the pattern is a space (`/ /g`). 2. `String.replaceAll()`: This method also uses a regular expression to replace all occurrences of a pattern in a string. However, it's worth noting that `replaceAll()` is not a standard JavaScript method; it's more commonly used in other programming languages like Java or C#. In TypeScript, the equivalent method is `replace()`. **Pros and Cons** 1. `String.replace()`: Pros: * Widely supported in browsers and Node.js. * Can be more efficient for simple replacements. Cons: * May not work as expected with Unicode characters that have multiple forms (e.g., accented letters). 2. `String.replaceAll()` (TypeScript): Pros: * More explicit and readable syntax. * Supports Unicode characters out of the box. Cons: * Less widely supported in older browsers and Node.js versions. **Library and Purpose** There is no library explicitly mentioned in the JSON, but it's worth noting that both `String.replace()` and `String.replaceAll()` rely on the browser's or engine's implementation of regular expressions. If you're interested in using a dedicated regex library, you can explore options like `jsregex` or `regexpr`. **Special JS Feature** There is no special JavaScript feature or syntax mentioned in the JSON. **Other Considerations** When writing benchmarks, it's essential to consider factors like: * Input size and distribution: How does the input string vary between tests? Are there edge cases that might affect performance? * Optimization techniques: Can you apply any optimizations, such as memoization or caching, to reduce the overhead of repeated calls to `replace()` or `replaceAll()`? * Browser and Node.js version dependencies: Which versions are most relevant for your target audience? **Alternatives** If you're interested in exploring alternative approaches, consider: * Using a library like `jsregex` or `regexpr` to implement regular expressions. * Implementing the replacement logic yourself using bitwise operations or other techniques. * Using a different string manipulation method, such as `String.prototype.split()` and `join()`. * Measuring performance with different input sizes or distributions.
Related benchmarks
replaceAll vs replace with /g
Comments
Confirm delete:
Do you really want to delete benchmark?