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replaceAll vs regex replace (no prep code)
(version: 0)
Comparing performance of:
replace regex vs replace All
Created:
4 years ago
by:
Guest
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Tests:
replace regex
"this is it".replace(/ /g, "+");
replace All
"this is it".replaceAll(" ", "+");
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
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Test case name
Result
replace regex
replace All
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) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/129.0.0.0 Safari/537.36
Browser/OS:
Chrome 129 on Windows
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<iframe src="https://measurethat.net/Embed?id=561699" width="100%" height="500px"></iframe>
replace regex
6.9M/s
replace All
6.1M/s
View exact numbers
Test name
Executions per second
✓
replace regex
6,892,097 Ops/sec
replace All
6,105,952 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the provided benchmark definition and test cases to understand what is being tested. **Benchmark Definition** The benchmark definition is a simple JavaScript expression that uses two different methods to replace all occurrences of whitespace characters (` `) with a plus sign (`+`). The two methods are: 1. `replace()` method, which is part of the String prototype in JavaScript. 2. `replaceAll()` method (also known as `replaceAll()`), which is not a standard method in JavaScript but might be provided by some libraries or frameworks. **Options Compared** The benchmark compares the performance of these two methods: * `replace()` method * `replaceAll()` method **Pros and Cons** 1. **`replace()` method**: * Pros: widely supported, efficient, and relatively simple to implement. * Cons: might not be as fast as specialized methods like `replaceAll()`, especially for large inputs. 2. **`replaceAll()` method**: * Pros: potentially faster than the `replace()` method, especially for regular expressions with complex patterns. * Cons: not a standard method in JavaScript, which means it might not be supported by all browsers or environments. Other considerations: * The benchmark does not compare the performance of using regular expressions versus string replacement methods. This could provide additional insights into the trade-offs between these approaches. * The benchmark does not account for potential overheads like parsing, compiling, or caching that might affect the performance of these methods. **Library and Special JS Features** The `replaceAll()` method is likely provided by a library or framework that extends or supplements the standard JavaScript API. This could be a third-party library, a custom implementation, or even a browser extension. If you're interested in using this method, you might need to include additional dependencies or scripts in your project. **Test Case** The test case uses a simple string literal `"this is it"`. The replacement operation will remove all whitespace characters from the string, leaving only the content `"it"`. In summary, this benchmark tests the performance difference between two methods for replacing all occurrences of whitespace characters with a plus sign: the standard `replace()` method and a potentially faster but non-standard `replaceAll()` method.
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