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replaceAll browser vs regex replace
(version: 0)
Comparing performance of:
replace regex vs replace All
Created:
2 years ago
by:
Guest
Go to the latest result
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:
2 years ago
)
User agent:
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36
Browser/OS:
Chrome 121 on Linux
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<iframe src="https://measurethat.net/Embed?id=502940" width="100%" height="500px"></iframe>
replace regex
6.0M/s
replace All
4.9M/s
View exact numbers
Test name
Executions per second
✓
replace regex
6,036,789 Ops/sec
replace All
4,910,933 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the provided JSON data and explain what's being tested. **Overview** The benchmark is designed to compare two approaches: using the `replace()` method with regular expressions (`/ /g, "+"`), and using the `replaceAll()` method with a replacement string (`" \", "+"`). **What's being compared?** 1. **Regular Expressions (Regex)**: The `replace()` method uses Regex to search for spaces (`/ /`) in the string `"this is it"`, and replaces them with `+`. This approach allows for more complex pattern matching, but can be slower due to the overhead of parsing and executing the regex. 2. **String Replacement**: The `replaceAll()` method takes a replacement string (`"+"`), which is applied directly to the original string without any additional processing. **Pros and Cons** 1. **Regex (replace())**: * Pros: + Can handle more complex patterns, such as multiple spaces or special characters. + Can be used for other tasks beyond simple string replacement. * Cons: + Can be slower due to the overhead of parsing and executing regex. + More difficult to read and maintain, especially for simple cases. 2. **String Replacement (replaceAll())**: * Pros: + Faster execution speed, since it doesn't involve additional processing or parsing. + Easier to understand and maintain, as the logic is straightforward. * Cons: + Limited to only replacing spaces with a single character (`+`). **Library** None of the test cases use any external libraries. The benchmark focuses solely on comparing these two basic string replacement methods. **Special JS Features/Syntax** There are no special JavaScript features or syntax used in this benchmark. The tests are straightforward and rely on basic string manipulation functions. **Other Alternatives** If you were to compare other approaches, some alternatives could include: 1. **Using `String.prototype.replace()` with a callback**: Instead of using the `replace()` method directly, you could use a callback function to perform the replacement. 2. **Using `String.prototype.replace()` with a regex pattern and function**: You could also use a regex pattern as the second argument, along with an optional function to apply to the match. Here's a brief example of how this might be implemented: ```javascript const str = "this is it"; str = str.replace(/ /g, (match) => "+"); ``` Keep in mind that these alternatives would likely have similar performance characteristics and trade-offs compared to the original `replace()` and `replaceAll()` methods. In summary, the benchmark provides a simple comparison of two string replacement methods: using regular expressions with the `replace()` method versus using the `replaceAll()` method. This allows users to evaluate which approach is faster and more efficient for their specific use case.
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