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replace vs replaceAll
(version: 0)
Comparing performance of:
replace vs replaceAll
Created:
5 years ago
by:
Guest
Go to the latest result
Tests:
replace
"Just checking some more things".replace(/ /g, "-");
replaceAll
"Just checking some more things".replaceAll(" ", "-");
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
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/132.0.0.0 Safari/537.36
Browser/OS:
Chrome 132 on Mac OS X 10.15.7
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=587962" width="100%" height="500px"></iframe>
replaceAll
5.2M/s
replace
4.4M/s
View exact numbers
Test name
Executions per second
✓
replaceAll
5,212,300 Ops/sec
replace
4,353,124 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
I'd be happy to explain the provided benchmark and its various components. **Benchmark Overview** The benchmark is designed to compare two methods for replacing characters in a string: `replace()` and `replaceAll()`. Both methods are part of the JavaScript String prototype, which provides various string manipulation functions. **Options Compared** In this benchmark, we have two options being compared: 1. **`String.prototype.replace()`**: This method replaces one or more occurrences of a pattern with a replacement string. 2. **`String.prototype.replaceAll()`**: This method is not a native JavaScript function; instead, it's often implemented as an alias for `String.prototype.replace()` when the regular expression pattern includes all possible characters (i.e., `g` flag). **Pros and Cons** Here are some pros and cons of each approach: * **`replace()`**: + Pros: - Widely supported across browsers and environments. - Easy to read and understand, with a simple syntax. + Cons: - Can be slower than `replaceAll()` for certain use cases, since it doesn't optimize for all possible character replacements. * **`replaceAll()`** (or implemented as `replace()`) : + Pros: - Can be faster than `replace()` in some cases, especially when replacing all characters. + Cons: - Not a native JavaScript function, so it might not work across all browsers and environments. - Requires careful implementation to ensure correct behavior. **Library and Special Features** In the provided benchmark code, we don't see any libraries being used explicitly. However, `replaceAll()` is often implemented as an alias for `replace()`, which relies on the JavaScript engine's optimization of regular expressions. No special JavaScript features or syntax are mentioned in this benchmark.
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