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replaceAll vs rgx replace
(version: 0)
Comparing performance of:
replace regex vs replace All
Created:
2 years ago
by:
Registered User
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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:
2 years ago
)
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.36
Browser/OS:
Chrome 119 on Mac OS X 10.15.7
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<iframe src="https://measurethat.net/Embed?id=523070" width="100%" height="500px"></iframe>
replace regex
12.3M/s
replace All
10.3M/s
View exact numbers
Test name
Executions per second
✓
replace regex
12,294,145 Ops/sec
replace All
10,267,927 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
I'll break down the provided benchmark definition and test cases to explain what's being tested, compared, and the pros/cons of each approach. **Benchmark Definition** The provided JSON defines two benchmarks: 1. `replaceAll vs rgx replace`: This is the main benchmark that compares two approaches: using the `replaceAll` method with a regular expression (regex) and using a regex with the `/g` flag. 2. Script Preparation Code and HTML Preparation Code are empty, which means there's no code to prepare before running the benchmarks. **Individual Test Cases** There are two test cases: 1. **"replace regex"`: This test case runs the JavaScript code: ```javascript "This is it".replace(/ /g, "+"); ``` This code uses a regular expression (`/ /g`) with the `/g` flag to replace all spaces in the string `this is it` with the character `+`. 2. **"replace All"`: This test case runs the JavaScript code: ```javascript this is it.replaceAll(" ", "+"); ``` This code uses a method called `replaceAll` (not a standard JavaScript method) to replace all spaces in the string `this is it` with the character `+`. However, I assume this is likely a typo or an implementation of the `replaceAll` method specific to some library. **What's being tested** The two test cases are comparing the performance of replacing strings using different approaches: 1. Using a regular expression with the `/g` flag (test case: "replace regex"). 2. Using a non-standard `replaceAll` method or an implementation of it (test case: "replace All"). **Pros and Cons** Here's a brief summary of each approach: 1. **Using a regular expression with the `/g` flag (`"replace regex"`)**: * Pros: Efficient, as it only scans the string once. * Cons: May not be optimal for large strings or complex replacements. 2. **Using a non-standard `replaceAll` method (`"replace All"`)**: * Pros: None mentioned in the benchmark definition. * Cons: Unknown performance characteristics, possibly slower than the first approach. **Library Usage** The library being used here is likely one of the following: 1. A custom implementation of the `replaceAll` method (as mentioned in test case "replace All"). 2. A utility library that provides a `replaceAll` function (e.g., Lodash). **Special JavaScript Feature/Syntax** There's no mention of any special JavaScript features or syntax being used here. **Alternatives** Other alternatives for replacing strings could include: 1. Using the `replace()` method with an array of replacement characters. 2. Using a library like Lodash, which provides a `replaceAll` function. 3. Using a string replace function from a dedicated library (e.g., String.prototype.replaceAll() in some implementations). Keep in mind that these alternatives may not be relevant to the specific benchmark definition and test cases provided.
Related benchmarks
replaceAll vs replace with /g
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