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split index 0 vs regex replace v2
(version: 0)
Comparing performance of:
replace regex vs split index 0 vs slice
Created:
one year ago
by:
Guest
Go to the latest result
Tests:
replace regex
'20240910T13:45:22.030Z'.replace(/T.*$/, '');
split index 0
'20240910T13:45:22.030Z'.split("T")[0];
slice
'20240910T13:45:22.030Z'.slice(0, 8);
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (3)
Previous results
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Test case name
Result
replace regex
split index 0
slice
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/128.0.0.0 Safari/537.36
Browser/OS:
Chrome 128 on Windows
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=554699" width="100%" height="500px"></iframe>
slice
162.2M/s
split index 0
29.3M/s
replace regex
18.8M/s
View exact numbers
Test name
Executions per second
✓
slice
162,179,136 Ops/sec
split index 0
29,254,788 Ops/sec
replace regex
18,792,946 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the benchmark and its various components. **Benchmark Definition** The benchmark definition is a JSON object that represents the test case to be executed. In this case, there are three test cases: 1. `split index 0`: This test case uses the `split()` method with an index of 0 to split a string. 2. `replace regex`: This test case uses the `replace()` method with a regular expression to replace a part of a string. 3. `slice`: This test case uses the `slice()` method to extract a subset of characters from a string. **Options Compared** The benchmark is comparing three different approaches: 1. **`split()`**: This method splits a string into an array of substrings using a specified separator. In this case, it's used with an index of 0. 2. **`replace()`**: This method replaces occurrences of a specified pattern in a string with another value. 3. **`slice()`**: This method extracts a subset of characters from a string. **Pros and Cons** Here are the pros and cons of each approach: 1. **`split()`**: * Pros: Fast, efficient, and easy to use. * Cons: Can be slow for large strings or complex separators. 2. **`replace()`**: * Pros: Can handle complex patterns and substitutions. * Cons: Can be slower than `split()` due to the overhead of regular expressions. 3. **`slice()`**: * Pros: Fast, efficient, and easy to use for substring extraction. * Cons: Limited to extracting substrings; can't perform complex string operations. **Library and Purpose** None of the test cases use a library explicitly. However, it's likely that the `split()` method is implementing some form of internal logic to handle splitting strings. **Special JS Features or Syntax** There are no special JavaScript features or syntax used in this benchmark. All three methods (`split()`, `replace()`, and `slice()`) are standard JavaScript methods. **Other Alternatives** If you need alternative methods for string manipulation, here are a few options: 1. **`substr()`**: Similar to `slice()`, but returns a substring starting from the beginning of the original string. 2. **`substring()`**: A variant of `slice()` that takes an offset and length as arguments. 3. **`indexOf()`** and ``lastIndexOf()`**: These methods search for the presence of a specified value in a string and return its index. These alternatives may offer different trade-offs in terms of performance, ease of use, or feature set compared to the original three methods.
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