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slice vs substring vs substr on 10 chars
(version: 0)
Comparing performance of:
slice vs Substring vs substr
Created:
4 years ago
by:
Guest
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Script Preparation code:
var s1 = "0123456789";
Tests:
slice
var n1 = s1.slice(0, 6); var n2 = s1.slice(6);
Substring
var n1 = s1.substring(0, 6); var n2 = s1.substring(6, 10);
substr
var n1 = s1.substr(0, 6); var n2 = s1.substr(6, 10);
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (3)
Previous results
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Test case name
Result
slice
Substring
substr
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.1:latest
, generated one year ago):
Let's dive into the benchmark definition. **What is being tested?** The test case compares three different methods for extracting substrings from a string: 1. `slice` 2. `substring` 3. `substr` All these methods are used to create new strings by taking a subset of characters from an original string (`s1`). **Description of each method:** 1. **`slice`**: The `slice()` method takes two parameters: the start index and the end index (inclusive). It returns a new string containing the characters from the start index up to but not including the end index. * Example usage: `var n1 = s1.slice(0, 6);` 2. **`substring`**: The `substring()` method also takes two parameters: the start index and the end index (inclusive). It returns a new string containing the characters from the start index up to but not including the end index. * Example usage: `var n1 = s1.substring(0, 6);` 3. **`substr`**: The `substr()` method takes two parameters: the start index and the length of the substring (not the end index). It returns a new string containing the characters from the start index up to but not including the specified length. * Example usage: `var n1 = s1.substr(0, 6);` **Options being compared:** The test case is comparing the performance of these three methods for extracting substrings: * **`slice`**: Used with two indices (start and end) * **`substring`**: Also used with two indices (start and end) * **`substr`**: Used with a start index and a length **Pros and cons of each method:** 1. **`slice`**: + Pros: More flexible, can be used to create substrings by providing two indices. + Cons: Might be slower than the other methods for simple substring extractions (e.g., extracting from the start). 2. **`substring`**: + Pros: Simple and straightforward usage; often faster than `slice` for simple cases. + Cons: Can be less flexible than `slice`, as it assumes a contiguous substring extraction. 3. **`substr`**: + Pros: Often faster than the other methods for extracting substrings from the start of a string. + Cons: Less flexible than `slice`, as it requires specifying both the start index and the length. **Other considerations:** * The test case uses a specific string (`s1`) to perform the substring extractions. In real-world scenarios, you might be working with larger or more complex strings. * The performance differences between these methods can depend on various factors, such as browser implementation, JavaScript engine, and usage patterns. **Library/Feature used:** None are explicitly mentioned in this test case. However, if you're interested in learning more about libraries that provide efficient substring extraction methods, consider checking out the `str` library or other string manipulation libraries. That's a summary of the benchmark definition!
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