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sub vs split
(version: 0)
Comparing performance of:
sub vs split
Created:
3 years ago
by:
Guest
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Tests:
sub
const address = '100 Queen St W, Toronto, ON M5H 2N2'; const substr = address.substring(0, address.indexOf(' '));
split
const address = '100 Queen St W, Toronto, ON M5H 2N2'; const civicNumber = address.split(' ')[0];
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Suite status:
<idle, ready to run>
Run tests (2)
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Test case name
Result
sub
split
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
I'll break down the explanation into manageable parts. **Benchmark Definition** The benchmark definition is a JSON object that represents the test case being run on MeasureThat.net. In this case, there are two test cases: "sub" and "split". **Sub vs Split Benchmark** The test case compares two approaches for extracting the civic number from an address string: 1. **Substring (`substring` method)**: * Code: `const substr = address.substring(0, address.indexOf(' '));` * Purpose: This approach uses the `indexOf` method to find the index of the first space character in the string, and then extracts a substring starting from that index. 2. **Split (`split` method)**: * Code: `const civicNumber = address.split(' ')[0];` * Purpose: This approach splits the entire address string into an array using spaces as separators, and then takes the first element of the resulting array. **Options Compared** The benchmark compares the performance of these two approaches: 1. **Substring**: Uses the `substring` method to extract a substring. 2. **Split**: Uses the `split` method to split the string into an array. **Pros and Cons** * **Substring**: + Pros: Simple, efficient, and easy to understand. + Cons: May not be as readable or maintainable for complex strings, and can lead to off-by-one errors if the index calculation is incorrect. * **Split**: + Pros: More expressive, readable, and maintainable, especially for complex strings with multiple separators. However, it may create additional overhead due to the array creation. + Cons: May be slower than the `substring` method due to the array creation. **Other Considerations** * Both approaches assume that the civic number is always separated by a space character. If this assumption is not valid, alternative methods should be used. * The `split` method can handle multiple separators (e.g., commas, semicolons), while the `substring` method only works with a single separator. **Library and Special JS Features** There are no libraries mentioned in this benchmark definition. However, it's worth noting that the `split` method is an array method, which uses JavaScript's built-in array data structure. There are no special JS features or syntax involved in this benchmark. **Alternatives** Other approaches to extract the civic number from a string could include: 1. **Regular Expressions**: Using regular expressions (regex) can provide more flexibility and control over the extraction process. 2. **String manipulation functions**: Some JavaScript engines have built-in string manipulation functions, such as `str.substr()` or `str.split()`, which might be faster or more efficient than the `substring` and `split` methods. Overall, the choice of approach depends on the specific requirements and constraints of the project, as well as personal preference and coding style.
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