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mybencmark11212224234
(version: 0)
Comparing performance of:
startswith vs indexof vs regex
Created:
2 years ago
by:
Guest
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Script Preparation code:
var url = "https://normalsozluk.com/b/normal-sozluk-yazarlarindan-ingilizce-mizah-paylasimlari--262427?page=40"; var match = "normalsozluk.com/yazar/"; var startswith = 0; var indexof = 0; var regex = 0;
Tests:
startswith
for (let i = 0; i < 10000; ++i) { if (url.startsWith(match)) { ++startswith; } }
indexof
for (let i = 0; i < 10000; ++i) { if (url.indexOf(match) != -1) { ++indexof; } }
regex
for (let i = 0; i < 10000; ++i) { if (/^https:\/\/normalsozluk\.com\/b\//.test(match)) { ++regex; } }
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (3)
Previous results
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Test case name
Result
startswith
indexof
regex
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 provided JSON data and explain what's being tested, compared, and other considerations. **Benchmark Definition** The benchmark definition is a set of instructions that describes how to run the test. It consists of: 1. **Script Preparation Code**: This code sets up variables used in the test: * `url`: the URL to be analyzed. * `match`: a substring to search for in the URL. * `startswith` and `indexof` counters are initialized to 0. * `regex` is not used explicitly, but it's implied by the use of the RegExp object later on. 2. **Html Preparation Code**: This code is empty, indicating that no HTML elements are being analyzed. The test script consists of three loops: 1. `startswith`: Iterates 10,000 times, checking if the URL starts with the `match` substring. If it does, increments the `startswith` counter. 2. `indexof`: Iterates 10,000 times, checking if the `match` substring is found in the URL using the `indexOf()` method. If it is, increments the `indexof` counter. 3. `regex`: Iterates 10,000 times, using a RegExp object to test if the URL starts with a specific pattern (`/^https:\\/\\/normalsozluk\\.com\\/b\\//`). If it does, increments the `regex` counter. **Comparison** The three tests compare different approaches to searching for the `match` substring in the `url`: 1. **`startswith`**: Checks if the URL starts with the exact match. 2. **`indexof`**: Finds the index of the first occurrence of the `match` substring in the URL using the `indexOf()` method. 3. **`regex`**: Uses a RegExp object to test if the URL matches a specific pattern. **Pros and Cons** Here's a brief summary of each approach: 1. **`startswith`**: * Pros: Fast and efficient, as it only checks if the URL starts with the match. * Cons: May not be accurate for URLs that start with a different substring or have multiple matches. 2. **`indexof`**: * Pros: More accurate than `startswith`, as it finds the first occurrence of the match. * Cons: May be slower due to the string search algorithm used by `indexOf()`. 3. **`regex`**: * Pros: Flexible and powerful, as it allows for complex pattern matching. * Cons: May be slower due to the RegExp object's overhead, and may not be suitable for all use cases. **Library and Special JS Features** 1. **RegExp**: The `regex` test uses a RegExp object to perform pattern matching. RegExp is a built-in JavaScript library that provides support for regular expressions. 2. No special JavaScript features are mentioned in the provided code. **Alternatives** Other approaches could be used to implement these tests, such as: * Using a dedicated string searching library or function (e.g., `strpos()` or `substr_count()`). * Implementing a custom algorithm for finding substrings or pattern matching. * Using a different programming language or framework that provides better support for string searching and pattern matching. However, the use of RegExp in this benchmark provides a good balance between performance and flexibility.
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