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Contains
(version: 1)
Comparing performance of:
indexOf vs Match
Created:
9 years ago
by:
Registered User
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Script Preparation code:
var myString = 'titles[].id';
Tests:
indexOf
myString.indexOf('[].') > -1;
Match
myString.match(/([A-Z]+)\[]\.([A-Z]+)/i);
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
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Test case name
Result
indexOf
Match
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the provided benchmark and explain what's being tested. **Benchmark Definition** The benchmark is defined by two scripts: 1. `var myString = 'titles[].id';` - This script creates a string variable `myString` with a value that contains an array index (`[]`) followed by a dot (`.`) and another array index. The purpose of this script is to provide a base string for the benchmark tests. 2. No HTML preparation code is provided, which means the benchmark doesn't require any HTML setup or initialization. **Individual Test Cases** There are two test cases: 1. `myString.indexOf('[].') > -1;` - This test case checks if the string `myString` contains a specific substring (`'[.]'`) anywhere within it. The `indexOf()` method is used to search for this substring and return its index. 2. `myString.match(/([A-Z]+)\\[]\\.([A-Z]+)/i);` - This test case uses a regular expression to match the string `myString`. The regex pattern `/([A-Z]+)\\[]\\.([A-Z]+)/i` is used to extract a specific substring from the string. The `match()` method returns an array containing the matched strings. **Options Compared** In this benchmark, two different approaches are compared: 1. **indexOf()**: This method checks if the string contains a specific substring and returns its index. If the substring is not found, it returns -1. 2. **Regular Expressions (Match)**: This approach uses a regex pattern to extract a specific substring from the string. **Pros and Cons** Here's a brief summary of the pros and cons of each approach: * **indexOf()**: + Pros: - Simple and straightforward - Fast, as it only requires a single pass through the string + Cons: - May not be suitable for complex substring matching or regex patterns - Can return -1 if the substring is not found, which might be considered an error * **Regular Expressions (Match)**: + Pros: - Flexible and powerful for complex substring matching and regex patterns - Can return multiple matches as an array + Cons: - Slower than indexOf() due to the additional complexity of the regex engine - May require more memory to process large strings **Library Usage** In this benchmark, the following library is used: * None explicitly. However, the `String.prototype.indexOf()` method and regular expressions are built-in JavaScript features. **Special JS Features/Syntax** No special JavaScript features or syntax are mentioned in the benchmark definition. The tests use standard JavaScript methods and regex patterns. **Other Alternatives** If you wanted to compare other approaches for substring matching, some alternatives could be: * `String.prototype.includes()`: A more modern alternative to `indexOf()` that returns a boolean indicating whether the string includes the specified substring. * `RegExp.exec()`: Another way to use regular expressions to match strings, which can return multiple matches as an array. * `substr()` or `substring()`: String methods that allow you to extract substrings from the original string. Keep in mind that each approach has its own trade-offs and use cases. The choice of which one to use depends on the specific requirements of your project.
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