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not includes vs. not equal to
(version: 0)
Comparing performance of:
not includes vs not equal
Created:
4 years ago
by:
Guest
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Script Preparation code:
var list = [0,1,2,3,4]; var item = 7;
Tests:
not includes
!list.includes(6)
not equal
item !== 0 && item !== 1 && item !== 2 && item !== 3 && item !== 4
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
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Test case name
Result
not includes
not equal
Fastest:
N/A
Slowest:
N/A
Latest run results:
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the provided JSON and explain what's being tested, the options compared, their pros and cons, and other considerations. **Benchmark Definition** The benchmark definition is a simple JavaScript expression that checks if an item is included in a list or not equal to a set of values. The two expressions are: 1. `!list.includes(6)` - This expression checks if the number 6 is not included in the list `[0,1,2,3,4]`. 2. `item !== 0 && item !== 1 && item !== 2 && item !== 3 && item !== 4` - This expression checks if the value of `item` (which is initialized to `7`) is not equal to any of the values in the list `[0,1,2,3,4]`. **Options Compared** The two expressions are compared in terms of performance. The benchmark aims to determine which expression is faster. **Pros and Cons of Each Approach** 1. **`!list.includes(6)`** * Pros: + More concise and readable. + Uses the `includes()` method, which is a modern JavaScript feature that's widely supported. * Cons: + May be slower due to the use of the `includes()` method, which involves searching for the value in the list. 2. **`item !== 0 && item !== 1 && item !== 2 && item !== 3 && item !== 4`** * Pros: + Avoids using the `includes()` method and directly checks each value. * Cons: + More verbose and less readable. + May be slower due to the need to perform multiple comparisons. **Other Considerations** The benchmark doesn't consider other factors that might affect performance, such as: * The size of the list (`list`). * The type of `item` (number vs. string vs. object). * The browser and device platform used for execution. * Any potential caching or optimizations by the browser. **Library Used** None, this benchmark uses built-in JavaScript features only. **Special JS Feature/Syntax** The `includes()` method is a modern JavaScript feature introduced in ECMAScript 2015 (ES6). It's widely supported by most browsers and Node.js versions. The `!==` operator is also a part of the ECMAScript standard, but it's been available since ES5. **Alternatives** If you wanted to write a similar benchmark for other expressions, you could try: * `!Array.prototype.indexOf.call(list, 6)` (using the legacy `indexOf()` method) * `item !== 0 && item !== 1 && item !== 2 && item !== 3 && item !== 4` with different values (e.g., strings or objects) to test for equality. * Using a different data structure, like an object or a map, instead of an array.
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