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!! vs ||
(version: 0)
Comparing performance of:
!! vs ||
Created:
3 years ago
by:
Guest
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Tests:
!!
for(i=-100; i<100; i++){ console.log(!!i) }
||
for(i=-100; i<100; i++){ console.log(i || false) }
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
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Test case name
Result
!!
||
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 definition is not explicitly stated, but it appears to be comparing two different operators: `!!` (double exclamation) and `||` (logical OR). The description field is empty, suggesting that no additional context or purpose is intended for this benchmark. **Script Preparation Code** and **Html Preparation Code** Both fields are empty, which means that the test script does not require any specific preparation code. This implies that the focus is solely on comparing the performance of the two operators. **Individual Test Cases** There are two individual test cases: 1. `!!`: This test case uses the `!!` operator to convert a value to a boolean. The purpose of this operator is to negate the original value (i.e., convert it to false if it's true, and vice versa). In JavaScript, `!!` can also be used as a shorthand for `Boolean()` or `Boolean(value)`. 2. `||`: This test case uses the `||` operator to evaluate two expressions. If the first expression is truthy, the second expression is not evaluated. **Pros and Cons of Each Approach** * `!!` (double exclamation): + Pros: - Can be used as a shorthand for converting values to booleans. - May be faster due to its optimized implementation in some engines. + Cons: - Less readable code, as the intent is not immediately clear. - May cause unexpected behavior if not used carefully (e.g., `!!null` returns `true`, while `Boolean(null)` returns `false`) * `||` (logical OR): + Pros: - More readable code, as the intent is clearly expressed. - Can be used to short-circuit evaluations in conditional statements. + Cons: - May be slower due to its evaluated expression evaluation. **Library and Special JS Features** Neither of the test cases uses any libraries or special JavaScript features. The focus is solely on comparing the performance of the `!!` and `||` operators. **Other Alternatives** If you're looking for alternatives to these operators, consider using: * `Boolean()` or `Boolean(value)` to convert a value to a boolean. * Conditional statements (e.g., `if`, `switch`) instead of logical OR for conditional evaluations. Keep in mind that the choice of operator ultimately depends on the specific use case and personal preference.
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