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&& vs ||
(version: 0)
Comparing performance of:
&& vs ||
Created:
4 years ago
by:
Guest
Jump to the latest result
Script Preparation code:
var a = 5, b = 4;
Tests:
&&
var c = a < 6 && b < 5
||
var d = a > 5 || b > 5
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
&&
||
Fastest:
N/A
Slowest:
N/A
Latest run results:
No previous run results
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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, compared, and the pros and cons of different approaches. **Benchmark Overview** The test measures the performance difference between two logical operators in JavaScript: `&&` (logical AND) and `||` (logical OR). The script defines three variables: `a`, `b`, and `c`, with values 5, 4, and an unknown value, respectively. The test cases evaluate expressions involving these variables. **Benchmark Definition JSON** The benchmark definition JSON contains two key pieces of information: 1. **Script Preparation Code**: This section is empty, which means the script doesn't perform any setup or initialization before running the test. 2. **Html Preparation Code**: Also empty, indicating that no HTML code needs to be executed before running the test. **Individual Test Cases** There are two test cases: 1. `&&` (Logical AND) * Benchmark Definition: `var c = a < 6 && b < 5` * Description: This expression will evaluate to true if both conditions are met, i.e., `a` is less than 6 and `b` is less than 5. 2. `||` (Logical OR) * Benchmark Definition: `var d = a > 5 || b > 5` * Description: This expression will evaluate to true if either condition is met, i.e., `a` is greater than 5 or `b` is greater than 5. **Library and Special JS Features** None are explicitly mentioned in the benchmark definition. However, it's worth noting that JavaScript engines might optimize certain expressions differently due to features like: * Short-circuit evaluation: Some engines may evaluate the second operand of a binary expression (e.g., `a < 6 && b`) only if the first operand is true. * Lazy evaluation: Engines might delay evaluating an expression until its value is actually needed. **Pros and Cons** Here's a brief comparison of the two operators: | Operator | Pros | Cons | | --- | --- | --- | | `&&` (Logical AND) | Can be more efficient for conditional checks, as it short-circuits evaluation if the first operand is false. | May lead to slower performance if both operands need to be evaluated. | | `||` (Logical OR) | Can be faster for expressions where at least one operand needs to be evaluated. | Can lead to slower performance if neither operand is needed, as it may still evaluate both. | **Latest Benchmark Results** The latest benchmark results show that: * `||` (Logical OR) is slightly faster than `&&` (Logical AND), with approximately 6278680 executions per second compared to 6263372. Keep in mind that these results are specific to Chrome 91 on a Windows desktop and may not be representative of other browsers, platforms, or scenarios. **Other Alternatives** If you're interested in testing other logical operators or expressions, you can explore the MeasureThat.net website and create new benchmarks. Some alternative options might include: * Testing other comparison operators (e.g., `===`, `!==`, `>`, `<`, etc.) * Evaluating arithmetic expressions * Comparing string concatenation vs. template literals * Assessing performance of different array methods (e.g., `push`, `splice`, `indexOf`, etc.)
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