Java 17 EnumSet performance issue when checking membership in large sets
Does anyone know how to After trying multiple solutions online, I still can't figure this out... I'm facing a performance issue when checking membership in a large `EnumSet`. I'm using Java 17 and I have a scenario where I need to frequently check if a certain enum value is present in a predefined `EnumSet`. The `EnumSet` can contain a significant number of elements, and I've noticed that the membership check is taking longer than expected. Here’s a snippet of my code: ```java import java.util.EnumSet; public class EnumSetExample { public enum Color { RED, GREEN, BLUE, YELLOW, ORANGE, PURPLE } public static void main(String[] args) { EnumSet<Color> colorSet = EnumSet.of(Color.RED, Color.GREEN, Color.BLUE, Color.YELLOW, Color.ORANGE, Color.PURPLE); long startTime = System.nanoTime(); for (int i = 0; i < 100000; i++) { boolean contains = colorSet.contains(Color.GREEN); } long duration = System.nanoTime() - startTime; System.out.println("Time taken for membership check: " + duration + " ns"); } } ``` When I run this code, the output shows a surprisingly high duration for the membership check, often exceeding 1000 ns for each check. While `EnumSet` is supposed to be efficient, I’m wondering if there’s a better way to handle this scenario or if I’m missing something in my implementation. I've also tried using a regular `HashSet` as a comparison, and while it performs better, I would prefer to stick with `EnumSet` for type safety and semantic clarity. Are there any best practices or optimization techniques for working with `EnumSet` in such situations? Is there a limit to its performance as the size of the set grows, or am I simply using it incorrectly? Am I approaching this the right way? I'd be grateful for any help.