perf[executor]: use & bits operation to improve performance

event/src/main/java/com/zfoo/event/manager/EventBus.java

@@ -22,6 +22,7 @@ import com.zfoo.protocol.util.RandomUtils;
 import com.zfoo.protocol.util.StringUtils;
 import com.zfoo.protocol.util.ThreadUtils;
 import io.netty.util.concurrent.FastThreadLocalThread;
+import io.netty.util.internal.MathUtil;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -46,7 +47,8 @@ public abstract class EventBus {
      * EN: The size of the thread pool. Event's thread pool is often used to do time-consuming operations, so set it a little bigger
      * CN: 线程池的大小. event的线程池经常用来做一些耗时的操作，所以要设置大一点
      */
-    private static final int EXECUTORS_SIZE = Math.max(Runtime.getRuntime().availableProcessors(), 4) * 2 + 1;
+    public static final int EXECUTORS_SIZE = MathUtil.safeFindNextPositivePowerOfTwo(Math.max(Runtime.getRuntime().availableProcessors(), 4) * 2);
+    private static final int EXECUTOR_MASK = EXECUTORS_SIZE - 1;
 
     private static final ExecutorService[] executors = new ExecutorService[EXECUTORS_SIZE];
 
@@ -144,8 +146,8 @@ public abstract class EventBus {
         executorOf(hash).execute(ThreadUtils.safeRunnable(runnable));
     }
 
-    public static ExecutorService executorOf(int hash){
-        return executors[Math.abs(hash % EXECUTORS_SIZE)];
+    public static ExecutorService executorOf(int hash) {
+        return executors[hash & EXECUTOR_MASK];
     }
 
     /**