Changes made to GlobalBlockQueue to help diagnose lag.

Core/src/main/java/com/github/intellectualsites/plotsquared/plot/util/block/GlobalBlockQueue.java

@@ -8,6 +8,7 @@ import java.util.ArrayList;
 import java.util.ConcurrentModificationException;
 import java.util.Iterator;
 import java.util.List;
+import java.util.Vector;
 import java.util.concurrent.ConcurrentLinkedDeque;
 import java.util.concurrent.atomic.AtomicBoolean;
 
@@ -38,8 +39,7 @@ public class GlobalBlockQueue {
                         }
                         return;
                     }
-                } while (((GlobalBlockQueue.this.secondLast = System.currentTimeMillis())
+                } while (((GlobalBlockQueue.this.secondLast = System.currentTimeMillis())- GlobalBlockQueue.this.last) < free);
-                    - GlobalBlockQueue.this.last) < free);
             }
         };
 
@@ -81,17 +81,16 @@ public class GlobalBlockQueue {
             return false;
         }
         running.set(true);
-        TaskManager.runTaskRepeat(() -> {
+        TaskManager.runTaskRepeat(new Runnable() {
+            @Override public void run() {
                 if (inactiveQueues.isEmpty() && activeQueues.isEmpty()) {
                     lastSuccess = System.currentTimeMillis();
-                tasks();
+                    GlobalBlockQueue.this.tasks();
                     return;
                 }
-            SET_TASK.value1 = 50 + Math.min(
+                SET_TASK.value1 = 50 + Math.min((50 + GlobalBlockQueue.this.last) - (GlobalBlockQueue.this.last = System.currentTimeMillis()),
-                (50 + GlobalBlockQueue.this.last) - (GlobalBlockQueue.this.last =
-                    System.currentTimeMillis()),
                     GlobalBlockQueue.this.secondLast - System.currentTimeMillis());
-            SET_TASK.value2 = getNextQueue();
+                SET_TASK.value2 = GlobalBlockQueue.this.getNextQueue();
                 if (SET_TASK.value2 == null) {
                     return;
                 }
@@ -126,6 +125,7 @@ public class GlobalBlockQueue {
                     // Enable it again (note that we are still on the main thread)
                     SET_TASK.value2.endSet(true);
                 }
+            }
         }, 1);
         return true;
     }
@@ -205,7 +205,9 @@ public class GlobalBlockQueue {
             } else {
                 ArrayList<Thread> threads = new ArrayList<>();
                 for (int i = 0; i < PARALLEL_THREADS; i++) {
-                    threads.add(new Thread(SET_TASK));
+                    Thread thread = new Thread(SET_TASK);
+                    thread.setName("PlotSquared Flush Task");
+                    threads.add(thread);
                 }
                 for (Thread thread : threads) {
                     thread.start();