Optimize entity AI goal selector

Remove redundant ArrayList to avoid excessive object creation and CPU
overhead, the entries are added to the list then immediately iterated through
to run so just run them directly.

Swap order of some conditionals to perform the more efficient check first
as if it fails the list lookup will not be executed.

Remove profiling hooks including some rather expensive calls to getSimpleName.

src/main/java/net/minecraft/server/EntityLiving.java

@@ -470,7 +470,7 @@ public abstract class EntityLiving extends Entity {
         }
 
         this.av += (f3 - this.av) * 0.3F;
-        this.world.methodProfiler.a("headTurn");
+        // this.world.methodProfiler.a("headTurn"); // CraftBukkit - not in production code
         if (this.aV()) {
             this.senses.a();
         } else {
@@ -498,8 +498,8 @@ public abstract class EntityLiving extends Entity {
             }
         }
 
-        this.world.methodProfiler.b();
+        // this.world.methodProfiler.b(); // CraftBukkit - not in production code
-        this.world.methodProfiler.a("rangeChecks");
+        // this.world.methodProfiler.a("rangeChecks"); // CraftBukkit - not in production code
 
         while (this.yaw - this.lastYaw < -180.0F) {
             this.lastYaw -= 360.0F;
@@ -533,7 +533,7 @@ public abstract class EntityLiving extends Entity {
             this.at += 360.0F;
         }
 
-        this.world.methodProfiler.b();
+        // this.world.methodProfiler.b(); // CraftBukkit - not in production code
         this.aw += f2;
     }
 

src/main/java/net/minecraft/server/PathfinderGoalSelector.java

@@ -25,7 +25,7 @@ public class PathfinderGoalSelector {
     }
 
     public void a() {
-        UnsafeList arraylist = new UnsafeList(); // CraftBukkit - ArrayList -> UnsafeList
+        // ArrayList arraylist = new ArrayList(); // CraftBukkit - remove usage
         Iterator iterator;
         PathfinderGoalSelectorItem pathfindergoalselectoritem;
 
@@ -46,7 +46,10 @@ public class PathfinderGoalSelector {
                 }
 
                 if (this.b(pathfindergoalselectoritem) && pathfindergoalselectoritem.a.a()) {
-                    arraylist.add(pathfindergoalselectoritem);
+                    // CraftBukkit start - call method now instead of queueing
+                    // arraylist.add(pathfindergoalselectoritem);
+                    pathfindergoalselectoritem.a.e();
+                    // CraftBukkit end
                     this.b.add(pathfindergoalselectoritem);
                 }
             }
@@ -62,40 +65,42 @@ public class PathfinderGoalSelector {
             }
         }
 
-        this.c.a("goalStart");
+        // this.c.a("goalStart"); // CraftBukkit - not in production code
-        iterator = arraylist.iterator();
+        // CraftBukkit start - removed usage of arraylist
+        /*iterator = arraylist.iterator();
 
         while (iterator.hasNext()) {
             pathfindergoalselectoritem = (PathfinderGoalSelectorItem) iterator.next();
-            this.c.a(pathfindergoalselectoritem.a.getClass().getSimpleName());
+            // this.c.a(pathfindergoalselectoritem.a.getClass().getSimpleName()); // CraftBukkit - not in production code
             pathfindergoalselectoritem.a.e();
-            this.c.b();
+            // this.c.b(); // CraftBukkit - not in production code
-        }
+        }*/
+        // CraftBukkit end
 
-        this.c.b();
+        // this.c.b(); // CraftBukkit - not in production code
-        this.c.a("goalTick");
+        // this.c.a("goalTick"); // CraftBukkit - not in production code
         iterator = this.b.iterator();
 
         while (iterator.hasNext()) {
             pathfindergoalselectoritem = (PathfinderGoalSelectorItem) iterator.next();
-            this.c.a(pathfindergoalselectoritem.a.getClass().getSimpleName());
+            // this.c.a(pathfindergoalselectoritem.a.getClass().getSimpleName()); // CraftBukkit - not in production code
             pathfindergoalselectoritem.a.d();
-            this.c.b();
+            // this.c.b(); // CraftBukkit - not in production code
         }
 
-        this.c.b();
+        // this.c.b(); // CraftBukkit - not in production code
     }
 
     private boolean a(PathfinderGoalSelectorItem pathfindergoalselectoritem) {
-        this.c.a("canContinue");
+        // this.c.a("canContinue"); // CraftBukkit - not in production code
         boolean flag = pathfindergoalselectoritem.a.b();
 
-        this.c.b();
+        // this.c.b(); // CraftBukkit - not in production code
         return flag;
     }
 
     private boolean b(PathfinderGoalSelectorItem pathfindergoalselectoritem) {
-        this.c.a("canUse");
+        // this.c.a("canUse"); // CraftBukkit - not in production code
         Iterator iterator = this.a.iterator();
 
         while (iterator.hasNext()) {
@@ -103,18 +108,20 @@ public class PathfinderGoalSelector {
 
             if (pathfindergoalselectoritem1 != pathfindergoalselectoritem) {
                 if (pathfindergoalselectoritem.b >= pathfindergoalselectoritem1.b) {
-                    if (this.b.contains(pathfindergoalselectoritem1) && !this.a(pathfindergoalselectoritem, pathfindergoalselectoritem1)) {
+                    // CraftBukkit - switch order
-                        this.c.b();
+                    if (!this.a(pathfindergoalselectoritem, pathfindergoalselectoritem1) && this.b.contains(pathfindergoalselectoritem1)) {
+                        // this.c.b(); // CraftBukkit - not in production code
                         return false;
                     }
-                } else if (this.b.contains(pathfindergoalselectoritem1) && !pathfindergoalselectoritem1.a.g()) {
+                // CraftBukkit - switch order
-                    this.c.b();
+                } else if (!pathfindergoalselectoritem1.a.g() && this.b.contains(pathfindergoalselectoritem1)) {
+                    // this.c.b(); // CraftBukkit - not in production code
                     return false;
                 }
             }
         }
 
-        this.c.b();
+        // this.c.b(); // CraftBukkit - not in production code
         return true;
     }