Performance overhaul sponsored by rockxz3, using his large server's data for reference to help with testing and tuning. Timing numbers below are based on this data set.

* PlayerMoveEvent performance boost (from 0.047ms to 0.015ms in testing, ~313% as fast): now more thrifty in determining whether player has actually moved between chunks before doing anything else; important since this event triggers extremely quickly
* PlayerInteractEvent performance boost (from 0.068ms to 0.034ms in testing, ~200% as fast): now ignores left-clicks for interaction checks, since in CraftBukkit 1.4 left-clicks no longer open doors or activate buttons/levers/etc.; not as important as above, but still triggers quite often as people are digging or interacting with blocks
* "/f list" command performance boost (from 234ms to 30ms in testing, ~780% as fast): code was getting information for all factions, narrowed it down to only getting info for displayed page range
* "/f show" command performance boost (from 132ms to 28ms in testing, ~470% as fast): tweaked the ally & enemy listing code used

src/com/massivecraft/factions/FPlayer.java

@@ -572,7 +572,7 @@ public class FPlayer extends PlayerEntity implements EconomyParticipator
 		{
 			return;
 		}
-		Faction factionHere = Board.getFactionAt(new FLocation(this));
+		Faction factionHere = Board.getFactionAt(this.getLastStoodAt());
 		String msg = P.p.txt.parse("<i>")+" ~ "+factionHere.getTag(this);
 		if (factionHere.getDescription().length() > 0)
 		{

src/com/massivecraft/factions/cmd/CmdList.java

@@ -71,6 +71,8 @@ public class CmdList extends FCommand
 		});
 		
 		ArrayList<String> lines = new ArrayList<String>();
+
+/*		// this code was really slow on large servers, getting full info for every faction and then only showing 9 of them; rewritten below
 		lines.add(p.txt.parse("<i>Factionless<i> %d online", Factions.i.getNone().getFPlayersWhereOnline(true).size()));
 		for (Faction faction : factionList)
 		{
@@ -85,6 +87,37 @@ public class CmdList extends FCommand
 		}
 		
 		sendMessage(p.txt.getPage(lines, this.argAsInt(0, 1), "Faction List"));
-	}
+ */
 
+		factionList.add(0, Factions.i.getNone());
+
+		final int pageheight = 9;
+		int pagenumber = this.argAsInt(0, 1);
+		int pagecount = (factionList.size() / pageheight) + 1;
+		int start = (pagenumber - 1) * pageheight;
+		int end = start + pageheight;
+		if (end > factionList.size())
+			end = factionList.size();
+
+		lines.add(p.txt.titleize("Faction List "+pagenumber+"/"+pagecount));
+
+		for (Faction faction : factionList.subList(start, end))
+		{
+			if (faction.isNone())
+			{
+				lines.add(p.txt.parse("<i>Factionless<i> %d online", Factions.i.getNone().getFPlayersWhereOnline(true).size()));
+				continue;
+			}
+			lines.add(p.txt.parse("%s<i> %d/%d online, %d/%d/%d",
+				faction.getTag(fme),
+				faction.getFPlayersWhereOnline(true).size(),
+				faction.getFPlayers().size(),
+				faction.getLandRounded(),
+				faction.getPowerRounded(),
+				faction.getPowerMaxRounded())
+			);
+		}
+
+		sendMessage(lines);
+	}
 }

src/com/massivecraft/factions/cmd/CmdShow.java

@@ -9,6 +9,7 @@ import com.massivecraft.factions.Faction;
 import com.massivecraft.factions.Factions;
 import com.massivecraft.factions.struct.Permission;
 import com.massivecraft.factions.struct.Role;
+import com.massivecraft.factions.struct.Relation;
 
 public class CmdShow extends FCommand
 {
@@ -96,28 +97,21 @@ public class CmdShow extends FCommand
 		String enemyList = p.txt.parse("<a>Enemies: ");
 		for (Faction otherFaction : Factions.i.get())
 		{
-			if (otherFaction == faction)
+			if (otherFaction == faction) continue;
-			{
+
-				continue;
+			Relation rel = otherFaction.getRelationTo(faction);
-			}
+			if ( ! rel.isAlly() && ! rel.isEnemy()) continue;  // if not ally or enemy, drop out now so we're not wasting time on it; good performance boost
+
 			listpart = otherFaction.getTag(fme)+p.txt.parse("<i>")+", ";
-			if (otherFaction.getRelationTo(faction).isAlly())
+			if (rel.isAlly())
-			{
 				allyList += listpart;
-			}
+			else if (rel.isEnemy())
-			else if (otherFaction.getRelationTo(faction).isEnemy())
-			{
 				enemyList += listpart;
-			}
 		}
 		if (allyList.endsWith(", "))
-		{
 			allyList = allyList.substring(0, allyList.length()-2);
-		}
 		if (enemyList.endsWith(", "))
-		{
 			enemyList = enemyList.substring(0, enemyList.length()-2);
-		}
 		
 		sendMessage(allyList);
 		sendMessage(enemyList);

src/com/massivecraft/factions/integration/SpoutMainListener.java

@@ -65,7 +65,7 @@ public class SpoutMainListener implements Listener
 		if (!sPlayer.isSpoutCraftEnabled() || (Conf.spoutTerritoryDisplaySize <= 0 && ! Conf.spoutTerritoryNoticeShow))
 			return;
 
-		FLocation here = new FLocation(player);
+		FLocation here = player.getLastStoodAt();
 		Faction factionHere = Board.getFactionAt(here);
 
 		doOwnerList(player, sPlayer, here, factionHere);
@@ -83,7 +83,7 @@ public class SpoutMainListener implements Listener
 
 	private void doLabels(FPlayer player, SpoutPlayer sPlayer, boolean notify)
 	{
-		FLocation here = new FLocation(player);
+		FLocation here = player.getLastStoodAt();
 		Faction factionHere = Board.getFactionAt(here);
 		String tag = factionHere.getColorTo(player).toString() + factionHere.getTag();
 

src/com/massivecraft/factions/listeners/FactionsPlayerListener.java

@@ -54,11 +54,10 @@ public class FactionsPlayerListener implements Listener
 		// Update the lastLoginTime for this fplayer
 		me.setLastLoginTime(System.currentTimeMillis());
 
-/*		This is now done in a separate task which runs every few minutes
+		// Store player's current FLocation and notify them where they are
-		// Run the member auto kick routine. Twice to get to the admins...
+		me.setLastStoodAt(new FLocation(event.getPlayer().getLocation()));
-		FPlayers.i.autoLeaveOnInactivityRoutine();
+		if ( ! SpoutFeatures.updateTerritoryDisplay(me))
-		FPlayers.i.autoLeaveOnInactivityRoutine();
+			me.sendFactionHereMessage();
- */
 
 		SpoutFeatures.updateAppearancesShortly(event.getPlayer());
 	}
@@ -81,15 +80,28 @@ public class FactionsPlayerListener implements Listener
 		SpoutFeatures.playerDisconnect(me);
 	}
 	
-	@EventHandler(priority = EventPriority.NORMAL)
+	@EventHandler(priority = EventPriority.MONITOR)
 	public void onPlayerMove(PlayerMoveEvent event)
 	{
+		if (event.isCancelled()) return;
+
+		// quick check to make sure player is moving between chunks; good performance boost
+		if
+		(
+			event.getFrom().getBlockX() >> 4 == event.getTo().getBlockX() >> 4
+			&&
+			event.getFrom().getBlockZ() >> 4 == event.getTo().getBlockZ() >> 4
+			&&
+			event.getFrom().getWorld() == event.getTo().getWorld()
+		)
+			return;
+
 		Player player = event.getPlayer();
 		FPlayer me = FPlayers.i.get(player);
 		
 		// Did we change coord?
 		FLocation from = me.getLastStoodAt();
-		FLocation to = new FLocation(player.getLocation());
+		FLocation to = new FLocation(event.getTo());
 		
 		if (from.equals(to))
 		{
@@ -172,7 +184,7 @@ public class FactionsPlayerListener implements Listener
 		
 		if (me.getAutoClaimFor() != null)
 		{
-			me.attemptClaim(me.getAutoClaimFor(), player.getLocation(), true);
+			me.attemptClaim(me.getAutoClaimFor(), event.getTo(), true);
 		}
 		else if (me.isAutoSafeClaimEnabled())
 		{
@@ -182,11 +194,9 @@ public class FactionsPlayerListener implements Listener
 			}
 			else
 			{
-				FLocation playerFlocation = new FLocation(me);
+				if (!Board.getFactionAt(to).isSafeZone())
-
-				if (!Board.getFactionAt(playerFlocation).isSafeZone())
 				{
-					Board.setFactionAt(Factions.i.getSafeZone(), playerFlocation);
+					Board.setFactionAt(Factions.i.getSafeZone(), to);
 					me.msg("<i>This land is now a safe zone.");
 				}
 			}
@@ -199,11 +209,9 @@ public class FactionsPlayerListener implements Listener
 			}
 			else
 			{
-				FLocation playerFlocation = new FLocation(me);
+				if (!Board.getFactionAt(to).isWarZone())
-
-				if (!Board.getFactionAt(playerFlocation).isWarZone())
 				{
-					Board.setFactionAt(Factions.i.getWarZone(), playerFlocation);
+					Board.setFactionAt(Factions.i.getWarZone(), to);
 					me.msg("<i>This land is now a war zone.");
 				}
 			}
@@ -214,14 +222,12 @@ public class FactionsPlayerListener implements Listener
 	public void onPlayerInteract(PlayerInteractEvent event)
 	{
 		if (event.isCancelled()) return;
+		if (event.getAction() != Action.RIGHT_CLICK_BLOCK) return;  // only interested in right-clicks as of MC 1.4+; good performance boost
 
 		Block block = event.getClickedBlock();
 		Player player = event.getPlayer();
 
-		if (block == null)
+		if (block == null) return;  // clicked in air, apparently
-		{
-			return;  // clicked in air, apparently
-		}
 
 		if ( ! canPlayerUseBlock(player, block, false))
 		{
@@ -246,11 +252,6 @@ public class FactionsPlayerListener implements Listener
 			return;
 		}
 
-		if (event.getAction() != Action.RIGHT_CLICK_BLOCK)
-		{
-			return;  // only interested on right-clicks for below
-		}
-
 		if ( ! playerCanUseItemHere(player, block.getLocation(), event.getMaterial(), false))
 		{
 			event.setCancelled(true);