PaperMC/Spigot-Server-Patches/Remove-the-Vanilla-Method-Profiler.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Sat, 21 Jan 2017 08:00:33 +0100
Subject: [PATCH] Remove the Vanilla Method Profiler

Spigot rebrought this back after it was removed for years due to the performance hit.

It is unknown if the JIT will optimize it out as efficiently with how it was
added, so we do not want any risk of performance degredation.

Paper has a proper Timings system that makes the Vanilla Method profiler obsolete and inferior.

diff --git a/src/main/java/net/minecraft/server/CommandDebug.java b/src/main/java/net/minecraft/server/CommandDebug.java
index 89708da96..7586168db 100644
--- a/src/main/java/net/minecraft/server/CommandDebug.java
+++ b/src/main/java/net/minecraft/server/CommandDebug.java
@@ -0,0 +0,0 @@ public class CommandDebug extends CommandAbstract {
 
     public void execute(MinecraftServer minecraftserver, ICommandListener icommandlistener, String[] astring) throws CommandException {
         // CraftBukkit start - only allow use when enabled (so that no blank profile results occur)
-        if (!minecraftserver.methodProfiler.ENABLED) {
-            icommandlistener.sendMessage(new ChatComponentText("Vanilla debug profiling is disabled."));
-            icommandlistener.sendMessage(new ChatComponentText("To enable, restart the server with `-DenableDebugMethodProfiler=true' before `-jar'."));
-            icommandlistener.sendMessage(new ChatComponentText("Use `/timings' for plugin timings."));
+        if (true) { // Paper
+            icommandlistener.sendMessage(new ChatComponentText("Use `/timings report'")); // Paper
             return;
         }
+        /*
         // CraftBukkit end
         if (astring.length < 1) {
             throw new ExceptionUsage("commands.debug.usage", new Object[0]);
@@ -0,0 +0,0 @@ public class CommandDebug extends CommandAbstract {
             return astring[(int) (System.nanoTime() % (long) astring.length)];
         } catch (Throwable throwable) {
             return "Witty comment unavailable :(";
-        }
+        }*/ // Paper
     }
 
     public List<String> tabComplete(MinecraftServer minecraftserver, ICommandListener icommandlistener, String[] astring, @Nullable BlockPosition blockposition) {
diff --git a/src/main/java/net/minecraft/server/MethodProfiler.java b/src/main/java/net/minecraft/server/MethodProfiler.java
index 480e2ca97..a76d50723 100644
--- a/src/main/java/net/minecraft/server/MethodProfiler.java
+++ b/src/main/java/net/minecraft/server/MethodProfiler.java
@@ -0,0 +0,0 @@ import java.util.function.Supplier;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 
+// Paper - Remove this system - we have a more efficient Timings system
 public class MethodProfiler {
+    public boolean a;
+
+    MethodProfiler() {}
+
+    public final void a() {}
+
+    public final void a(String s) {}
+
+    public void a(Supplier<String> supplier) {}
+
+    public final void b() {}
+
+    public List<MethodProfiler.ProfilerInfo> b(String s) {
+        return Collections.emptyList();
+    }
+
+    public final void c(String s) {}
+
+    public final String c() {
+        return "[DISABLED]";
+    }
+/*
+class MethodProfiler {
 
     public static final boolean ENABLED = Boolean.getBoolean("enableDebugMethodProfiler"); // CraftBukkit - disable unless specified in JVM arguments
     private static final Logger b = LogManager.getLogger();
@@ -0,0 +0,0 @@ public class MethodProfiler {
         if (!ENABLED) return "[DISABLED]";  // CraftBukkit
         return this.c.isEmpty() ? "[UNKNOWN]" : (String) this.c.get(this.c.size() - 1);
     }
+*/
 
     public static final class ProfilerInfo implements Comparable<MethodProfiler.ProfilerInfo> {
 
--