Added the ability to enable or disable the background compiler.

ProtocolLib/src/main/java/com/comphenix/protocol/ProtocolConfig.java

@@ -18,6 +18,8 @@ class ProtocolConfig {
 	
 	private static final String METRICS_ENABLED = "metrics";
 	
+	private static final String BACKGROUND_COMPILER_ENABLED = "background compiler";
+	
 	private static final String UPDATER_NOTIFY = "notify";
 	private static final String UPDATER_DOWNLAD = "download";
 	private static final String UPDATER_DELAY = "delay";
@@ -166,6 +168,25 @@ class ProtocolConfig {
 		global.set(METRICS_ENABLED, enabled);
 	}
 	
+	/**
+	 * Retrieve whether or not the background compiler for structure modifiers is enabled or not.
+	 * @return TRUE if it is enabled, FALSE otherwise.
+	 */
+	public boolean isBackgroundCompilerEnabled() {
+		return global.getBoolean(BACKGROUND_COMPILER_ENABLED, true);
+	}
+	
+	/**
+	 * Set whether or not the background compiler for structure modifiers is enabled or not.
+	 * <p>
+	 * This setting will take effect next time ProtocolLib is started.
+	 * 
+	 * @param enabled - TRUE if is enabled/running, FALSE otherwise.
+	 */
+	public void setBackgroundCompilerEnabled(boolean enabled) {
+		global.set(BACKGROUND_COMPILER_ENABLED, enabled);
+	}
+	
 	/**
 	 * Set the last time we updated, in seconds since 1970.01.01 00:00.
 	 * @param lastTimeSeconds - new last update time.

ProtocolLib/src/main/java/com/comphenix/protocol/ProtocolLibrary.java

@@ -166,7 +166,7 @@ public class ProtocolLibrary extends JavaPlugin {
 				return;
 			
 			// Initialize background compiler
-			if (backgroundCompiler == null) {
+			if (backgroundCompiler == null && config.isBackgroundCompilerEnabled()) {
 				backgroundCompiler = new BackgroundCompiler(getClassLoader());
 				BackgroundCompiler.setInstance(backgroundCompiler);
 			}

ProtocolLib/src/main/resources/config.yml

@@ -10,3 +10,6 @@ global:
     last: 0
  
   metrics: true
+  
+  # Automatically compile structure modifiers 
+  background compiler: true