change: disable dfc by default

Author: ishland

c2me-opts-dfc/src/main/java/com/ishland/c2me/opts/dfc/ModuleEntryPoint.java

@@ -1,7 +1,24 @@
 package com.ishland.c2me.opts.dfc;
 
+import com.ishland.c2me.base.common.config.ConfigSystem;
+
 public class ModuleEntryPoint {
 
-    private static final boolean enabled = true;
+    private static final boolean enabled = new ConfigSystem.ConfigAccessor()
+            .key("vanillaWorldGenOptimizations.useDensityFunctionCompiler")
+            .comment("""
+                    Whether to use density function compiler to accelerate world generation
+                    
+                    Density function: https://minecraft.wiki/w/Density_function
+                    
+                    This functionality compiles density functions from world generation
+                    datapacks (including vanilla generation) to JVM bytecode to increase
+                    performance by allowing JVM JIT to better optimize the code
+                    
+                    Currently, all functions provided by vanilla are implemented.
+                    Chunk upgrades from pre-1.18 versions are not implemented and will
+                    fall back to the unoptimized version of density functions.
+                    """)
+            .getBoolean(false, false);
 
 }