diff --git a/src/net/sourceforge/plantuml/annotation/DeadCode.java b/src/net/sourceforge/plantuml/annotation/DeadCode.java
new file mode 100644
index 000000000..97f5a8e4c
--- /dev/null
+++ b/src/net/sourceforge/plantuml/annotation/DeadCode.java
@@ -0,0 +1,13 @@
+package net.sourceforge.plantuml.annotation;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+@Retention(RetentionPolicy.SOURCE)
+@Target({ ElementType.CONSTRUCTOR, ElementType.METHOD, ElementType.TYPE })
+public @interface DeadCode {
+	
+	String comment() default "";
+}
diff --git a/src/net/sourceforge/plantuml/code/Tokens.java b/src/net/sourceforge/plantuml/code/Tokens.java
index 8d034b945..57d3bcbe9 100644
--- a/src/net/sourceforge/plantuml/code/Tokens.java
+++ b/src/net/sourceforge/plantuml/code/Tokens.java
@@ -40,6 +40,9 @@ import java.util.List;
 import java.util.Set;
 import java.util.TreeSet;
 
+import net.sourceforge.plantuml.annotation.DeadCode;
+
+@DeadCode(comment = "try for text diagram compression")
 public class Tokens {
 	// ::remove file when __CORE__
 
diff --git a/src/net/sourceforge/plantuml/syntax/SyntaxChecker.java b/src/net/sourceforge/plantuml/syntax/SyntaxChecker.java
index 7a343dce9..ef1eaca31 100644
--- a/src/net/sourceforge/plantuml/syntax/SyntaxChecker.java
+++ b/src/net/sourceforge/plantuml/syntax/SyntaxChecker.java
@@ -43,6 +43,7 @@ import net.sourceforge.plantuml.ErrorUml;
 import net.sourceforge.plantuml.OptionFlags;
 import net.sourceforge.plantuml.SourceStringReader;
 import net.sourceforge.plantuml.UmlDiagram;
+import net.sourceforge.plantuml.annotation.DeadCode;
 import net.sourceforge.plantuml.core.Diagram;
 import net.sourceforge.plantuml.error.PSystemError;
 import net.sourceforge.plantuml.preproc.Defines;
@@ -50,8 +51,9 @@ import net.sourceforge.plantuml.text.BackSlash;
 import net.sourceforge.plantuml.utils.LineLocation;
 import net.sourceforge.plantuml.utils.LineLocationImpl;
 
+@DeadCode(comment = "used too much CPU")
 public class SyntaxChecker {
-    // ::remove folder when __HAXE__
+	// ::remove folder when __HAXE__
 	// ::remove file when __CORE__
 
 	public static SyntaxResult checkSyntax(List<String> source) {