Index: src/java/org/apache/lucene/analysis/tokenattributes/CharTermAttributeImpl.java
===================================================================
--- src/java/org/apache/lucene/analysis/tokenattributes/CharTermAttributeImpl.java	(revision 966945)
+++ src/java/org/apache/lucene/analysis/tokenattributes/CharTermAttributeImpl.java	(working copy)
@@ -245,8 +245,18 @@
   public Object clone() {
     CharTermAttributeImpl t = (CharTermAttributeImpl)super.clone();
     // Do a deep clone
-    t.termBuffer = termBuffer.clone();
+   
+    if (this.termBuffer.length >= 150 && this.termBuffer.length*0.75 <= this.termLength) {
+      t.termBuffer = termBuffer.clone();
+      
+    } else {
+      t.termBuffer = new char[this.termLength];
+      System.arraycopy(this.termBuffer, 0, t.termBuffer, 0, this.termLength);
+      
+    }
+    
     return t;
+    
   }
   
   @Override