diff --git a/src/org/joni/exception/JOniException.java b/src/org/joni/exception/JOniException.java
index c2c5d47..cd70df8 100644
--- a/src/org/joni/exception/JOniException.java
+++ b/src/org/joni/exception/JOniException.java
@@ -25,4 +25,12 @@ public class JOniException extends RuntimeException{
     public JOniException(String message) {
         super(message);
     }
+
+    // The stacktrace is not very useful and is very expensive,
+    // for example for Regexp#to_s on a Regexp like /(?i:a)|(?i:b)/
+    @SuppressWarnings("sync-override")
+    @Override
+    public final Throwable fillInStackTrace() {
+        return this;
+    }
 }