src/java.base/share/classes/jdk/internal/org/objectweb/asm/signature/SignatureWriter.java

@@ -67,13 +67,13 @@
  * @author Eric Bruneton
  */
 public class SignatureWriter extends SignatureVisitor {
 
     /**
-     * Buffer used to construct the signature.
+     * Builder used to construct the signature.
      */
-    private final StringBuffer buf = new StringBuffer();
+    private final StringBuilder buf = new StringBuilder();
 
     /**
      * Indicates if the signature contains formal type parameters.
      */
     private boolean hasFormals;