src/java.base/share/classes/java/lang/Class.java

rev 49518 : [mq]: 8200696-Optimal-initial-capacity-of-java-lang-Class-enumConstantDirectory

*** 1,7 ****
  /*
!  * Copyright (c) 1994, 2017, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.  Oracle designates this
--- 1,7 ----
  /*
!  * Copyright (c) 1994, 2018, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.  Oracle designates this
*** 3527,3537 ****
          if (directory == null) {
              T[] universe = getEnumConstantsShared();
              if (universe == null)
                  throw new IllegalArgumentException(
                      getName() + " is not an enum type");
!             directory = new HashMap<>(2 * universe.length);
              for (T constant : universe) {
                  directory.put(((Enum<?>)constant).name(), constant);
              }
              enumConstantDirectory = directory;
          }
--- 3527,3537 ----
          if (directory == null) {
              T[] universe = getEnumConstantsShared();
              if (universe == null)
                  throw new IllegalArgumentException(
                      getName() + " is not an enum type");
!             directory = new HashMap<>((int)(universe.length / 0.75f + 1.0f));
              for (T constant : universe) {
                  directory.put(((Enum<?>)constant).name(), constant);
              }
              enumConstantDirectory = directory;
          }