src/java.base/share/classes/sun/util/locale/provider/JRELocaleProviderAdapter.java

rev 59021 : 8244152: Remove unnecessary hash map resize in LocaleProviderAdapters
Reviewed-by: joehw, vtewari

*** 1,7 ****
  /*
!  * Copyright (c) 2012, 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
--- 1,7 ----
  /*
!  * Copyright (c) 2012, 2020, 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
*** 442,453 ****
      protected Set<String> createLanguageTagSet(String category) {
          String supportedLocaleString = createSupportedLocaleString(category);
          if (supportedLocaleString == null) {
              return Collections.emptySet();
          }
-         Set<String> tagset = new HashSet<>();
          StringTokenizer tokens = new StringTokenizer(supportedLocaleString);
          while (tokens.hasMoreTokens()) {
              tagset.add(tokens.nextToken());
          }
  
          return tagset;
--- 442,453 ----
      protected Set<String> createLanguageTagSet(String category) {
          String supportedLocaleString = createSupportedLocaleString(category);
          if (supportedLocaleString == null) {
              return Collections.emptySet();
          }
          StringTokenizer tokens = new StringTokenizer(supportedLocaleString);
+         Set<String> tagset = new HashSet<>(Math.max((int)(tokens.countTokens() / 0.75f) + 1, 16));
          while (tokens.hasMoreTokens()) {
              tagset.add(tokens.nextToken());
          }
  
          return tagset;