src/java.base/share/classes/java/util/WeakHashMap.java

rev 51180 : [mq]: 8207314-Unnecessary-reallocation-when-constructing-WeakHashMap-from-a-large-Map

*** 250,260 ****
       * @param   m the map whose mappings are to be placed in this map
       * @throws  NullPointerException if the specified map is null
       * @since   1.3
       */
      public WeakHashMap(Map<? extends K, ? extends V> m) {
!         this(Math.max((int) (m.size() / DEFAULT_LOAD_FACTOR) + 1,
                  DEFAULT_INITIAL_CAPACITY),
               DEFAULT_LOAD_FACTOR);
          putAll(m);
      }
  
--- 250,260 ----
       * @param   m the map whose mappings are to be placed in this map
       * @throws  NullPointerException if the specified map is null
       * @since   1.3
       */
      public WeakHashMap(Map<? extends K, ? extends V> m) {
!         this(Math.max((int) ((float)m.size() / DEFAULT_LOAD_FACTOR + 1.0F),
                  DEFAULT_INITIAL_CAPACITY),
               DEFAULT_LOAD_FACTOR);
          putAll(m);
      }