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8080535: (ch) Expected size of Character.UnicodeBlock.map is not optimal

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Reviewed-by: martin, chegar
This commit is contained in:
Ivan Gerasimov 2015-05-18 19:15:50 +03:00
parent 7e89934d9e
commit 43b2601a96
2 changed files with 81 additions and 3 deletions
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12
jdk/src/java.base/share/classes/java/lang/Character.java
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2002, 2013, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2002, 2015, 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
@ -645,8 +645,14 @@ class Character implements java.io.Serializable, Comparable<Character> {
* @since 1.2
*/
public static final class UnicodeBlock extends Subset {
private static Map<String, UnicodeBlock> map = new HashMap<>(256);
/**
* 510 - the expected number of enteties
* 0.75 - the default load factor of HashMap
*/
private static final int INITIAL_CAPACITY =
(int)(510 / 0.75f + 1.0f);
private static Map<String, UnicodeBlock> map =
new HashMap<>(INITIAL_CAPACITY);
/**
* Creates a UnicodeBlock with the given identifier name.