Thu, 30 Jul 2009 10:29:53 +0100
6827648: Extremely slow compilation time for visitor pattern code + generics
Summary: Javac unnecessarily recomputates type-substitutions multiple times
Reviewed-by: jjg
1 /*
2 * Copyright 2006 Sun Microsystems, Inc. All Rights Reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 */
24 import java.util.List;
25 import java.io.*;
27 class Test {
28 void m1(int m1_arg) {
29 String x = "x, m1_arg, super, this; List, Test2, Test; java.io.*, java.lang.*";
30 String y = "y, x, m1_arg, super, this; List, Test2, Test; java.io.*, java.lang.*";
31 String z = "z, y, x, m1_arg, super, this; List, Test2, Test; java.io.*, java.lang.*";
32 Object o = new Object() {
33 public boolean equals(Object other) {
34 String p = "p, other, super, this; -, o, z, y, x, m1_arg, super, this; List, Test2, Test; java.io.*, java.lang.*";
35 String q = "q, p, other, super, this; -, o, z, y, x, m1_arg, super, this; List, Test2, Test; java.io.*, java.lang.*";
36 String r = "r, q, p, other, super, this; -, o, z, y, x, m1_arg, super, this; List, Test2, Test; java.io.*, java.lang.*";
37 return (this == other);
38 }
39 };
40 }
42 String s = "super, this; List, Test2, Test; java.io.*, java.lang.*";
44 boolean b = new Object() {
45 public boolean equals(Object other) {
46 String p = "p, other, super, this; super, this; List, Test2, Test; java.io.*, java.lang.*";
47 String q = "q, p, other, super, this; super, this; List, Test2, Test; java.io.*, java.lang.*";
48 String r = "r, q, p, other, super, this; super, this; List, Test2, Test; java.io.*, java.lang.*";
49 return (this == other);
50 }
52 }.equals(null);
53 }
55 class Test2 { }