Mercurial > jhg

comparison src/org/tmatesoft/hg/internal/Pool.java @ 264:6bb5e7ed051a

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Optimize memory usage (reduce number of objects instantiated) when pooling file names and nodeids during manifest parsing
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Fri, 19 Aug 2011 03:36:25 +0200
parents 3dcd3dd90c77
children 12f668401613
comparison
equal deleted inserted replaced
263:31f67be94e71 264:6bb5e7ed051a
16 */ 16 */
17 package org.tmatesoft.hg.internal; 17 package org.tmatesoft.hg.internal;
18 18
19 import java.util.HashMap; 19 import java.util.HashMap;
20 20
21 import org.tmatesoft.hg.util.SparseSet;
22
23 /** 21 /**
24 * Instance pooling. 22 * Instance pooling.
25 * 23 *
26 * @author Artem Tikhomirov 24 * @author Artem Tikhomirov
27 * @author TMate Software Ltd. 25 * @author TMate Software Ltd.
28 */ 26 */
29 public class Pool<T> { 27 public class Pool<T> {
30 private final HashMap<T,T> unify; 28 private final HashMap<T,T> unify;
31 // private final SparseSet<T> unify = new SparseSet<T>();
32 29
33 public Pool() { 30 public Pool() {
34 unify = new HashMap<T, T>(); 31 unify = new HashMap<T, T>();
35 } 32 }
36 33
71 @Override 68 @Override
72 public String toString() { 69 public String toString() {
73 StringBuilder sb = new StringBuilder(); 70 StringBuilder sb = new StringBuilder();
74 sb.append(Pool.class.getSimpleName()); 71 sb.append(Pool.class.getSimpleName());
75 sb.append('<'); 72 sb.append('<');
76 // if (!unify.isEmpty()) { 73 if (!unify.isEmpty()) {
77 // sb.append(unify.keySet().iterator().next().getClass().getName()); 74 sb.append(unify.keySet().iterator().next().getClass().getName());
78 // } 75 }
79 sb.append('>'); 76 sb.append('>');
80 sb.append(':'); 77 sb.append(':');
81 sb.append(unify.size()); 78 sb.append(unify.size());
82 return sb.toString(); 79 return sb.toString();
83 } 80 }