135 lines
4.9 KiB
Diff
135 lines
4.9 KiB
Diff
From a11aa1e2aecca3e245bb003b7caf9e4287e14271 Mon Sep 17 00:00:00 2001
|
|
From: md_5 <md_5@live.com.au>
|
|
Date: Sat, 23 Mar 2013 09:29:43 +1100
|
|
Subject: [PATCH] LongHash Tweaks.
|
|
|
|
This commit adds a flat array based cache to the LongHash(Set/Map) classes leading to excellent efficiency for servers where most activity is centered around the origin (0,0)
|
|
|
|
diff --git a/src/main/java/org/bukkit/craftbukkit/util/FlatMap.java b/src/main/java/org/bukkit/craftbukkit/util/FlatMap.java
|
|
new file mode 100644
|
|
index 0000000..e8a7725
|
|
--- /dev/null
|
|
+++ b/src/main/java/org/bukkit/craftbukkit/util/FlatMap.java
|
|
@@ -0,0 +1,34 @@
|
|
+package org.bukkit.craftbukkit.util;
|
|
+
|
|
+public class FlatMap<V> {
|
|
+
|
|
+ private static final int FLAT_LOOKUP_SIZE = 512;
|
|
+ private final Object[][] flatLookup = new Object[FLAT_LOOKUP_SIZE * 2][FLAT_LOOKUP_SIZE * 2];
|
|
+
|
|
+ public void put(long msw, long lsw, V value) {
|
|
+ long acx = Math.abs(msw);
|
|
+ long acz = Math.abs(lsw);
|
|
+ if (acx < FLAT_LOOKUP_SIZE && acz < FLAT_LOOKUP_SIZE) {
|
|
+ flatLookup[(int) (msw + FLAT_LOOKUP_SIZE)][(int) (lsw + FLAT_LOOKUP_SIZE)] = value;
|
|
+ }
|
|
+ }
|
|
+
|
|
+ public void put(long key, V value) {
|
|
+ put(LongHash.msw(key), LongHash.lsw(key), value);
|
|
+
|
|
+ }
|
|
+
|
|
+ public V get(long msw, long lsw) {
|
|
+ long acx = Math.abs(msw);
|
|
+ long acz = Math.abs(lsw);
|
|
+ if (acx < FLAT_LOOKUP_SIZE && acz < FLAT_LOOKUP_SIZE) {
|
|
+ return (V) flatLookup[(int) (msw + FLAT_LOOKUP_SIZE)][(int) (lsw + FLAT_LOOKUP_SIZE)];
|
|
+ } else {
|
|
+ return null;
|
|
+ }
|
|
+ }
|
|
+
|
|
+ public V get(long key) {
|
|
+ return get(LongHash.msw(key), LongHash.lsw(key));
|
|
+ }
|
|
+}
|
|
diff --git a/src/main/java/org/bukkit/craftbukkit/util/LongHashSet.java b/src/main/java/org/bukkit/craftbukkit/util/LongHashSet.java
|
|
index 22c96c5..331d570 100644
|
|
--- a/src/main/java/org/bukkit/craftbukkit/util/LongHashSet.java
|
|
+++ b/src/main/java/org/bukkit/craftbukkit/util/LongHashSet.java
|
|
@@ -31,6 +31,8 @@ public class LongHashSet {
|
|
private int elements;
|
|
private long[] values;
|
|
private int modCount;
|
|
+ private static final Object PRESENT = new Object();
|
|
+ private final FlatMap<Object> flat = new FlatMap<Object>();
|
|
|
|
public LongHashSet() {
|
|
this(INITIAL_SIZE);
|
|
@@ -56,10 +58,12 @@ public class LongHashSet {
|
|
}
|
|
|
|
public boolean contains(int msw, int lsw) {
|
|
+ if (flat.get(msw, lsw) != null) return true; // Spigot
|
|
return contains(LongHash.toLong(msw, lsw));
|
|
}
|
|
|
|
public boolean contains(long value) {
|
|
+ if (flat.get(value) != null) return true; // Spigot
|
|
int hash = hash(value);
|
|
int index = (hash & 0x7FFFFFFF) % values.length;
|
|
int offset = 1;
|
|
@@ -82,6 +86,7 @@ public class LongHashSet {
|
|
}
|
|
|
|
public boolean add(long value) {
|
|
+ flat.put(value, PRESENT); // Spigot
|
|
int hash = hash(value);
|
|
int index = (hash & 0x7FFFFFFF) % values.length;
|
|
int offset = 1;
|
|
@@ -125,10 +130,11 @@ public class LongHashSet {
|
|
}
|
|
|
|
public void remove(int msw, int lsw) {
|
|
+ flat.put(msw, lsw, null); // Spigot
|
|
remove(LongHash.toLong(msw, lsw));
|
|
}
|
|
|
|
- public boolean remove(long value) {
|
|
+ private boolean remove(long value) { // Spigot
|
|
int hash = hash(value);
|
|
int index = (hash & 0x7FFFFFFF) % values.length;
|
|
int offset = 1;
|
|
diff --git a/src/main/java/org/bukkit/craftbukkit/util/LongObjectHashMap.java b/src/main/java/org/bukkit/craftbukkit/util/LongObjectHashMap.java
|
|
index 01861cc..dbd33fa 100644
|
|
--- a/src/main/java/org/bukkit/craftbukkit/util/LongObjectHashMap.java
|
|
+++ b/src/main/java/org/bukkit/craftbukkit/util/LongObjectHashMap.java
|
|
@@ -28,6 +28,7 @@ public class LongObjectHashMap<V> implements Cloneable, Serializable {
|
|
private transient V[][] values;
|
|
private transient int modCount;
|
|
private transient int size;
|
|
+ private final FlatMap<V> flat = new FlatMap<V>(); // Spigot
|
|
|
|
public LongObjectHashMap() {
|
|
initialize();
|
|
@@ -61,6 +62,8 @@ public class LongObjectHashMap<V> implements Cloneable, Serializable {
|
|
}
|
|
|
|
public V get(long key) {
|
|
+ V val = flat.get(key); // Spigot
|
|
+ if (val != null) return val; // Spigot
|
|
int index = (int) (keyIndex(key) & (BUCKET_SIZE - 1));
|
|
long[] inner = keys[index];
|
|
if (inner == null) return null;
|
|
@@ -78,6 +81,7 @@ public class LongObjectHashMap<V> implements Cloneable, Serializable {
|
|
}
|
|
|
|
public V put(long key, V value) {
|
|
+ flat.put(key, value); // Spigot
|
|
int index = (int) (keyIndex(key) & (BUCKET_SIZE - 1));
|
|
long[] innerKeys = keys[index];
|
|
V[] innerValues = values[index];
|
|
@@ -124,6 +128,7 @@ public class LongObjectHashMap<V> implements Cloneable, Serializable {
|
|
}
|
|
|
|
public V remove(long key) {
|
|
+ flat.put(key, null); // Spigot
|
|
int index = (int) (keyIndex(key) & (BUCKET_SIZE - 1));
|
|
long[] inner = keys[index];
|
|
if (inner == null) {
|
|
--
|
|
1.8.1.2
|
|
|