mirror of
https://github.com/PaperMC/Paper.git
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7df472527f
A long standing bug in spigot and its derivatives was the fact that players taking damage while blocking with a shield would not receive invulnerability, while they do in vanilla. This enabled the pvp technique of disabling a shield and immediately attacking again to knock a player into the air. While upstream fixed this and properly aligned itself with vanilla damage logic (in this specific case) changing such long standing behaviour has some downsides. To allow players used to this specific bug to still use it, this patch introduces a configuration option to re-introduce said bug. As there is no easy way to *only* re-add this bug, the option is found in the unsupported section as it may introduce other damage related disparity from vanilla.
344 lines
15 KiB
Diff
344 lines
15 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Spottedleaf <Spottedleaf@users.noreply.github.com>
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Date: Thu, 11 Mar 2021 20:05:44 -0800
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Subject: [PATCH] Custom table implementation for blockstate state lookups
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Testing some redstone intensive machines showed to bring about a 10%
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improvement.
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diff --git a/src/main/java/io/papermc/paper/util/table/ZeroCollidingReferenceStateTable.java b/src/main/java/io/papermc/paper/util/table/ZeroCollidingReferenceStateTable.java
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new file mode 100644
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index 0000000000000000000000000000000000000000..57d0cd3ad6f972e986c72a57f1a6e36003f190c2
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--- /dev/null
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+++ b/src/main/java/io/papermc/paper/util/table/ZeroCollidingReferenceStateTable.java
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@@ -0,0 +1,160 @@
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+package io.papermc.paper.util.table;
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+
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+import com.google.common.collect.Table;
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+import net.minecraft.world.level.block.state.StateHolder;
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+import net.minecraft.world.level.block.state.properties.Property;
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+import java.util.Collection;
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+import java.util.HashSet;
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+import java.util.Map;
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+import java.util.Set;
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+
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+public final class ZeroCollidingReferenceStateTable {
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+
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+ // upper 32 bits: starting index
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+ // lower 32 bits: bitset for contained ids
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+ protected final long[] this_index_table;
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+ protected final Comparable<?>[] this_table;
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+ protected final StateHolder<?, ?> this_state;
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+
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+ protected long[] index_table;
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+ protected StateHolder<?, ?>[][] value_table;
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+
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+ public ZeroCollidingReferenceStateTable(final StateHolder<?, ?> state, final Map<Property<?>, Comparable<?>> this_map) {
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+ this.this_state = state;
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+ this.this_index_table = this.create_table(this_map.keySet());
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+
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+ int max_id = -1;
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+ for (final Property<?> property : this_map.keySet()) {
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+ final int id = lookup_vindex(property, this.this_index_table);
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+ if (id > max_id) {
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+ max_id = id;
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+ }
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+ }
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+
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+ this.this_table = new Comparable[max_id + 1];
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+ for (final Map.Entry<Property<?>, Comparable<?>> entry : this_map.entrySet()) {
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+ this.this_table[lookup_vindex(entry.getKey(), this.this_index_table)] = entry.getValue();
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+ }
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+ }
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+
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+ public void loadInTable(final Table<Property<?>, Comparable<?>, StateHolder<?, ?>> table,
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+ final Map<Property<?>, Comparable<?>> this_map) {
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+ final Set<Property<?>> combined = new HashSet<>(table.rowKeySet());
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+ combined.addAll(this_map.keySet());
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+
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+ this.index_table = this.create_table(combined);
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+
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+ int max_id = -1;
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+ for (final Property<?> property : combined) {
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+ final int id = lookup_vindex(property, this.index_table);
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+ if (id > max_id) {
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+ max_id = id;
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+ }
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+ }
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+
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+ this.value_table = new StateHolder[max_id + 1][];
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+
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+ final Map<Property<?>, Map<Comparable<?>, StateHolder<?, ?>>> map = table.rowMap();
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+ for (final Property<?> property : map.keySet()) {
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+ final Map<Comparable<?>, StateHolder<?, ?>> propertyMap = map.get(property);
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+
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+ final int id = lookup_vindex(property, this.index_table);
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+ final StateHolder<?, ?>[] states = this.value_table[id] = new StateHolder[property.getPossibleValues().size()];
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+
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+ for (final Map.Entry<Comparable<?>, StateHolder<?, ?>> entry : propertyMap.entrySet()) {
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+ if (entry.getValue() == null) {
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+ // TODO what
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+ continue;
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+ }
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+
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+ states[((Property)property).getIdFor(entry.getKey())] = entry.getValue();
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+ }
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+ }
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+
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+
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+ for (final Map.Entry<Property<?>, Comparable<?>> entry : this_map.entrySet()) {
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+ final Property<?> property = entry.getKey();
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+ final int index = lookup_vindex(property, this.index_table);
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+
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+ if (this.value_table[index] == null) {
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+ this.value_table[index] = new StateHolder[property.getPossibleValues().size()];
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+ }
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+
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+ this.value_table[index][((Property)property).getIdFor(entry.getValue())] = this.this_state;
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+ }
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+ }
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+
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+
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+ protected long[] create_table(final Collection<Property<?>> collection) {
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+ int max_id = -1;
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+ for (final Property<?> property : collection) {
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+ final int id = property.getId();
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+ if (id > max_id) {
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+ max_id = id;
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+ }
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+ }
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+
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+ final long[] ret = new long[((max_id + 1) + 31) >>> 5]; // ceil((max_id + 1) / 32)
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+
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+ for (final Property<?> property : collection) {
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+ final int id = property.getId();
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+
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+ ret[id >>> 5] |= (1L << (id & 31));
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+ }
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+
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+ int total = 0;
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+ for (int i = 1, len = ret.length; i < len; ++i) {
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+ ret[i] |= (long)(total += Long.bitCount(ret[i - 1] & 0xFFFFFFFFL)) << 32;
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+ }
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+
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+ return ret;
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+ }
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+
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+ public Comparable<?> get(final Property<?> state) {
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+ final Comparable<?>[] table = this.this_table;
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+ final int index = lookup_vindex(state, this.this_index_table);
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+
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+ if (index < 0 || index >= table.length) {
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+ return null;
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+ }
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+ return table[index];
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+ }
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+
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+ public StateHolder<?, ?> get(final Property<?> property, final Comparable<?> with) {
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+ final int withId = ((Property)property).getIdFor(with);
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+ if (withId < 0) {
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+ return null;
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+ }
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+
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+ final int index = lookup_vindex(property, this.index_table);
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+ final StateHolder<?, ?>[][] table = this.value_table;
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+ if (index < 0 || index >= table.length) {
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+ return null;
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+ }
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+
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+ final StateHolder<?, ?>[] values = table[index];
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+
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+ if (withId >= values.length) {
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+ return null;
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+ }
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+
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+ return values[withId];
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+ }
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+
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+ protected static int lookup_vindex(final Property<?> property, final long[] index_table) {
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+ final int id = property.getId();
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+ final long bitset_mask = (1L << (id & 31));
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+ final long lower_mask = bitset_mask - 1;
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+ final int index = id >>> 5;
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+ if (index >= index_table.length) {
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+ return -1;
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+ }
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+ final long index_value = index_table[index];
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+ final long contains_check = ((index_value & bitset_mask) - 1) >> (Long.SIZE - 1); // -1L if doesn't contain
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+
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+ // index = total bits set in lower table values (upper 32 bits of index_value) plus total bits set in lower indices below id
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+ // contains_check is 0 if the bitset had id set, else it's -1: so index is unaffected if contains_check == 0,
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+ // otherwise it comes out as -1.
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+ return (int)(((index_value >>> 32) + Long.bitCount(index_value & lower_mask)) | contains_check);
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+ }
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+}
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diff --git a/src/main/java/net/minecraft/world/level/block/state/StateHolder.java b/src/main/java/net/minecraft/world/level/block/state/StateHolder.java
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index daedcfd867ed6171fb61bdcbded417a11c8a5b0f..45744d86e9582a93a0cec26009deea091080fbbe 100644
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--- a/src/main/java/net/minecraft/world/level/block/state/StateHolder.java
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+++ b/src/main/java/net/minecraft/world/level/block/state/StateHolder.java
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@@ -39,11 +39,13 @@ public abstract class StateHolder<O, S> {
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private final Reference2ObjectArrayMap<Property<?>, Comparable<?>> values;
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private Table<Property<?>, Comparable<?>, S> neighbours;
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protected final MapCodec<S> propertiesCodec;
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+ protected final io.papermc.paper.util.table.ZeroCollidingReferenceStateTable optimisedTable; // Paper - optimise state lookup
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protected StateHolder(O owner, Reference2ObjectArrayMap<Property<?>, Comparable<?>> propertyMap, MapCodec<S> codec) {
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this.owner = owner;
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this.values = propertyMap;
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this.propertiesCodec = codec;
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+ this.optimisedTable = new io.papermc.paper.util.table.ZeroCollidingReferenceStateTable(this, propertyMap); // Paper - optimise state lookup
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}
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public <T extends Comparable<T>> S cycle(Property<T> property) {
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@@ -84,11 +86,11 @@ public abstract class StateHolder<O, S> {
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}
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public <T extends Comparable<T>> boolean hasProperty(Property<T> property) {
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- return this.values.containsKey(property);
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+ return this.optimisedTable.get(property) != null; // Paper - optimise state lookup
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}
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public <T extends Comparable<T>> T getValue(Property<T> property) {
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- Comparable<?> comparable = this.values.get(property);
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+ Comparable<?> comparable = this.optimisedTable.get(property); // Paper - optimise state lookup
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if (comparable == null) {
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throw new IllegalArgumentException("Cannot get property " + property + " as it does not exist in " + this.owner);
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} else {
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@@ -97,24 +99,18 @@ public abstract class StateHolder<O, S> {
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}
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public <T extends Comparable<T>> Optional<T> getOptionalValue(Property<T> property) {
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- Comparable<?> comparable = this.values.get(property);
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+ Comparable<?> comparable = this.optimisedTable.get(property); // Paper - optimise state lookup
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return comparable == null ? Optional.empty() : Optional.of(property.getValueClass().cast(comparable));
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}
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public <T extends Comparable<T>, V extends T> S setValue(Property<T> property, V value) {
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- Comparable<?> comparable = this.values.get(property);
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- if (comparable == null) {
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- throw new IllegalArgumentException("Cannot set property " + property + " as it does not exist in " + this.owner);
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- } else if (comparable.equals(value)) {
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- return (S)this;
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- } else {
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- S object = this.neighbours.get(property, value);
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- if (object == null) {
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- throw new IllegalArgumentException("Cannot set property " + property + " to " + value + " on " + this.owner + ", it is not an allowed value");
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- } else {
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- return object;
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- }
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+ // Paper start - optimise state lookup
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+ final S ret = (S)this.optimisedTable.get(property, value);
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+ if (ret == null) {
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+ throw new IllegalArgumentException("Cannot set property " + property + " to " + value + " on " + this.owner + ", it is not an allowed value");
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}
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+ return ret;
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+ // Paper end - optimise state lookup
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}
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public <T extends Comparable<T>, V extends T> S trySetValue(Property<T> property, V value) {
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@@ -147,7 +143,7 @@ public abstract class StateHolder<O, S> {
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}
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}
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- this.neighbours = (Table<Property<?>, Comparable<?>, S>)(table.isEmpty() ? table : ArrayTable.create(table));
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+ this.neighbours = (Table<Property<?>, Comparable<?>, S>)(table.isEmpty() ? table : ArrayTable.create(table)); this.optimisedTable.loadInTable((Table)this.neighbours, this.values); // Paper - optimise state lookup
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}
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}
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diff --git a/src/main/java/net/minecraft/world/level/block/state/properties/BooleanProperty.java b/src/main/java/net/minecraft/world/level/block/state/properties/BooleanProperty.java
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index b63116b333b6e06494091a82588acfb639bddb71..ff5fd91257c4554c523682009efe1db83f53fd5b 100644
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--- a/src/main/java/net/minecraft/world/level/block/state/properties/BooleanProperty.java
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+++ b/src/main/java/net/minecraft/world/level/block/state/properties/BooleanProperty.java
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@@ -7,6 +7,13 @@ import java.util.Optional;
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public class BooleanProperty extends Property<Boolean> {
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private final ImmutableSet<Boolean> values = ImmutableSet.of(true, false);
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+ // Paper start - optimise iblockdata state lookup
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+ @Override
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+ public final int getIdFor(final Boolean value) {
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+ return value.booleanValue() ? 1 : 0;
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+ }
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+ // Paper end - optimise iblockdata state lookup
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+
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protected BooleanProperty(String name) {
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super(name, Boolean.class);
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}
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diff --git a/src/main/java/net/minecraft/world/level/block/state/properties/EnumProperty.java b/src/main/java/net/minecraft/world/level/block/state/properties/EnumProperty.java
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index 3097298fe356df98967cf4bdeaaede69dfe8a441..498c5abe0a9d024d77029719c621c1c8485791f3 100644
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--- a/src/main/java/net/minecraft/world/level/block/state/properties/EnumProperty.java
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+++ b/src/main/java/net/minecraft/world/level/block/state/properties/EnumProperty.java
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@@ -15,6 +15,15 @@ public class EnumProperty<T extends Enum<T> & StringRepresentable> extends Prope
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private final ImmutableSet<T> values;
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private final Map<String, T> names = Maps.newHashMap();
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+ // Paper start - optimise iblockdata state lookup
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+ private int[] idLookupTable;
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+
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+ @Override
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+ public final int getIdFor(final T value) {
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+ return this.idLookupTable[value.ordinal()];
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+ }
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+ // Paper end - optimise iblockdata state lookup
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+
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protected EnumProperty(String name, Class<T> type, Collection<T> values) {
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super(name, type);
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this.values = ImmutableSet.copyOf(values);
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@@ -27,6 +36,14 @@ public class EnumProperty<T extends Enum<T> & StringRepresentable> extends Prope
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this.names.put(string, enum_);
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}
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+ // Paper start - optimise BlockState lookup
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+ int id = 0;
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+ this.idLookupTable = new int[type.getEnumConstants().length];
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+ java.util.Arrays.fill(this.idLookupTable, -1);
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+ for (final T value : this.getPossibleValues()) {
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+ this.idLookupTable[value.ordinal()] = id++;
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+ }
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+ // Paper end - optimise BlockState lookup
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}
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@Override
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diff --git a/src/main/java/net/minecraft/world/level/block/state/properties/IntegerProperty.java b/src/main/java/net/minecraft/world/level/block/state/properties/IntegerProperty.java
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index 3a850321a4bcc68058483b5fd53e829c425a68af..977504f2641d0133a572b0d5de85d058609343bb 100644
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--- a/src/main/java/net/minecraft/world/level/block/state/properties/IntegerProperty.java
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+++ b/src/main/java/net/minecraft/world/level/block/state/properties/IntegerProperty.java
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@@ -11,6 +11,16 @@ public class IntegerProperty extends Property<Integer> {
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public final int min;
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public final int max;
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+ // Paper start - optimise iblockdata state lookup
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+ @Override
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+ public final int getIdFor(final Integer value) {
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+ final int val = value.intValue();
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+ final int ret = val - this.min;
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+
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+ return ret | ((this.max - ret) >> 31);
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+ }
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+ // Paper end - optimise iblockdata state lookup
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+
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protected IntegerProperty(String name, int min, int max) {
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super(name, Integer.class);
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if (min < 0) {
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diff --git a/src/main/java/net/minecraft/world/level/block/state/properties/Property.java b/src/main/java/net/minecraft/world/level/block/state/properties/Property.java
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index 9055f15af0cae55effa6942913a9d7edf3857e07..b9493e3762410aca8e683c32b5aef187c0bee082 100644
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--- a/src/main/java/net/minecraft/world/level/block/state/properties/Property.java
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+++ b/src/main/java/net/minecraft/world/level/block/state/properties/Property.java
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@@ -24,6 +24,17 @@ public abstract class Property<T extends Comparable<T>> {
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);
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private final Codec<Property.Value<T>> valueCodec = this.codec.xmap(this::value, Property.Value::value);
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+ // Paper start - optimise iblockdata state lookup
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+ private static final java.util.concurrent.atomic.AtomicInteger ID_GENERATOR = new java.util.concurrent.atomic.AtomicInteger();
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+ private final int id = ID_GENERATOR.getAndIncrement();
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+
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+ public final int getId() {
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+ return this.id;
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+ }
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+
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+ public abstract int getIdFor(final T value);
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+ // Paper end - optimise state lookup
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+
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protected Property(String name, Class<T> type) {
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this.clazz = type;
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this.name = name;
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