From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 From: Aikar <aikar@aikar.co> Date: Tue, 5 Apr 2016 21:38:58 -0400 Subject: [PATCH] Optimize DataBits Remove Debug checks as these are super hot and causing noticeable hits Before: http://i.imgur.com/nQsMzAE.png After: http://i.imgur.com/nJ46crB.png Optimize redundant converting of static fields into an unsigned long each call by precomputing it in ctor diff --git a/src/main/java/net/minecraft/util/SimpleBitStorage.java b/src/main/java/net/minecraft/util/SimpleBitStorage.java index dea4f322f750a0a09407fdb48d5d6e809dfe8ed4..9f438d9c6eb05e43d24e4af68188a3d4c46a938c 100644 --- a/src/main/java/net/minecraft/util/SimpleBitStorage.java +++ b/src/main/java/net/minecraft/util/SimpleBitStorage.java @@ -204,8 +204,8 @@ public class SimpleBitStorage implements BitStorage { private final long mask; private final int size; private final int valuesPerLong; - private final int divideMul; - private final int divideAdd; + private final int divideMul; private final long divideMulUnsigned; // Paper - Perf: Optimize SimpleBitStorage; referenced in b(int) with 2 Integer.toUnsignedLong calls + private final int divideAdd; private final long divideAddUnsigned; // Paper - Perf: Optimize SimpleBitStorage private final int divideShift; public SimpleBitStorage(int elementBits, int size, int[] data) { @@ -248,8 +248,8 @@ public class SimpleBitStorage implements BitStorage { this.mask = (1L << elementBits) - 1L; this.valuesPerLong = (char)(64 / elementBits); int i = 3 * (this.valuesPerLong - 1); - this.divideMul = MAGIC[i + 0]; - this.divideAdd = MAGIC[i + 1]; + this.divideMul = MAGIC[i + 0]; this.divideMulUnsigned = Integer.toUnsignedLong(this.divideMul); // Paper - Perf: Optimize SimpleBitStorage + this.divideAdd = MAGIC[i + 1]; this.divideAddUnsigned = Integer.toUnsignedLong(this.divideAdd); // Paper - Perf: Optimize SimpleBitStorage this.divideShift = MAGIC[i + 2]; int j = (size + this.valuesPerLong - 1) / this.valuesPerLong; if (data != null) { @@ -264,15 +264,15 @@ public class SimpleBitStorage implements BitStorage { } private int cellIndex(int index) { - long l = Integer.toUnsignedLong(this.divideMul); - long m = Integer.toUnsignedLong(this.divideAdd); - return (int)((long)index * l + m >> 32 >> this.divideShift); + //long l = Integer.toUnsignedLong(this.divideMul); // Paper - Perf: Optimize SimpleBitStorage + //long m = Integer.toUnsignedLong(this.divideAdd); // Paper - Perf: Optimize SimpleBitStorage + return (int) (index * this.divideMulUnsigned + this.divideAddUnsigned >> 32 >> this.divideShift); // Paper - Perf: Optimize SimpleBitStorage } @Override - public int getAndSet(int index, int value) { - Validate.inclusiveBetween(0L, (long)(this.size - 1), (long)index); - Validate.inclusiveBetween(0L, this.mask, (long)value); + public final int getAndSet(int index, int value) { // Paper - Perf: Optimize SimpleBitStorage + //Validate.inclusiveBetween(0L, (long)(this.size - 1), (long)index); // Paper - Perf: Optimize SimpleBitStorage + //Validate.inclusiveBetween(0L, this.mask, (long)value); // Paper - Perf: Optimize SimpleBitStorage int i = this.cellIndex(index); long l = this.data[i]; int j = (index - i * this.valuesPerLong) * this.bits; @@ -282,9 +282,9 @@ public class SimpleBitStorage implements BitStorage { } @Override - public void set(int index, int value) { - Validate.inclusiveBetween(0L, (long)(this.size - 1), (long)index); - Validate.inclusiveBetween(0L, this.mask, (long)value); + public final void set(int index, int value) { // Paper - Perf: Optimize SimpleBitStorage + //Validate.inclusiveBetween(0L, (long)(this.size - 1), (long)index); // Paper - Perf: Optimize SimpleBitStorage + //Validate.inclusiveBetween(0L, this.mask, (long)value); // Paper - Perf: Optimize SimpleBitStorage int i = this.cellIndex(index); long l = this.data[i]; int j = (index - i * this.valuesPerLong) * this.bits; @@ -292,8 +292,8 @@ public class SimpleBitStorage implements BitStorage { } @Override - public int get(int index) { - Validate.inclusiveBetween(0L, (long)(this.size - 1), (long)index); + public final int get(int index) { // Paper - Perf: Optimize SimpleBitStorage + //Validate.inclusiveBetween(0L, (long)(this.size - 1), (long)index); // Paper - Perf: Optimize SimpleBitStorage int i = this.cellIndex(index); long l = this.data[i]; int j = (index - i * this.valuesPerLong) * this.bits; diff --git a/src/main/java/net/minecraft/util/ZeroBitStorage.java b/src/main/java/net/minecraft/util/ZeroBitStorage.java index 8dd5a5899e9b5d8b3f1a6064dd7c1580313da69e..50040c497a819cd1229042ab3cb057d34a32cacc 100644 --- a/src/main/java/net/minecraft/util/ZeroBitStorage.java +++ b/src/main/java/net/minecraft/util/ZeroBitStorage.java @@ -13,21 +13,21 @@ public class ZeroBitStorage implements BitStorage { } @Override - public int getAndSet(int index, int value) { - Validate.inclusiveBetween(0L, (long)(this.size - 1), (long)index); - Validate.inclusiveBetween(0L, 0L, (long)value); + public final int getAndSet(int index, int value) { // Paper - Perf: Optimize SimpleBitStorage + //Validate.inclusiveBetween(0L, (long)(this.size - 1), (long)index); // Paper - Perf: Optimize SimpleBitStorage + //Validate.inclusiveBetween(0L, 0L, (long)value); // Paper - Perf: Optimize SimpleBitStorage return 0; } @Override - public void set(int index, int value) { - Validate.inclusiveBetween(0L, (long)(this.size - 1), (long)index); - Validate.inclusiveBetween(0L, 0L, (long)value); + public final void set(int index, int value) { // Paper - Perf: Optimize SimpleBitStorage + //Validate.inclusiveBetween(0L, (long)(this.size - 1), (long)index); // Paper - Perf: Optimize SimpleBitStorage + //Validate.inclusiveBetween(0L, 0L, (long)value); // Paper - Perf: Optimize SimpleBitStorage } @Override - public int get(int index) { - Validate.inclusiveBetween(0L, (long)(this.size - 1), (long)index); + public final int get(int index) { // Paper - Perf: Optimize SimpleBitStorage + //Validate.inclusiveBetween(0L, (long)(this.size - 1), (long)index); // Paper - Perf: Optimize SimpleBitStorage return 0; }