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Further optimize getBiome #637

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Further optimize getBiome #637

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18 changes: 13 additions & 5 deletions leaf-server/minecraft-patches/features/0097-Carpet-Fixes-Optimized-getBiome-method.patch
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Original file line number Diff line number Diff line change
Expand Up @@ -9,8 +9,10 @@ Original project: https://github.com/fxmorin/carpet-fixes
Optimized the getBiome call to be 25% - 75% faster
This is a fully vanilla optimization.

Co-authored-by: HaHaWTH <[email protected]>

diff --git a/net/minecraft/world/level/biome/BiomeManager.java b/net/minecraft/world/level/biome/BiomeManager.java
index 73962e79a0f3d892e3155443a1b84508b0f4042e..a48175a7ebb1788ace46395621ed78d910178a53 100644
index 73962e79a0f3d892e3155443a1b84508b0f4042e..93cbe1d76efd97899ea520a92e88b94639824174 100644
--- a/net/minecraft/world/level/biome/BiomeManager.java
+++ b/net/minecraft/world/level/biome/BiomeManager.java
@@ -14,6 +14,7 @@ public class BiomeManager {
Expand All @@ -21,9 +23,11 @@ index 73962e79a0f3d892e3155443a1b84508b0f4042e..a48175a7ebb1788ace46395621ed78d9

public BiomeManager(BiomeManager.NoiseBiomeSource noiseBiomeSource, long biomeZoomSeed) {
this.noiseBiomeSource = noiseBiomeSource;
@@ -29,39 +30,67 @@ public class BiomeManager {
@@ -28,40 +29,73 @@ public class BiomeManager {
return new BiomeManager(newSource, this.biomeZoomSeed);
}

+ private static final double[] QUART_OFFSETS = new double[]{0.0, 0.25, 0.5, 0.75}; // Leaf - Optimized getBiome method - eliminate divisions
public Holder<Biome> getBiome(BlockPos pos) {
- int i = pos.getX() - 2;
- int i1 = pos.getY() - 2;
Expand All @@ -43,9 +47,13 @@ index 73962e79a0f3d892e3155443a1b84508b0f4042e..a48175a7ebb1788ace46395621ed78d9
+ int x = xMinus2 >> 2; // BlockPos to BiomePos
+ int y = yMinus2 >> 2;
+ int z = zMinus2 >> 2;
+ double quartX = (double) (xMinus2 & 3) / 4.0; // quartLocal divided by 4
+ double quartY = (double) (yMinus2 & 3) / 4.0; // 0/4, 1/4, 2/4, 3/4
+ double quartZ = (double) (zMinus2 & 3) / 4.0; // [0, 0.25, 0.5, 0.75]
+ // Leaf start - Optimized getBiome method - eliminate divisions
+ // any integer & 3 falls in [0,1,2,3]
+ // then the division by 4 result is deterministic [0, 0.25, 0.5, 0.75]
+ double quartX = QUART_OFFSETS[xMinus2 & 3];
+ double quartY = QUART_OFFSETS[yMinus2 & 3];
+ double quartZ = QUART_OFFSETS[zMinus2 & 3];
+ // Leaf end - Optimized getBiome method - eliminate divisions
+ int smallestX = 0;
+ double smallestDist = Double.POSITIVE_INFINITY;
+ for (int biomeX = 0; biomeX < 8; ++biomeX) {
Expand Down
10 changes: 5 additions & 5 deletions ...erver/minecraft-patches/features/0230-cache-biome-for-mob-spawning-and-advancements.patch
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Original file line number Diff line number Diff line change
Expand Up @@ -57,7 +57,7 @@ index c0ed4a8c23eaaf802985cd3f9c286e2fab1d9f59..0cb3e9f4e51f30fc21c50eeb96ff1bb8

public static boolean isInNetherFortressBounds(BlockPos pos, ServerLevel level, MobCategory category, StructureManager structureManager) {
diff --git a/net/minecraft/world/level/biome/BiomeManager.java b/net/minecraft/world/level/biome/BiomeManager.java
index a48175a7ebb1788ace46395621ed78d910178a53..787f06557ca894cbcffe747fa2c793ce91316826 100644
index 93cbe1d76efd97899ea520a92e88b94639824174..7b03cdec6dccaf6991e32ccbbe2fa8dfbe8dd385 100644
--- a/net/minecraft/world/level/biome/BiomeManager.java
+++ b/net/minecraft/world/level/biome/BiomeManager.java
@@ -15,10 +15,23 @@ public class BiomeManager {
Expand All @@ -84,9 +84,9 @@ index a48175a7ebb1788ace46395621ed78d910178a53..787f06557ca894cbcffe747fa2c793ce
}

public static long obfuscateSeed(long seed) {
@@ -30,10 +43,36 @@ public class BiomeManager {
}
@@ -31,10 +44,36 @@ public class BiomeManager {

private static final double[] QUART_OFFSETS = new double[]{0.0, 0.25, 0.5, 0.75}; // Leaf - Optimized getBiome method - eliminate divisions
public Holder<Biome> getBiome(BlockPos pos) {
- // Leaf start - Carpet-Fixes - Optimized getBiome method
+ return getBiome(null, pos.getX() - 2, pos.getY() - 2, pos.getZ() - 2); // Leaf - cache getBiome
Expand Down Expand Up @@ -122,7 +122,7 @@ index a48175a7ebb1788ace46395621ed78d910178a53..787f06557ca894cbcffe747fa2c793ce
int x = xMinus2 >> 2; // BlockPos to BiomePos
int y = yMinus2 >> 2;
int z = zMinus2 >> 2;
@@ -85,13 +124,16 @@ public class BiomeManager {
@@ -90,13 +129,16 @@ public class BiomeManager {
smallestDist = biomeDist;
}
}
Expand All @@ -144,7 +144,7 @@ index a48175a7ebb1788ace46395621ed78d910178a53..787f06557ca894cbcffe747fa2c793ce

public Holder<Biome> getNoiseBiomeAtPosition(double x, double y, double z) {
int quartPosCoord = QuartPos.fromBlock(Mth.floor(x));
@@ -126,9 +168,18 @@ public class BiomeManager {
@@ -131,9 +173,18 @@ public class BiomeManager {
return Mth.square(zNoise + fiddle2) + Mth.square(yNoise + fiddle1) + Mth.square(xNoise + fiddle);
}

Expand Down