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4768e3c4ed
Reduces number of instructions a chunk lookup does when accessing the last chunk cache. This reduces amount of work and opcodes and allows better inlining. In lots of profiling comparisons, this optimization was able to reduce the cost of repeated chunk lookups that hit the cache pretty significantly.
62 lines
2.8 KiB
Diff
62 lines
2.8 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: Tue, 14 Jan 2020 14:59:08 -0800
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Subject: [PATCH] Optimise Chunk#getFluid
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Removing the try catch and generally reducing ops should make it
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faster on its own, however removing the try catch makes it
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easier to inline due to code size
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diff --git a/src/main/java/net/minecraft/server/Chunk.java b/src/main/java/net/minecraft/server/Chunk.java
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index 81504bfbbd4a987c95f35d0f25754dbf8b2487e4..8e91a0270a7a72f09dfc86331a788765de1f9f5e 100644
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--- a/src/main/java/net/minecraft/server/Chunk.java
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+++ b/src/main/java/net/minecraft/server/Chunk.java
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@@ -390,17 +390,20 @@ public class Chunk implements IChunkAccess {
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}
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public Fluid a(int i, int j, int k) {
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- try {
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- if (j >= 0 && j >> 4 < this.sections.length) {
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- ChunkSection chunksection = this.sections[j >> 4];
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-
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- if (!ChunkSection.a(chunksection)) {
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- return chunksection.b(i & 15, j & 15, k & 15);
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+ //try { // Paper - remove try catch
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+ // Paper start - reduce the number of ops in this call
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+ int index = j >> 4;
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+ if (index >= 0 && index < this.sections.length) {
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+ ChunkSection chunksection = this.sections[index];
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+
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+ if (chunksection != null) {
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+ return chunksection.blockIds.a((j & 15) << 8 | (k & 15) << 4 | i & 15).getFluid();
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}
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+ // Paper end
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}
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return FluidTypes.EMPTY.h();
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- } catch (Throwable throwable) {
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+ /*} catch (Throwable throwable) { // Paper - remove try catch
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CrashReport crashreport = CrashReport.a(throwable, "Getting fluid state");
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CrashReportSystemDetails crashreportsystemdetails = crashreport.a("Block being got");
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@@ -409,6 +412,7 @@ public class Chunk implements IChunkAccess {
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});
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throw new ReportedException(crashreport);
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}
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+ */ // Paper - remove try catch
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}
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// CraftBukkit start
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diff --git a/src/main/java/net/minecraft/server/ChunkSection.java b/src/main/java/net/minecraft/server/ChunkSection.java
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index 668942c629732b8d46b7f2646df8e7827baae240..39572cdce691a459cb9df0cc064fbf7bde83a99e 100644
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--- a/src/main/java/net/minecraft/server/ChunkSection.java
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+++ b/src/main/java/net/minecraft/server/ChunkSection.java
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@@ -38,7 +38,7 @@ public class ChunkSection {
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}
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public Fluid b(int i, int j, int k) {
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- return ((IBlockData) this.blockIds.a(i, j, k)).getFluid();
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+ return ((IBlockData) this.blockIds.a(i, j, k)).getFluid(); // Paper - diff on change - we expect this to be effectively just getType(x, y, z).getFluid(). If this changes we need to check other patches that use IBlockData#getFluid.
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}
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public void a() {
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