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18c3716c49
This enables us a fast reference to the entities current chunk instead of having to look it up by hashmap lookups. We also store counts by type to further enable other performance optimizations in later patches.
53 lines
1.9 KiB
Diff
53 lines
1.9 KiB
Diff
From b4237ef0e075d98a14b87bfd673d34b96cb1d966 Mon Sep 17 00:00:00 2001
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From: Antony Riley <antony@cyberiantiger.org>
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Date: Tue, 29 Mar 2016 06:56:23 +0300
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Subject: [PATCH] Reduce IO ops opening a new region file.
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diff --git a/src/main/java/net/minecraft/server/RegionFile.java b/src/main/java/net/minecraft/server/RegionFile.java
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index 5bcbd718f..2bd85e2d1 100644
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--- a/src/main/java/net/minecraft/server/RegionFile.java
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+++ b/src/main/java/net/minecraft/server/RegionFile.java
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@@ -8,9 +8,12 @@ import java.io.ByteArrayInputStream;
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import java.io.ByteArrayOutputStream;
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import java.io.DataInputStream;
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import java.io.DataOutputStream;
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+import java.io.EOFException;
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import java.io.File;
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import java.io.IOException;
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import java.io.RandomAccessFile;
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+import java.nio.ByteBuffer;
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+import java.nio.IntBuffer;
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import java.util.List;
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import java.util.zip.DeflaterOutputStream;
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import java.util.zip.GZIPInputStream;
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@@ -67,8 +70,16 @@ public class RegionFile {
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int k;
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+ // Paper Start
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+ ByteBuffer header = ByteBuffer.allocate(8192);
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+ while (header.hasRemaining()) {
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+ if (this.c.getChannel().read(header) == -1) throw new EOFException();
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+ }
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+ header.clear();
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+ IntBuffer headerAsInts = header.asIntBuffer();
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+ // Paper End
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for (j = 0; j < 1024; ++j) {
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- k = this.c.readInt();
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+ k = headerAsInts.get(); // Paper
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this.d[j] = k;
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if (k != 0 && (k >> 8) + (k & 255) <= this.f.size()) {
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for (int l = 0; l < (k & 255); ++l) {
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@@ -78,7 +89,7 @@ public class RegionFile {
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}
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for (j = 0; j < 1024; ++j) {
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- k = this.c.readInt();
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+ k = headerAsInts.get(); // Paper
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this.e[j] = k;
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}
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} catch (IOException ioexception) {
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--
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2.18.0
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