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Paper/patches/removed/1.15/0078-Reduce-IO-ops-opening-a-new-region-file.patch
2021-06-11 14:02:28 +02:00

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From 299ea42df7d2ad51015e65dbbf5bb77a3d4f4e09 Mon Sep 17 00:00:00 2001
From: Antony Riley <antony@cyberiantiger.org>
Date: Tue, 29 Mar 2016 06:56:23 +0300
Subject: [PATCH] Reduce IO ops opening a new region file.
diff --git a/src/main/java/net/minecraft/server/RegionFile.java b/src/main/java/net/minecraft/server/RegionFile.java
index fb529eac9..faf425588 100644
--- a/src/main/java/net/minecraft/server/RegionFile.java
+++ b/src/main/java/net/minecraft/server/RegionFile.java
@@ -26,7 +26,7 @@ public class RegionFile implements AutoCloseable {
private final File file;
// Spigot end
private static final byte[] a = new byte[4096];
- private final RandomAccessFile b; // PAIL dataFile
+ private final RandomAccessFile b; private RandomAccessFile getDataFile() { return this.b; } // Paper - OBFHELPER // PAIL dataFile
private final int[] c = new int[1024];
private final int[] d = new int[1024];
private final List<Boolean> e; // PAIL freeSectors
@@ -59,10 +59,19 @@ public class RegionFile implements AutoCloseable {
this.e.set(1, false);
this.b.seek(0L);
+ // Paper Start
+ java.nio.ByteBuffer header = java.nio.ByteBuffer.allocate(8192);
+ while (header.hasRemaining()) {
+ if (this.getDataFile().getChannel().read(header) == -1) throw new java.io.EOFException();
+ }
+ ((java.nio.Buffer) header).clear();
+ java.nio.IntBuffer headerAsInts = header.asIntBuffer();
+ // Paper End
+
int k;
for (j = 0; j < 1024; ++j) {
- k = this.b.readInt();
+ k = headerAsInts.get(); // Paper
this.c[j] = k;
// Spigot start
int length = k & 255;
@@ -88,7 +97,7 @@ public class RegionFile implements AutoCloseable {
}
for (j = 0; j < 1024; ++j) {
- k = this.b.readInt();
+ k = headerAsInts.get(); // Paper
this.d[j] = k;
}
--
2.22.0