From acd3e26def5fdb90fad703740cd0c0a13ebe01cc Mon Sep 17 00:00:00 2001 From: Antony Riley 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 b062a31c49..4e6288e8bb 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; + private final RandomAccessFile b; private RandomAccessFile getDataFile() { return this.b; } // Paper - OBFHELPER private final int[] c = new int[1024]; private final int[] d = new int[1024]; private final List e; @@ -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(); + } + 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; } -- 2.21.0