Paper/Spigot-Server-Patches/0079-Reduce-IO-ops-opening-a-new-region-file.patch
Spottedleaf 5c7081fecc Update upstream & fix some chunk related issues (#2177)
* Updated Upstream (Bukkit/CraftBukkit)

Upstream has released updates that appears to apply and compile correctly.
This update has not been tested by PaperMC and as with ANY update, please do your own testing

Bukkit Changes:
45690fe9 SPIGOT-5047: Correct slot types for 1.14 inventories

CraftBukkit Changes:
4090d01f SPIGOT-5047: Correct slot types for 1.14 inventories
e8c08362 SPIGOT-5046: World#getLoadedChunks returning inaccessible cached chunks.
d445af3b SPIGOT-5067: Add item meta for 1.14 spawn eggs

* Bring Chunk load checks in-line with spigot

As of the last upstream merge spigot now checks ticket level status
when returning loaded chunks for a world from api. Now our checks
will respect that decision.

* Fix spawn ticket levels

Vanilla would keep the inner chunks of spawn available for ticking,
however my changes made all chunks non-ticking. Resolve by changing
ticket levels for spawn chunks inside the border to respect this
behavior.


* Make World#getChunkIfLoadedImmediately return only entity ticking chunks

Mojang appears to be using chunks with level > 33 (non-ticking chunks)
as cached chunks and not actually loaded chunks.

* Bring all loaded checks in line with spigot

Loaded chunks must be at least border  chunks, or level <= 33
2019-06-14 03:27:40 +01:00

53 lines
1.9 KiB
Diff

From acd3e26def5fdb90fad703740cd0c0a13ebe01cc 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 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<Boolean> 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