Paper/CraftBukkit-Patches/0141-Prevent-Unbounded-IntCache-Growth.patch

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From 60944a311fc57886c97c4a7c6c74ca605320b32f Mon Sep 17 00:00:00 2001
From: md_5 <git@md-5.net>
Date: Fri, 20 Jun 2014 19:40:00 +1000
Subject: [PATCH] Prevent Unbounded IntCache Growth
Based on work by Peter Lawrey, this commit prevents unbounded growth of the integer cache and instead caps it to a value specified in the configuration (1024 by default). Should prevent thrashing, especially around world generation.
diff --git a/src/main/java/net/minecraft/server/IntCache.java b/src/main/java/net/minecraft/server/IntCache.java
index 9858720..47e06df 100644
--- a/src/main/java/net/minecraft/server/IntCache.java
+++ b/src/main/java/net/minecraft/server/IntCache.java
@@ -17,11 +17,11 @@ public class IntCache {
if (i <= 256) {
if (b.isEmpty()) {
aint = new int[256];
- c.add(aint);
+ if (c.size() < org.spigotmc.SpigotConfig.intCacheLimit) c.add(aint);
return aint;
} else {
aint = (int[]) b.remove(b.size() - 1);
- c.add(aint);
+ if (c.size() < org.spigotmc.SpigotConfig.intCacheLimit) c.add(aint);
return aint;
}
} else if (i > a) {
@@ -29,15 +29,15 @@ public class IntCache {
d.clear();
e.clear();
aint = new int[a];
- e.add(aint);
+ if (e.size() < org.spigotmc.SpigotConfig.intCacheLimit) e.add(aint);
return aint;
} else if (d.isEmpty()) {
aint = new int[a];
- e.add(aint);
+ if (e.size() < org.spigotmc.SpigotConfig.intCacheLimit) e.add(aint);
return aint;
} else {
aint = (int[]) d.remove(d.size() - 1);
- e.add(aint);
+ if (e.size() < org.spigotmc.SpigotConfig.intCacheLimit) e.add(aint);
return aint;
}
}
diff --git a/src/main/java/org/spigotmc/SpigotConfig.java b/src/main/java/org/spigotmc/SpigotConfig.java
index 46c8573..429ad36 100644
--- a/src/main/java/org/spigotmc/SpigotConfig.java
+++ b/src/main/java/org/spigotmc/SpigotConfig.java
@@ -327,4 +327,10 @@ public class SpigotConfig
{
saveUserCacheOnStopOnly = getBoolean( "settings.save-user-cache-on-stop-only", false );
}
+
+ public static int intCacheLimit;
+ private static void intCacheLimit()
+ {
+ intCacheLimit = getInt( "settings.int-cache-limit", 1024 );
+ }
}
--
1.9.1