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Any full status chunk that was requested for any status less than full would hold onto their entire nbt tree and every variable in that function. This was due to use of a lambda that persists on the Chunk object until that chunk reaches FULL status. With introduction of no tick, we greatly increased the number of non full chunks so this was really starting to hurt. We further improve it by making a copy of the nbt tag with only the memory it needs, so that we dont have to hold a copy to the entire compound.
Paper 
High performance Spigot fork that aims to fix gameplay and mechanics inconsistencies.
Support and Project Discussion:
How To (Server Admins)
Paperclip is a jar file that you can download and run just like a normal jar file.
Download Paper from our downloads page.
Run the Paperclip jar directly from your server. Just like old times
- Documentation on using Paper: paper.readthedocs.io
- For a sneak peak on upcoming features, see here
How To (Plugin Developers)
- See our API patches here
- See upcoming, pending, and recently added API here
- Paper API javadocs here: papermc.io/javadocs
- Maven Repo (for paper-api):
<repository>
<id>papermc</id>
<url>https://papermc.io/repo/repository/maven-public/</url>
</repository>
- Artifact Information:
<dependency>
<groupId>com.destroystokyo.paper</groupId>
<artifactId>paper-api</artifactId>
<version>1.15.2-R0.1-SNAPSHOT</version>
<scope>provided</scope>
</dependency>
How To (Compiling Jar From Source)
To compile Paper, you need JDK 8, maven, and an internet connection.
Clone this repo, run ./paper jar from bash, get files.
How To (Pull Request)
See Contributing
Special Thanks To:
YourKit, makers of the outstanding java profiler, support open source projects of all kinds with their full featured Java and .NET application profilers. We thank them for granting Paper an OSS license so that we can make our software the best it can be.