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TruffleRuby is the GraalVM high-performance implementation of the Ruby programming language.

Getting Started

TruffleRuby comes in two distributions:

You can install either of those:

Native Standalone:

RVM:    $ rvm install truffleruby # or truffleruby-head
rbenv:  $ rbenv install truffleruby-VERSION
asdf:   $ asdf install ruby truffleruby-VERSION
chruby: $ ruby-install truffleruby
        $ ruby-build truffleruby-VERSION ~/.rubies/truffleruby-VERSION

JVM Standalone:

rbenv:  $ rbenv install truffleruby+graalvm-VERSION
asdf:   $ asdf install ruby truffleruby+graalvm-VERSION
chruby: $ ruby-install truffleruby-graalvm
        $ ruby-build truffleruby+graalvm-VERSION ~/.rubies/truffleruby+graalvm-VERSION

- uses: ruby/setup-ruby@v1
  with:
    ruby-version: truffleruby # or truffleruby-head or truffleruby+graalvm or truffleruby+graalvm-head

You can use gem and bundle to install gems, as usual.

Please report any issues you might find on GitHub.

Aim

TruffleRuby aims to:

TruffleRuby Runtime Configurations

There are two main runtime configurations of TruffleRuby, Native and JVM, which have different trade-offs.

Configuration:Native (--native, default)JVM (--jvm)
Time to start TruffleRubyabout as fast as MRI startupslower
Time to reach peak performancefasterslower
Peak performance (also considering GC)goodbest
Java host interoperabilityneeds reflection configurationjust works

To find out which runtime configuration is being used, run ruby --version on the command line, or check the value of RUBY_DESCRIPTION or TruffleRuby.native? in Ruby code. Runtime configurations are further detailed in Deploying TruffleRuby.

System Compatibility

TruffleRuby is actively tested on the following systems:

Architectures:

You may find that TruffleRuby will not work if you severely restrict the environment, for example, by unmounting system filesystems such as /dev/shm.

Dependencies

Without these dependencies, many libraries including RubyGems will not work. TruffleRuby will try to print a nice error message if a dependency is missing, but this can only be done on a best effort basis.

You also need to set up a UTF-8 locale if not already done.

See the contributor workflow document if you wish to build TruffleRuby from source.

Current Status

We recommend that people trying TruffleRuby on their gems and applications get in touch with us for any help they might need.

TruffleRuby runs Rails and is compatible with many gems, including C extensions. TruffleRuby is not 100% compatible with MRI 3.2 yet. Please report any compatibility issues you might find. TruffleRuby passes around 97% of ruby/spec, more than any other alternative Ruby implementation.

Regarding performance, TruffleRuby is by far the fastest Ruby implementation on the yjit-bench benchmark suite which includes railsbench, etc. To achieve this performance TruffleRuby needs a fair amount of warmup, as other advanced JIT compilers do. If you find any performance issue, please see this guide.

Releases

TruffleRuby is released at the same time as GraalVM. TruffleRuby continues to use the release numbering based on the calendar year, for example, 21.x, and 22.x., same as GraalVM prior to 2023. See the release roadmap and the upcoming releases list for the release dates and information about how long releases are supported. GraalVM Community Edition releases are supported at most one year. Longer support is available for Oracle GraalVM.

Migration from MRI

TruffleRuby should in most cases work as a drop-in replacement for MRI, but you should read about our compatibility.

Migration from JRuby

For many use cases TruffleRuby should work as a drop-in replacement for JRuby. However, our approach to integration with Java is different to JRuby so you should read our migration guide.

Documentation

Extensive user documentation is available in doc/user.

See our source code repository and contributor documentation to contribute to TruffleRuby. In particular, see the contributor workflow document for how to build and run TruffleRuby.

Contact

The best way to get in touch with us is to join the #truffleruby channel on GraalVM Slack. You can also Tweet to @TruffleRuby, or email benoit.daloze@oracle.com.

Please report security vulnerabilities via the process outlined in the reporting vulnerabilities guide, rather than by something public such as a GitHub issue or a Gitter conversation.

Mailing List

Announcements about GraalVM, including TruffleRuby, are made on the graal-dev mailing list.

Authors

The main authors of TruffleRuby ordered by first contribution are: Chris Seaton, Benoit Daloze, Kevin Menard, Petr Chalupa, Brandon Fish, Duncan MacGregor, Christian Wirth, Rafael França, Alan Wu, Nicolas Laurent, Carol Chen, Nikolay Sverchkov, Lillian Zhang, Tom Stuart, and Maple Ong.

Security

See SECURITY for how to report security vulnerabilities to Oracle. For known vulnerabilities in Ruby, please refer to the known-cves file.

Licence

TruffleRuby is copyright (c) 2013-2024 Oracle and/or its affiliates, and is made available to you under the terms of any one of the following three licenses:

For further licensing information, see LICENCE, 3rd_party_licenses, and doc/legal/legal.

Attribution

TruffleRuby includes infrastructure code from JRuby (e.g. parser, JCodings, Joni), core library code from the Rubinius project, as well as code from the standard implementation of Ruby, MRI.