TruffleRuby

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

Getting Started

TruffleRuby comes in two distributions:

Standalone: This only contains TruffleRuby in the Native configuration, making it a smaller download.
GraalVM: This includes support for other languages such as JavaScript, Python and R, and supports both the Native and JVM configurations. We recommend that you use a Ruby manager to use TruffleRuby inside GraalVM.

You can install either of those:

Via your Ruby manager/installer (RVM, rbenv, chruby, asdf, ruby-build, ruby-install). We recommend trying TruffleRuby dev builds which contain the latest fixes and improvements (replace VERSION by dev).

Standalone:

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

GraalVM:

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

In CI with GitHub Actions, see Testing TruffleRuby in CI for more details and other CIs.

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

Via Docker. For Standalone see official release images and nightly images. For GraalVM see official release images.
Manually, by following the documentation: Standalone and GraalVM.

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

Please report any issues you might find on GitHub.

Aim

TruffleRuby aims to:

Run idiomatic Ruby code faster.
- TruffleRuby is the fastest Ruby implementation for many CPU-intensive benchmarks.
Run Ruby code in parallel.
- TruffleRuby does not have a global interpreter lock and runs Ruby code in parallel.
Support C extensions.
- Many C extensions work out of the box, including database drivers.
Add fast and low-overhead interoperability with languages like Java, JavaScript, Python, and R.
- Provided by GraalVM, see the Polyglot documentation.
Provide new tooling, such as debuggers and monitoring, that works across languages.
- Includes a profiler, debugger, VisualVM, and more. See the Tools documentation.
Provide all of the above while maintaining very high compatibility with the standard implementation of Ruby.

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 TruffleRuby	about as fast as MRI startup	slower
Time to reach peak performance	faster	slower
Peak performance (also considering GC)	good	best
Java host interoperability	needs reflection configuration	just 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:

Oracle Linux 7, 8
Ubuntu 16.04, 18.04, 20.04, 22.04 (all LTS)
Fedora 35, 36
macOS 10.14 (Mojave), 12 (Monterey)

Architectures:

AMD64 (aka x86_64): Supported
AArch64 (aka arm64): Supported on Linux (from 21.2) and on macOS (from 22.2)

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

make and gcc for building C and C++ extensions
libssl for the openssl C extension
libyaml for the psych C extension
zlib for the zlib C extension

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 3.1 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 has the same version and is released at the same time as GraalVM. See the release roadmap for the release dates and information about how long releases are supported. GraalVM CE releases are supported at most one year. Longer support is available for GraalVM EE.

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.

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

Eclipse Public License version 2.0, or
GNU General Public License version 2, or
GNU Lesser General Public License version 2.1.

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.