TruffleRuby is the GraalVM high-performance implementation of the Ruby programming language.
TruffleRuby comes in two distributions:
- Standalone: This only contains TruffleRuby in the Native configuration, making it a smaller download.
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
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
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
bundle to install gems, as usual.
Please report any issues you might find on GitHub.
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.
- 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.
|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
TruffleRuby.native? in Ruby code.
Runtime configurations are further detailed in Deploying TruffleRuby.
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)
- AMD64 (aka
- 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
- make and gcc for building C and C++ extensions
- libssl for the
- libyaml for the
- zlib for the
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.
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
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.
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.
Extensive user documentation is available in
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.
The best way to get in touch with us is to join the
#truffleruby channel on
You can also Tweet to @TruffleRuby, or email
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.
Announcements about GraalVM, including TruffleRuby, are made on the graal-dev mailing list.
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.
See SECURITY for how to report security vulnerabilities to Oracle. For known vulnerabilities in Ruby, please refer to the known-cves file.
TruffleRuby is copyright (c) 2013-2023 Oracle and/or its affiliates, and is made available to you under the terms of any one of the following three licenses:
- 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.
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.