TruffleRuby is a high-performance implementation of the Ruby programming language.
TruffleRuby aims to be fully compatible with the standard implementation of Ruby, MRI.
More information is available on the website: http://www.graalvm.org/ruby/
TruffleRuby comes in two standalone modes, native and jvm, for both Oracle GraalVM and Community Edition.
See the documentation for which release asset corresponds to what.

Changelog

New features:

• C/C++ extensions are now compiled using the system toolchain and executed natively instead of using GraalVM LLVM (Sulong). This leads to faster startup, no warmup, better compatibility, smaller distribution and faster installation for C/C++ extensions (#3118, @eregon).
• Full support for the Ruby 3.2 and Ruby 3.3 syntax by adopting the Prism parser, which is about twice as fast as the old parser (#3117, #3038, #3039, @andrykonchin, @eregon).
• Pattern matching is now fully supported (#3332, #2683, @eregon, @razetime).

Bug fixes:

• Fix rb_enc_left_char_head() so it is not always ArgumentError (#3267, @eregon).
• Fix IO.copy_stream with a Tempfile destination (#3280, @eregon).
• Fix Regexp.union negotiating the wrong result encoding (#3287, @nirvdrum, @simonlevasseur).
• Fix Proc#parameters and return all the numbered parameters lower than the used explicitly ones (@andrykonchin).
• Fix some C API functions which were failing when called with Ruby values represented as Java primitives (#3352, @eregon).
• Fix IO.select([io], nil, [io]) on macOS, it was hanging due to a bug in macOS poll(2) (#3346, @eregon, @andrykonchin).
• Run context cleanup such as showing the output of tools when SignalException and Interrupt escape (@eregon).
• Handle a new variable inside the case target expression correctly (#3377, @eregon).
• The arguments of Thread.new(*args, &block) need to be marked as shared between multiple threads (#3179, @eregon).
• Fix Range#bsearch and raise TypeError when range boundaries are non-numeric and block not passed (@andrykonchin).
• Fix using the --cpusampler profiler when there are custom unblock functions for rb_thread_call_without_gvl() (#3013, @eregon).
• Fix recursive raising FrozenError exception when redefined #inspect modifies an object (#3388, @andrykonchin).
• Fix Integer#div returning the wrong object type when the divisor is a Rational (@simonlevasseur, @nirvdrum).
• Remove constant Random::DEFAULT (#3039, @patricklinpl)

Compatibility:

• Add Exception#detailed_message method (#3257, @andrykonchin).
• Fix rb_enc_vsprintf and force String encoding instead of converting it (@andrykonchin).
• Add rb_gc_mark_movable function (@andrykonchin).
• Promote File#path and File#to_path to IO#path and IO#to_path and make IO#new accept an optional path: keyword argument (#3039, @moste00)
• Display "unhandled exception" as the message for RuntimeError instances with an empty message (#3255, @nirvdrum).
• Set RbConfig::CONFIG['configure_args'] for openssl and libyaml (#3170, #3303, @eregon).
• Support Socket.sockaddr_in(port, Socket::INADDR_ANY) (#3361, @mtortonesi).
• Implement the Data class from Ruby 3.2 (#3039, @moste00, @eregon).
• Make Coverage.start and Coverage.result accept parameters (#3149, @mtortonesi, @andrykonchin).
• Implement rb_check_funcall() (@eregon).
• Implement MatchData#{byteoffset,deconstruct,deconstruct_keys} from Ruby 3.2 (#3039, @rwstauner).
• Add Integer#ceildiv method (#3039, @simonlevasseur, @nirvdrum).
• Implement Class#attached_object method (#3039, @andrykonchin).
• Fix ENV#{clone,dup} and raise TypeError (#3039, @andrykonchin).
• Fix Coverage.supported? and raise TypeError if argument is not Symbol (#3039, @andrykonchin).
• Accept options argument to Regexp.{new,compile} of String and warn for unknown types (#3039, @rwstauner).
• Implement Time#deconstruct_keys from Ruby 3.2 (#3039, @rwstauner).
• Do not autosplat a proc that accepts a single positional argument and keywords (#3039, @andrykonchin).
• Support passing anonymous * and ** parameters as method call arguments (#3039, @andrykonchin).
• Handle either positional or keywords arguments by default in Struct.new (#3039, @rwstauner).
• Promote Set class to core library (#3039, @andrykonchin).
• Support connect_timeout keyword argument to TCPSocket.{new,open} (#3421, @manefz, @patricklinpl, @nirvdrum, @rwstauner).
• Add File.lutime and Pathname#lutime methods (#3039, @andrykonchin).
• Add a deprecation warning for Encoding#replicate (#3039, @patricklinpl, @manefz, @nirvdrum).
• Change UnboundMethod#{==,inspect} to use the owner module rather than the origin (#3039, @rwstauner, @manefz, @patricklinpl)
• Support lambda keyword argument in Proc#parameters (#3039, @thomasmarshall, @goyox86).
• Limit maximum encoding set size by 256 (#3039, @thomasmarshall, @goyox86).
• Remove deprecated methods Dir.exists?, File.exists?, and Kernel#=~ (#3039, @patricklinpl, @nirvdrum).
• Remove deprecated FileTest.exists? method (#3039, @andrykonchin).
• Fix {Method,Proc}#parameters and return *, ** and & names for anonymous parameters (@andrykonchin).
• Remove deprecated Fixnum and Bignum constants (#3039, @andrykonchin).
• Add rb_enc_interned_str_cstr function (#3408, @goyox86, @thomasmarshall).
• Add rb_str_to_interned_str function (#3408, @thomasmarshall).

Performance:

• Change the Hash representation from traditional buckets to a "compact hash table" for improved locality, performance and memory footprint (#3172, @moste00).
• Optimize calls with ruby2_keywords forwarding by deciding it per call site instead of per callee thanks to my fix in CRuby 3.2 (@eregon).
• Optimize feature loading when require is called with an absolute path to a .rb file (@rwstauner).
• Avoid extra copies for Strings passed as :string arguments to a FFI call and used later for Regexp matching (#3293, @eregon).