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Comment by tiffanyh | Hacker News Reader

Note that Rails doesn't work on Truffle and from what I understand, won't anytime soon.

Which is disappointing since it has the highest likelihood of making the biggest impact to Ruby perf.

Huh, what exactly doesn't work? Their own readme says "TruffleRuby runs Rails and is compatible with many gems, including C extensions." (https://github.com/oracle/truffleruby)

Truffle:

  TruffleRuby is not 100% compatible with MRI 3.2 yet

Rails:

  Rails 8 will require Ruby 3.2.0 or newer

https://github.com/oracle/truffleruby

https://rubyonrails.org/2024/9/27/this-week-in-rails

Is it possible that those two statements taken together means truffleruby can run rails 8?

That doesn't mean Rails won't run on TruffleRuby. TruffleRuby may not implement 100% of MRI 3.2, but that doesn't mean it doesn't implement all the parts that Rails needs.

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