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Many native extensions just work with TruffleRuby, I'd estimate even the majority of the popular native extensions just work. Performance of native extensions is not always good, e…

No it wouldn't.

Thanks for the comment. > Cool, but what about replacing the regexp with straightforward parsing code written manually? If you take a look at the linked snippets of C code, I think…

When did you try? Fixnum/Bignum are gone since many years (before 1.0RC1 which was April 2018, it's all Integer now). So I guess many years ago, and back then TruffleRuby was basic…

Yes, some things are slower. Most of them I'd say are unexpected performance bugs. I'd think most are easy to fix once investigated, but some can be hard to fix (recent example, `F…

Compatibility is certainly an issue for massive codebases, OTOH I think over time TruffleRuby is getting closer and closer to CRuby behavior to the point it would be fairly rare to…

Startup is likely to be worse, because it typically runs a lot of different code for not long and the JIT might not have enough time to optimize much of that. OTOH the JIT needs to…

That second sentence seems a fair assessment. TruffleRuby does support many native (C/C++) extensions so that's rarely an issue. But indeed in such a large codebase it's likely to …

Compatibility is one, it's hard to be 100% compatible with CRuby, and large codebases tend to sometimes depend unintentionally on weird behavior or even bugs in CRuby. Keeping up c…

Actually TruffleRuby optimizes metaprogramming more than any other Ruby implementation. Rails is not the issue, big codebases is the issue: more code = more chances to use somethin…

It's the same benchmark in the blog post, `railsbench`. So TruffleRuby already speeds up some Rails apps like that one but not every Rails app/program. (TruffleRuby 3.27x, YJIT 1.3…

Interesting, I did not know that just calling the original method, even when the refinement method is not used occurs such a cost on CRuby. Seems worth reporting if not already don…

Many popular C extension gems just work. About the only popular C extension I can think of which does not work yet is grpc, and there is work on that. There is a status overview at…

Here is a bit of a critical read of this blog post, from the point of view of alternative Ruby implementations: > instead of having to ship an entire language runtime to production…

I've also found that the Computer Language Benchmarks Game benchmarks tend to be less and less representative of real workloads, due to what the benchmarks do and to the philosophy…

Interesting results, thanks for sharing, that matches my expectations. OptCarrot is probably one of the rare cases where Ruby 3.0+JIT is 3x Ruby 2.0. On most benchmarks, the gains …

I replied to the tweet. At least for TruffleRuby it's to improve testing, no hidden intent. And the PR is by someone not at Oracle, and his interest is to run some Rails app on Tru…

TruffleRuby [can run Rails]( https://speakerdeck.com/eregon/running-rack-and-rails-faster... ), if that is what you refer to.

That's rather vague. But yes, no matter which JIT you always need some extra memory to run the JIT, and it creates a more optimized version while also needing the unoptimized versi…

It's exactly the same thing though, isn't it? I use both terms interchangeably. And it seems the term GIL is better known than GVL.

Which comments?

Seems there isn't any warmup accounted for: https://github.com/kostya/benchmarks/issues/246

FWIW, I ran bench.b locally: MRI: 87.83s TruffleRuby Native 20.0: 18.82s truffleruby-dev Native: 14.09s