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by byroot 1687 days ago

    $ ruby -v
    ruby 3.1.0dev (2021-11-08T09:35:22Z master 7cc4e147fc) [x86_64-darwin21]
    $ ruby --yjit -v
    ruby 3.1.0dev (2021-11-08T09:35:22Z master 7cc4e147fc) +YJIT [x86_64-darwin21]
    $ ruby --yjit -e 'p RubyVM::YJIT.enabled?'
    true
    $ ruby  -e 'p RubyVM::YJIT.enabled?'
    false