Ruby 4.0.0 additionally introduces ZJIT, a brand new just-in-time compiler supposed to be the subsequent era of YJIT. Constructed into Ruby’s YARV reference implementation, ZJIT is quicker than the interpreter, however not but as quick as YJIT. Builders are inspired to experiment with ZJIT, however perhaps maintain off on deploying it in manufacturing for now. Customers are suggested to remain tuned for Ruby 4.1 ZJIT.
Additionally in Ruby 4.0.0, Ruby’s parallel execution mechanism, Ractor, has obtained enhancements together with a brand new class, Ractor:port, to deal with points pertaining to message sending and receiving, and Ractor.shareable_proc, to make it simpler to share Proc objects between Ractors. For efficiency, many inside knowledge buildings in Ractor have been improved to cut back rivalry on a worldwide lock, thus leading to higher parallelism. Ractors now additionally share much less inside knowledge, leading to much less CPU rivalry when operating in parallel.
Ruby first emerged in 1995. Different options in Ruby 4.0.0 embrace the next:
