There are some syntax enhancements and library changes in Ruby 3.0 as well.<ref name="Ruby 3.0.0 Released"/>
Ruby 3.1 was released on ChristmasDecember Day in25, 2021.<ref name="Ruby 3.1.0 Released" /> It includes YJIT, a new, experimental, Just-In-Time Compiler developed by [[Shopify]], to enhance the performance of real world business applications. A new [[debugger]] is also included. There are some syntax enhancements and other improvements in this release. Network libraries for [[FTP]], [[SMTP]], [[IMAP]], and [[Post Office Protocol|POP]] are moved from default gems to bundled gems.<ref>{{cite web|url=https://www.ruby-lang.org/en/news/2021/12/25/ruby-3-1-0-released//|title=Ruby 3.1.0 Released|access-date=2021-12-26|archive-date=2021-12-26|archive-url=https://web.archive.org/web/20211226065055/https://www.ruby-lang.org/en/news/2021/12/25/ruby-3-1-0-released//|url-status=live}}</ref>
Ruby 3.2 was released on ChristmasDecember Day in25, 2022.<ref name="Ruby 3.2.0 Released">{{Cite web|url=https://www.ruby-lang.org/en/news/2022/12/25/ruby-3-2-0-released/|title=Ruby 3.2.0 Released|access-date=2022-12-25|archive-date=2022-12-25|archive-url=https://web.archive.org/web/20221225084459/https://www.ruby-lang.org/en/news/2022/12/25/ruby-3-2-0-released/|url-status=live}}</ref> It brings support for being run inside of a [[WebAssembly]] environment via a WASI interface. [[Regular expression]]s also receives some improvements, including a faster, [[Memoization|memoized]] matching algorithm to protect against certain [[ReDoS]] attacks, and configurable timeouts for regular expression matching. Additional debugging and syntax features are also included in this release, which include syntax suggestion, as well as error highlighting. The MJIT compiler has been re-implemented as a standard library module, while the YJIT, a [[Rust (programming language)|Rust]]-based [[Just-in-time compilation|JIT]] compiler now supports more architectures on Linux.
Ruby 3.3 was released on December 25, 2023.<ref name="Ruby 3.3.0 Released">{{Cite web|url=https://www.ruby-lang.org/en/news/2023/12/25/ruby-3-3-0-released/|title=Ruby 3.3.0 Released|access-date=2023-12-25|archive-date=2023-12-25|archive-url=https://web.archive.org/web/20231225071449/https://www.ruby-lang.org/en/news/2023/12/25/ruby-3-3-0-released/|url-status=live}}</ref> Ruby 3.3 introduces significant enhancements and performance improvements to the language. Key features include the introduction of the Prism parser for portable and maintainable parsing, the addition of the pure-Ruby JIT compiler RJIT, and major performance boosts in the YJIT compiler. Additionally, improvements in memory usage, the introduction of an M:N thread scheduler, and updates to the standard library contribute to a more efficient and developer-friendly Ruby ecosystem.
