![]() To support Zeitwerk of Rails, JIT-ed code is no longer cancelled.The JIT compiler no longer skips compilation of methods longer than 1000 instructions. For workloads like Rails, the default -jit-max-cache is changed from 100 to 10000.See the documentation for details.Īlso, the release includes many bug fixes and performance improvements. The VS Code extension shows a guessed (or explicitly written in an RBS file) method signature above each method definition, draws a red underline under the code that may cause a name error or type error, and completes method names (i.e., shows method candidates). The main update since Ruby 3.0.0 is an experimental IDE support called “TypeProf for IDE”. ![]() It generates a prototype of RBS from non-type-annotated Ruby code. TypeProf is a static type analyzer for Ruby. See the RBS changelog for more information. It includes many bug fixes and performance improvements too.Many signatures for built-in and standard libraries have been added/updated.rbs collection has been introduced to manage gems’ RBSs.Generic type parameters can be bounded.RBS is a language to describe the structure of Ruby programs. The pin operator ( ^) in pattern matching now takes an expression. foo(x:, y:) is syntax sugar for foo(x: x, y: y).Values in Hash literals and keyword arguments can be omitted.You can read the full documentation by pressing Alt+d. If documentation is installed when you select a completion candidate, the documentation dialog will appear next to the completion candidates dialog, showing part of the content. You can use Tab and Shift+Tab to move up and down. The IRB now has an autocomplete feature, where you can just type in the code, and the completion candidates dialog will appear. IRB Autocomplete and Documentation Display See the error_highlight repository for details. You can disable it by using the command-line option -disable-error_highlight. Test.rb:1:in `': undefined method `time' for 1:Integer (NoMethodError) It includes fine-grained error location in backtraces: error_highlight: Fine-grained error location in backtraceĪ built-in gem, error_highlight, has been introduced. debug.gem replaces lib/debug.rb completely. Ruby had bundled lib/debug.rb, but it was not well maintained and it had issues about performance and features. And other useful features like record & replay feature, tracing feature and so on.Support multi-process/multi-thread debugging.Support rich debugging frontend (VS Code and Chrome browser are supported currently).Improve the debugging performance (it does not slow down the application even with the debugger).It is also limited to Unix-like x86-64 platforms for now.Ī completely rewritten debugger debug.gem is bundled. If you want to use this, specify the -yjit command-line option to enable YJIT. YJIT is still an experimental feature, and as such, it is disabled by default. With this technology, YJIT achieves both fast warmup time and performance improvements on most real-world software, up to 22% on railsbench, 39% on liquid-render. See YJIT: a basic block versioning JIT compiler for CRuby for a detailed introduction. With Lazy Basic Block Versioning (LBBV) it first compiles the beginning of a method, and incrementally compiles the rest when the type of arguments and variables are dynamically determined. While MJIT is a method-based JIT compiler and uses an external C compiler, YJIT uses Basic Block Versioning and includes a JIT compiler inside it. YJIT is an important contribution, and aims to improve the performance of Rails applications. Recently Shopify contributed many Ruby improvements to speed up their Rails application. But even though the Optcarrot benchmark has shown impressive speedups, the JIT has not benefited real world business applications. Since Ruby 2.6 introduced MJIT in 2018, its performance greatly improved, and finally we achieved Rub圓x3 last year. Ruby 3.1 merges YJIT, a new in-process JIT compiler developed by Shopify. YJIT: New experimental in-process JIT compiler ![]() Ruby 3.1 keeps compatibility with Ruby 3.0 and also adds many features. ![]() We are pleased to announce the release of Ruby 3.1.0.
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