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131 строка
4.2 KiB
Markdown
131 строка
4.2 KiB
Markdown
# NEWS for Ruby 3.3.0
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This document is a list of user-visible feature changes
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since the **3.2.0** release, except for bug fixes.
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Note that each entry is kept to a minimum, see links for details.
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## Language changes
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## Command line options
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* A new `performance` warning category was introduced.
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They are not displayed by default even in verbose mode.
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Turn them on with `-W:performance` or `Warning[:performance] = true`. [[Feature #19538]]
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## Core classes updates
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Note: We're only listing outstanding class updates.
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* Array
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* `Array#pack` now raises ArgumentError for unknown directives. [[Bug #19150]]
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* Dir
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* `Dir.for_fd` added for returning a Dir object for the directory specified
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by the provided directory file descriptor. [[Feature #19347]]
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* `Dir.fchdir` added for changing the directory to the directory specified
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by the provided directory file descriptor. [[Feature #19347]]
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* `Dir#chdir` added for changing the directory to the directory specified
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by the provided `Dir` object. [[Feature #19347]]
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* MatchData
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* MatchData#named_captures now accepts optional `symbolize_names` keyword. [[Feature #19591]]
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* String
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* `String#unpack` now raises ArgumentError for unknown directives. [[Bug #19150]]
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* `String#bytesplice` now accepts new arguments index/length or range of the source string to be copied. [[Feature #19314]]
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* ObjectSpace::WeakKeyMap
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* New core class to build collections with weak references.
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The class use equality semantic to lookup keys like a regular hash,
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but it doesn't hold strong references on the keys. [[Feature #18498]]
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## Stdlib updates
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The following default gems are updated.
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* RubyGems 3.5.0.dev
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* bigdecimal 3.1.4
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* bundler 2.5.0.dev
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* csv 3.2.7
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* fiddle 1.1.2
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* fileutils 1.7.1
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* irb 1.6.4
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* nkf 0.1.3
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* optparse 0.4.0.pre.1
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* psych 5.1.0
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* reline 0.3.4
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* stringio 3.0.7
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* strscan 3.0.7
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* syntax_suggest 1.1.0
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* time 0.2.2
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* timeout 0.3.2
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* uri 0.12.1
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The following bundled gems are updated.
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* minitest 5.18.0
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* test-unit 3.5.9
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* rbs 3.1.0
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* typeprof 0.21.7
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* debug 1.8.0
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See GitHub releases like [Logger](https://github.com/ruby/logger/releases) or
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changelog for details of the default gems or bundled gems.
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## Supported platforms
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## Compatibility issues
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## Stdlib compatibility issues
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### `ext/readline` is retired
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* We have `reline` that is pure Ruby implementation compatible with `ext/readline` API. We rely on `reline` in the future. If you need to use `ext/readline`, you can install `ext/readline` via rubygems.org with `gem install readline-ext`.
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* We no longer need to install libraries like `libreadline` or `libedit`.
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## C API updates
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## Implementation improvements
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* `defined?(@ivar)` is optimized with Object Shapes.
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### YJIT
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* Significant performance improvements over 3.2
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* Splat and rest arguments support has been improved.
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* Registers are allocated for stack operations of the virtual machine.
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* More calls with optional arguments are compiled.
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* `Integer#!=`, `String#!=`, `Kernel#block_given?`, `Kernel#is_a?`,
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`Kernel#instance_of?`, `Module#===` are specially optimized.
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* Instance variables no longer exit to the interpreter
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with megamorphic Object Shapes.
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* Metadata for compiled code uses a lot less memory.
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* Improved code generation on ARM64
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* Option to start YJIT in paused mode and then later enable it manually
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* `--yjit-pause` and `RubyVM::YJIT.resume`
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* This can be used to enable YJIT only once your application is done booting
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* Exit tracing option now supports sampling
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* `--trace-exits-sample-rate=N`
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* Multiple bug fixes
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### RJIT
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* Introduced a pure-Ruby JIT compiler RJIT and replaced MJIT.
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* RJIT supports only x86\_64 architecture on Unix platforms.
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* Unlike MJIT, it doesn't require a C compiler at runtime.
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* RJIT exists only for experimental purposes.
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* You should keep using YJIT in production.
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[Feature #18498]: https://bugs.ruby-lang.org/issues/18498
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[Bug #19150]: https://bugs.ruby-lang.org/issues/19150
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[Feature #19314]: https://bugs.ruby-lang.org/issues/19314
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[Feature #19347]: https://bugs.ruby-lang.org/issues/19347
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[Feature #19538]: https://bugs.ruby-lang.org/issues/19538
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[Feature #19591]: https://bugs.ruby-lang.org/issues/19591
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