Update NEWS.md for 3.3.0 [ci skip]

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-# NEWS for Ruby 3.2.0
+# NEWS for Ruby 3.3.0
 
 This document is a list of user-visible feature changes
-since the **3.1.0** release, except for bug fixes.
+since the **3.2.0** release, except for bug fixes.
 
 Note that each entry is kept to a minimum, see links for details.
 
 ## Language changes
 
-* Anonymous rest and keyword rest arguments can now be passed as
-  arguments, instead of just used in method parameters.
-  [[Feature #18351]]
-
-    ```ruby
-    def foo(*)
-      bar(*)
-    end
-    def baz(**)
-      quux(**)
-    end
-    ```
-
-* A proc that accepts a single positional argument and keywords will
-  no longer autosplat. [[Bug #18633]]
-
-    ```ruby
-    proc{|a, **k| a}.call([1, 2])
-    # Ruby 3.1 and before
-    # => 1
-    # Ruby 3.2 and after
-    # => [1, 2]
-    ```
-
-* Constant assignment evaluation order for constants set on explicit
-  objects has been made consistent with single attribute assignment
-  evaluation order. With this code:
-
-    ```ruby
-    foo::BAR = baz
-    ```
-
-    `foo` is now called before `baz`. Similarly, for multiple assignments
-    to constants,  left-to-right evaluation order is used. With this
-    code:
-
-    ```ruby
-    foo1::BAR1, foo2::BAR2 = baz1, baz2
-    ```
-
-    The following evaluation order is now used:
-
-    1. `foo1`
-    2. `foo2`
-    3. `baz1`
-    4. `baz2`
-
-    [[Bug #15928]]
-
-* "Find pattern" is no longer experimental.
-  [[Feature #18585]]
-
-* Methods taking a rest parameter (like `*args`) and wishing to delegate keyword
-  arguments through `foo(*args)` must now be marked with `ruby2_keywords`
-  (if not already the case). In other words, all methods wishing to delegate
-  keyword arguments through `*args` must now be marked with `ruby2_keywords`,
-  with no exception. This will make it easier to transition to other ways of
-  delegation once a library can require Ruby 3+. Previously, the `ruby2_keywords`
-  flag was kept if the receiving method took `*args`, but this was a bug and an
-  inconsistency. A good technique to find the potentially-missing `ruby2_keywords`
-  is to run the test suite, for where it fails find the last method which must
-  receive keyword arguments, use `puts nil, caller, nil` there, and check each
-  method/block on the call chain which must delegate keywords is correctly marked
-  as `ruby2_keywords`. [[Bug #18625]] [[Bug #16466]]
-
-    ```ruby
-    def target(**kw)
-    end
-
-    # Accidentally worked without ruby2_keywords in Ruby 2.7-3.1, ruby2_keywords
-    # needed in 3.2+. Just like (*args, **kwargs) or (...) would be needed on
-    # both #foo and #bar when migrating away from ruby2_keywords.
-    ruby2_keywords def bar(*args)
-      target(*args)
-    end
-
-    ruby2_keywords def foo(*args)
-      bar(*args)
-    end
-
-    foo(k: 1)
-    ```
-
 ## Core classes updates
 
 Note: We're only listing outstanding class updates.
 
-* Fiber
-
-    * Introduce Fiber.[] and Fiber.[]= for inheritable fiber storage.
-      Introduce Fiber#storage and Fiber#storage= (experimental) for
-      getting and resetting the current storage.  Introduce
-      `Fiber.new(storage:)` for setting the storage when creating a
-      fiber. [[Feature #19078]]
-
-        Existing Thread and Fiber local variables can be tricky to use.
-        Thread-local variables are shared between all fibers, making it
-        hard to isolate, while Fiber-local variables can be hard to
-        share.  It is often desirable to define unit of execution
-        ("execution context") such that some state is shared between all
-        fibers and threads created in that context.  This is what Fiber
-        storage provides.
-
-        ```ruby
-        def log(message)
-          puts "#{Fiber[:request_id]}: #{message}"
-        end
-
-        def handle_requests
-          while request = read_request
-            Fiber.schedule do
-              Fiber[:request_id] = SecureRandom.uuid
-
-              request.messages.each do |message|
-                Fiber.schedule do
-                  log("Handling #{message}") # Log includes inherited request_id.
-                end
-              end
-            end
-          end
-        end
-        ```
-
-        You should generally consider Fiber storage for any state which
-        you want to be shared implicitly between all fibers and threads
-        created in a given context, e.g. a connection pool, a request
-        id, a logger level, environment variables, configuration, etc.
-
-* Fiber::Scheduler
-
-    * Introduce `Fiber::Scheduler#io_select` for non-blocking IO.select.
-      [[Feature #19060]]
-
-* IO
-
-    * Introduce IO#timeout= and IO#timeout which can cause
-      IO::TimeoutError to be raised if a blocking operation exceeds the
-      specified timeout. [[Feature #18630]]
-
-        ```ruby
-        STDIN.timeout = 1
-        STDIN.read # => Blocking operation timed out! (IO::TimeoutError)
-        ```
-
-    * Introduce `IO.new(..., path:)` and promote `File#path` to `IO#path`.
-      [[Feature #19036]]
-
-* Class
-
-    * Class#attached_object, which returns the object for which
-      the receiver is the singleton class. Raises TypeError if the
-      receiver is not a singleton class.
-      [[Feature #12084]]
-
-        ```ruby
-        class Foo; end
-
-        Foo.singleton_class.attached_object        #=> Foo
-        Foo.new.singleton_class.attached_object    #=> #<Foo:0x000000010491a370>
-        Foo.attached_object                        #=> TypeError: `Foo' is not a singleton class
-        nil.singleton_class.attached_object        #=> TypeError: `NilClass' is not a singleton class
-        ```
-
-* Data
-
-    * New core class to represent simple immutable value object. The class is
-      similar to Struct and partially shares an implementation, but has more
-      lean and strict API. [[Feature #16122]]
-
-        ```ruby
-        Measure = Data.define(:amount, :unit)
-        distance = Measure.new(100, 'km')            #=> #<data Measure amount=100, unit="km">
-        weight = Measure.new(amount: 50, unit: 'kg') #=> #<data Measure amount=50, unit="kg">
-        weight.with(amount: 40)                      #=> #<data Measure amount=40, unit="kg">
-        weight.amount                                #=> 50
-        weight.amount = 40                           #=> NoMethodError: undefined method `amount='
-        ```
-
-* Encoding
-
-    * Encoding#replicate has been deprecated and will be removed in 3.3. [[Feature #18949]]
-    * The dummy `Encoding::UTF_16` and `Encoding::UTF_32` encodings no longer
-      try to dynamically guess the endian based on a byte order mark.
-      Use `Encoding::UTF_16BE`/`UTF_16LE` and `Encoding::UTF_32BE`/`UTF_32LE` instead.
-      This change speeds up getting the encoding of a String. [[Feature #18949]]
-    * Limit maximum encoding set size by 256.
-      If exceeding maximum size, `EncodingError` will be raised. [[Feature #18949]]
-
-* Enumerator
-
-    * Enumerator.product has been added.  Enumerator::Product is the implementation. [[Feature #18685]]
-
-* Exception
-
-    * Exception#detailed_message has been added.
-      The default error printer calls this method on the Exception object
-      instead of #message. [[Feature #18564]]
-
-* Hash
-
-    * Hash#shift now always returns nil if the hash is
-      empty, instead of returning the default value or
-      calling the default proc. [[Bug #16908]]
-
-* Integer
-
-    * Integer#ceildiv has been added. [[Feature #18809]]
-
-* Kernel
-
-    * Kernel#binding raises RuntimeError if called from a non-Ruby frame
-      (such as a method defined in C). [[Bug #18487]]
-
-* MatchData
-
-    * MatchData#byteoffset has been added. [[Feature #13110]]
-    * MatchData#deconstruct has been added. [[Feature #18821]]
-    * MatchData#deconstruct_keys has been added. [[Feature #18821]]
-
-* Module
-
-    * Module.used_refinements has been added. [[Feature #14332]]
-    * Module#refinements has been added. [[Feature #12737]]
-    * Module#const_added has been added. [[Feature #17881]]
-    * Module#undefined_instance_methods has been added. [[Feature #12655]]
-
-* Proc
-
-    * Proc#dup returns an instance of subclass. [[Bug #17545]]
-    * Proc#parameters now accepts lambda keyword. [[Feature #15357]]
-
-* Process
-    * Added `RLIMIT_NPTS` constant to FreeBSD platform
-
-* Regexp
-
-    * The cache-based optimization is introduced.
-      Many (but not all) Regexp matching is now in linear time, which
-      will prevent regular expression denial of service (ReDoS)
-      vulnerability. [[Feature #19104]]
-
-    * Regexp.linear_time? is introduced. [[Feature #19194]]
-
-    * Regexp.new now supports passing the regexp flags not only as an Integer,
-      but also as a String.  Unknown flags raise ArgumentError.
-      Otherwise, anything other than `true`, `false`, `nil` or Integer will be warned.
-      [[Feature #18788]]
-
-    * Regexp.timeout= has been added. Also, Regexp.new new supports timeout keyword.
-      See [[Feature #17837]]
-
-* Refinement
-
-    * Refinement#refined_class has been added. [[Feature #12737]]
-
-* RubyVM::AbstractSyntaxTree
-
-    * Add `error_tolerant` option for `parse`, `parse_file` and `of`. [[Feature #19013]]
-      With this option
-
-        1. SyntaxError is suppressed
-        2. AST is returned for invalid input
-        3. `end` is complemented when a parser reaches to the end of input but `end` is insufficient
-        4. `end` is treated as keyword based on indent
-
-        ```ruby
-        # Without error_tolerant option
-        root = RubyVM::AbstractSyntaxTree.parse(<<~RUBY)
-        def m
-          a = 10
-          if
-        end
-        RUBY
-        # => <internal:ast>:33:in `parse': syntax error, unexpected `end' (SyntaxError)
-
-        # With error_tolerant option
-        root = RubyVM::AbstractSyntaxTree.parse(<<~RUBY, error_tolerant: true)
-        def m
-          a = 10
-          if
-        end
-        RUBY
-        p root # => #<RubyVM::AbstractSyntaxTree::Node:SCOPE@1:0-4:3>
-
-        # `end` is treated as keyword based on indent
-        root = RubyVM::AbstractSyntaxTree.parse(<<~RUBY, error_tolerant: true)
-        module Z
-          class Foo
-            foo.
-          end
-
-          def bar
-          end
-        end
-        RUBY
-        p root.children[-1].children[-1].children[-1].children[-2..-1]
-        # => [#<RubyVM::AbstractSyntaxTree::Node:CLASS@2:2-4:5>, #<RubyVM::AbstractSyntaxTree::Node:DEFN@6:2-7:5>]
-        ```
-
-    * Add `keep_tokens` option for `parse`, `parse_file` and `of`. Add `#tokens` and `#all_tokens`
-      for RubyVM::AbstractSyntaxTree::Node [[Feature #19070]]
-
-        ```ruby
-        root = RubyVM::AbstractSyntaxTree.parse("x = 1 + 2", keep_tokens: true)
-        root.tokens # => [[0, :tIDENTIFIER, "x", [1, 0, 1, 1]], [1, :tSP, " ", [1, 1, 1, 2]], ...]
-        root.tokens.map{_1[2]}.join # => "x = 1 + 2"
-        ```
-
-* Set
-
-    * Set is now available as a built-in class without the need for `require "set"`. [[Feature #16989]]
-      It is currently autoloaded via the Set constant or a call to Enumerable#to_set.
-
-* String
-
-    * String#byteindex and String#byterindex have been added. [[Feature #13110]]
-    * Update Unicode to Version 15.0.0 and Emoji Version 15.0. [[Feature #18639]]
-      (also applies to Regexp)
-    * String#bytesplice has been added.  [[Feature #18598]]
-    * String#dedup has been added as an alias to String#-@.  [[Feature #18595]]
-
-* Struct
-
-    * A Struct class can also be initialized with keyword arguments
-      without `keyword_init: true` on Struct.new [[Feature #16806]]
-
-        ```ruby
-        Post = Struct.new(:id, :name)
-        Post.new(1, "hello") #=> #<struct Post id=1, name="hello">
-        # From Ruby 3.2, the following code also works without keyword_init: true.
-        Post.new(id: 1, name: "hello") #=> #<struct Post id=1, name="hello">
-        ```
-
-* Thread
-
-    * Thread.each_caller_location is added. [[Feature #16663]]
-
-* Thread::Queue
-
-    * Thread::Queue#pop(timeout: sec) is added. [[Feature #18774]]
-
-* Thread::SizedQueue
-
-    * Thread::SizedQueue#pop(timeout: sec) is added. [[Feature #18774]]
-    * Thread::SizedQueue#push(timeout: sec) is added. [[Feature #18944]]
-
-* Time
-
-    * Time#deconstruct_keys is added, allowing to use Time instances
-      in pattern-matching expressions [[Feature #19071]]
-
-    * Time.new now can parse a string like generated by Time#inspect
-      and return a Time instance based on the given argument.
-      [[Feature #18033]]
-
-* SyntaxError
-    * SyntaxError#path has been added.  [[Feature #19138]]
-
-* TracePoint
-
-    * TracePoint#binding now returns `nil` for `c_call`/`c_return` TracePoints.
-      [[Bug #18487]]
-    * TracePoint#enable `target_thread` keyword argument now defaults to the
-      current thread if a block is given and `target` and `target_line` keyword
-      arguments are not passed. [[Bug #16889]]
-
-* UnboundMethod
-
-    * `UnboundMethod#==` returns `true` if the actual method is same. For example,
-      `String.instance_method(:object_id) == Array.instance_method(:object_id)`
-      returns `true`. [[Feature #18798]]
-
-    * `UnboundMethod#inspect` does not show the receiver of `instance_method`.
-      For example `String.instance_method(:object_id).inspect` returns
-      `"#<UnboundMethod: Kernel#object_id()>"`
-      (was `"#<UnboundMethod: String(Kernel)#object_id()>"`).
-
-* GC
-
-    * Expose `need_major_gc` via `GC.latest_gc_info`. [GH-6791]
-
-* ObjectSpace
-
-    * `ObjectSpace.dump_all` dump shapes as well. [GH-6868]
-
 ## Stdlib updates
 
-* Bundler
-
-    * Bundler now uses [PubGrub] resolver instead of [Molinillo] for performance improvement.
-    * Add --ext=rust support to bundle gem for creating simple gems with Rust extensions.
-      [[GH-rubygems-6149]]
-    * Make cloning git repos faster [[GH-rubygems-4475]]
-
-* RubyGems
-
-    * Add mswin support for cargo builder. [[GH-rubygems-6167]]
-
-* CGI
-
-    * `CGI.escapeURIComponent` and `CGI.unescapeURIComponent` are added.
-      [[Feature #18822]]
-
-* Coverage
-
-    * `Coverage.setup` now accepts `eval: true`. By this, `eval` and related methods are
-      able to generate code coverage. [[Feature #19008]]
-
-    * `Coverage.supported?(mode)` enables detection of what coverage modes are
-      supported. [[Feature #19026]]
-
-* Date
-
-    * Added `Date#deconstruct_keys` and `DateTime#deconstruct_keys` same as [[Feature #19071]]
-
-* ERB
-
-    * `ERB::Util.html_escape` is made faster than `CGI.escapeHTML`.
-        * It no longer allocates a String object when no character needs to be escaped.
-        * It skips calling `#to_s` method when an argument is already a String.
-        * `ERB::Escape.html_escape` is added as an alias to `ERB::Util.html_escape`,
-          which has not been monkey-patched by Rails.
-    * `ERB::Util.url_encode` is made faster using `CGI.escapeURIComponent`.
-    * `-S` option is removed from `erb` command.
-
-* FileUtils
-
-    * Add FileUtils.ln_sr method and `relative:` option to FileUtils.ln_s.
-      [[Feature #18925]]
-
-* IRB
-
-    * debug.gem integration commands have been added: `debug`, `break`, `catch`,
-      `next`, `delete`, `step`, `continue`, `finish`, `backtrace`, `info`
-        * They work even if you don't have `gem "debug"` in your Gemfile.
-        * See also: [What's new in Ruby 3.2's IRB?](https://st0012.dev/whats-new-in-ruby-3-2-irb)
-    * More Pry-like commands and features have been added.
-        * `edit` and `show_cmds` (like Pry's `help`) are added.
-        * `ls` takes `-g` or `-G` option to filter out outputs.
-        * `show_source` is aliased from `$` and accepts unquoted inputs.
-        * `whereami` is aliased from `@`.
-
-* Net::Protocol
-
-    * Improve `Net::BufferedIO` performance. [[GH-net-protocol-14]]
-
-* Pathname
-
-    * Added `Pathname#lutime`. [[GH-pathname-20]]
-
-* Socket
-
-    * Added the following constants for supported platforms.
-        * `SO_INCOMING_CPU`
-        * `SO_INCOMING_NAPI_ID`
-        * `SO_RTABLE`
-        * `SO_SETFIB`
-        * `SO_USER_COOKIE`
-        * `TCP_KEEPALIVE`
-        * `TCP_CONNECTION_INFO`
-
-* SyntaxSuggest
-
-    * The feature of `syntax_suggest` formerly `dead_end` is integrated in Ruby.
-      [[Feature #18159]]
-
-* UNIXSocket
-
-    * Add support for UNIXSocket on Windows. Emulate anonymous sockets. Add
-      support for File.socket? and File::Stat#socket? where possible.
-      [[Feature #19135]]
-
 *   The following default gems are updated.
 
-    * RubyGems 3.4.1
-    * abbrev 0.1.1
-    * benchmark 0.2.1
-    * bigdecimal 3.1.3
-    * bundler 2.4.1
-    * cgi 0.3.6
-    * csv 3.2.6
-    * date 3.3.3
-    * delegate 0.3.0
-    * did_you_mean 1.6.3
-    * digest 3.1.1
-    * drb 2.1.1
-    * english 0.7.2
-    * erb 4.0.2
-    * error_highlight 0.5.1
-    * etc 1.4.2
-    * fcntl 1.0.2
-    * fiddle 1.1.1
-    * fileutils 1.7.0
-    * forwardable 1.3.3
-    * getoptlong 0.2.0
-    * io-console 0.6.0
-    * io-nonblock 0.2.0
-    * io-wait 0.3.0
-    * ipaddr 1.2.5
-    * irb 1.6.2
-    * json 2.6.3
-    * logger 1.5.3
-    * mutex_m 0.1.2
-    * net-http 0.3.2
-    * net-protocol 0.2.1
-    * nkf 0.1.2
-    * open-uri 0.3.0
-    * open3 0.1.2
-    * openssl 3.1.0
-    * optparse 0.3.1
-    * ostruct 0.5.5
-    * pathname 0.2.1
-    * pp 0.4.0
-    * pstore 0.1.2
-    * psych 5.0.1
-    * racc 1.6.2
-    * rdoc 6.5.0
-    * readline-ext 0.1.5
-    * reline 0.3.2
-    * resolv 0.2.2
-    * resolv-replace 0.1.1
-    * securerandom 0.2.2
-    * set 1.0.3
-    * stringio 3.0.4
-    * strscan 3.0.5
-    * syntax_suggest 1.0.2
-    * syslog 0.1.1
-    * tempfile 0.1.3
-    * time 0.2.1
-    * timeout 0.3.1
-    * tmpdir 0.1.3
-    * tsort 0.1.1
-    * un 0.2.1
-    * uri 0.12.0
-    * weakref 0.1.2
-    * win32ole 1.8.9
-    * yaml 0.2.1
-    * zlib 3.0.0
-
 *   The following bundled gems are updated.
 
-    * minitest 5.16.3
-    * power_assert 2.0.3
-    * test-unit 3.5.7
-    * net-ftp 0.2.0
-    * net-imap 0.3.4
-    * net-pop 0.1.2
-    * net-smtp 0.3.3
-    * rbs 2.8.2
-    * typeprof 0.21.3
-    * debug 1.7.1
-
 See GitHub releases like [GitHub Releases of Logger](https://github.com/ruby/logger/releases) or changelog for details of the default gems or bundled gems.
 
 ## Supported platforms
 
-* WebAssembly/WASI is added. See [wasm/README.md] and [ruby.wasm] for more details. [[Feature #18462]]
-
 ## Compatibility issues
 
-* `String#to_c` currently treat a sequence of underscores as an end of Complex
-  string. [[Bug #19087]]
-
-* Now `ENV.clone` raises `TypeError` as well as `ENV.dup` [[Bug #17767]]
-
-### Removed constants
-
-The following deprecated constants are removed.
-
-* `Fixnum` and `Bignum` [[Feature #12005]]
-* `Random::DEFAULT` [[Feature #17351]]
-* `Struct::Group`
-* `Struct::Passwd`
-
-### Removed methods
-
-The following deprecated methods are removed.
-
-* `Dir.exists?` [[Feature #17391]]
-* `File.exists?` [[Feature #17391]]
-* `Kernel#=~` [[Feature #15231]]
-* `Kernel#taint`, `Kernel#untaint`, `Kernel#tainted?`
-  [[Feature #16131]]
-* `Kernel#trust`, `Kernel#untrust`, `Kernel#untrusted?`
-  [[Feature #16131]]
-* `Method#public?`, `Method#private?`, `Method#protected?`,
-  `UnboundMethod#public?`, `UnboundMethod#private?`, `UnboundMethod#protected?`
-  [[Bug #18729]] [[Bug #18751]] [[Bug #18435]]
-
-### Source code incompatibility of extension libraries
-
-* Extension libraries provide PRNG, subclasses of Random, need updates.
-  See [PRNG update] below for more information. [[Bug #19100]]
-
-### Error printer
-
-* Ruby no longer escapes control characters and backslashes in an
-  error message. [[Feature #18367]]
-
-### Constant lookup when defining a class/module
-
-* When defining a class/module directly under the Object class by class/module
-  statement, if there is already a class/module defined by `Module#include`
-  with the same name, the statement was handled as "open class" in Ruby 3.1 or before.
-  Since Ruby 3.2, a new class is defined instead. [[Feature #18832]]
-
 ## Stdlib compatibility issues
 
-* Psych no longer bundles libyaml sources.
-  And also Fiddle no longer bundles libffi sources.
-  Users need to install the libyaml/libffi library themselves via the package
-  manager like apt, yum, brew, etc.
-
-    Psych and fiddle supported the static build with specific version of libyaml
-    and libffi sources. You can build psych with libyaml-0.2.5 like this.
-
-    ```bash
-    $ ./configure --with-libyaml-source-dir=/path/to/libyaml-0.2.5
-    ```
-
-    And you can build fiddle with libffi-3.4.4 like this.
-
-    ```bash
-    $ ./configure --with-libffi-source-dir=/path/to/libffi-3.4.4
-    ```
-
-    [[Feature #18571]]
-
-* Check cookie name/path/domain characters in `CGI::Cookie`. [[CVE-2021-33621]]
-
-* `URI.parse` return empty string in host instead of nil. [[sec-156615]]
-
 ## C API updates
 
-### Updated C APIs
-
-The following APIs are updated.
-
-* PRNG update
-
-    `rb_random_interface_t` in ruby/random.h updated and versioned.
-    Extension libraries which use this interface and built for older
-    versions need to rebuild with adding `init_int32` function.
-
-### Added C APIs
-
-* `VALUE rb_hash_new_capa(long capa)` was added to created hashes with the desired capacity.
-* `rb_internal_thread_add_event_hook` and `rb_internal_thread_add_event_hook` were added to instrument threads scheduling.
-  The following events are available:
-    * `RUBY_INTERNAL_THREAD_EVENT_STARTED`
-    * `RUBY_INTERNAL_THREAD_EVENT_READY`
-    * `RUBY_INTERNAL_THREAD_EVENT_RESUMED`
-    * `RUBY_INTERNAL_THREAD_EVENT_SUSPENDED`
-    * `RUBY_INTERNAL_THREAD_EVENT_EXITED`
-* `rb_debug_inspector_current_depth` and `rb_debug_inspector_frame_depth` are added for debuggers.
-
-### Removed C APIs
-
-The following deprecated APIs are removed.
-
-* `rb_cData` variable.
-* "taintedness" and "trustedness" functions. [[Feature #16131]]
-
 ## Implementation improvements
 
-* Fixed several race conditions in Kernel#autoload. [[Bug #18782]]
-* Cache invalidation for expressions referencing constants is now
-  more fine-grained. `RubyVM.stat(:global_constant_state)` was
-  removed because it was closely tied to the previous caching scheme
-  where setting any constant invalidates all caches in the system.
-  New keys, `:constant_cache_invalidations` and `:constant_cache_misses`,
-  were introduced to help with use cases for `:global_constant_state`.
-  [[Feature #18589]]
-* The cache-based optimization for Regexp matching is introduced.
-  [[Feature #19104]]
-* [Variable Width Allocation](https://shopify.engineering/ruby-variable-width-allocation)
-  is now enabled by default. [[Feature #18239]]
-* Added a new instance variable caching mechanism, called object shapes, which
-  improves inline cache hits for most objects and allows us to generate very
-  efficient JIT code. Objects whose instance variables are defined in a
-  consistent order will see the most performance benefits.
-  [[Feature #18776]]
-* Speed up marking instruction sequences by using a bitmap to find "markable"
-  objects.  This change results in faster major collections.
-  [[Feature #18875]]
-
 ## JIT
-
-### YJIT
-
-* YJIT is no longer experimental
-    * Has been tested on production workloads for over a year and proven to be quite stable.
-* YJIT now supports both x86-64 and arm64/aarch64 CPUs on Linux, MacOS, BSD and other UNIX platforms.
-    * This release brings support for Mac M1/M2, AWS Graviton and Raspberry Pi 4.
-* Building YJIT now requires Rust 1.58.0+. [[Feature #18481]]
-    * In order to ensure that CRuby is built with YJIT, please install `rustc` >= 1.58.0
-      before running `./configure`
-    * Please reach out to the YJIT team should you run into any issues.
-* Physical memory for JIT code is lazily allocated. Unlike Ruby 3.1,
-  the RSS of a Ruby process is minimized because virtual memory pages
-  allocated by `--yjit-exec-mem-size` will not be mapped to physical
-  memory pages until actually utilized by JIT code.
-* Introduce Code GC that frees all code pages when the memory consumption
-  by JIT code reaches `--yjit-exec-mem-size`.
-    * `RubyVM::YJIT.runtime_stats` returns Code GC metrics in addition to
-      existing `inline_code_size` and `outlined_code_size` keys:
-      `code_gc_count`, `live_page_count`, `freed_page_count`, and `freed_code_size`.
-* Most of the statistics produced by `RubyVM::YJIT.runtime_stats` are now available in release builds.
-    * Simply run ruby with `--yjit-stats` to compute and dump stats (incurs some run-time overhead).
-* YJIT is now optimized to take advantage of object shapes. [[Feature #18776]]
-* Take advantage of finer-grained constant invalidation to invalidate less code when defining new constants. [[Feature #18589]]
-* The default `--yjit-exec-mem-size` is changed to 64 (MiB).
-* The default `--yjit-call-threshold` is changed to 30.
-
-### MJIT
-
-* The MJIT compiler is re-implemented in Ruby as `ruby_vm/mjit/compiler`.
-* MJIT compiler is executed under a forked Ruby process instead of
-  doing it in a native thread called MJIT worker. [[Feature #18968]]
-    * As a result, Microsoft Visual Studio (MSWIN) is no longer supported.
-* MinGW is no longer supported. [[Feature #18824]]
-* Rename `--mjit-min-calls` to `--mjit-call-threshold`.
-* Change default `--mjit-max-cache` back from 10000 to 100.
-
-[Feature #12005]:     https://bugs.ruby-lang.org/issues/12005
-[Feature #12084]:     https://bugs.ruby-lang.org/issues/12084
-[Feature #12655]:     https://bugs.ruby-lang.org/issues/12655
-[Feature #12737]:     https://bugs.ruby-lang.org/issues/12737
-[Feature #13110]:     https://bugs.ruby-lang.org/issues/13110
-[Feature #14332]:     https://bugs.ruby-lang.org/issues/14332
-[Feature #15231]:     https://bugs.ruby-lang.org/issues/15231
-[Feature #15357]:     https://bugs.ruby-lang.org/issues/15357
-[Bug #15928]:         https://bugs.ruby-lang.org/issues/15928
-[Feature #16122]:     https://bugs.ruby-lang.org/issues/16122
-[Feature #16131]:     https://bugs.ruby-lang.org/issues/16131
-[Bug #16466]:         https://bugs.ruby-lang.org/issues/16466
-[Feature #16663]:     https://bugs.ruby-lang.org/issues/16663
-[Feature #16806]:     https://bugs.ruby-lang.org/issues/16806
-[Bug #16889]:         https://bugs.ruby-lang.org/issues/16889
-[Bug #16908]:         https://bugs.ruby-lang.org/issues/16908
-[Feature #16989]:     https://bugs.ruby-lang.org/issues/16989
-[Feature #17351]:     https://bugs.ruby-lang.org/issues/17351
-[Feature #17391]:     https://bugs.ruby-lang.org/issues/17391
-[Bug #17545]:         https://bugs.ruby-lang.org/issues/17545
-[Bug #17767]:         https://bugs.ruby-lang.org/issues/17767
-[Feature #17837]:     https://bugs.ruby-lang.org/issues/17837
-[Feature #17881]:     https://bugs.ruby-lang.org/issues/17881
-[Feature #18033]:     https://bugs.ruby-lang.org/issues/18033
-[Feature #18159]:     https://bugs.ruby-lang.org/issues/18159
-[Feature #18239]:     https://bugs.ruby-lang.org/issues/18239#note-17
-[Feature #18351]:     https://bugs.ruby-lang.org/issues/18351
-[Feature #18367]:     https://bugs.ruby-lang.org/issues/18367
-[Bug #18435]:         https://bugs.ruby-lang.org/issues/18435
-[Feature #18462]:     https://bugs.ruby-lang.org/issues/18462
-[Feature #18481]:     https://bugs.ruby-lang.org/issues/18481
-[Bug #18487]:         https://bugs.ruby-lang.org/issues/18487
-[Feature #18564]:     https://bugs.ruby-lang.org/issues/18564
-[Feature #18571]:     https://bugs.ruby-lang.org/issues/18571
-[Feature #18585]:     https://bugs.ruby-lang.org/issues/18585
-[Feature #18589]:     https://bugs.ruby-lang.org/issues/18589
-[Feature #18595]:     https://bugs.ruby-lang.org/issues/18595
-[Feature #18598]:     https://bugs.ruby-lang.org/issues/18598
-[Bug #18625]:         https://bugs.ruby-lang.org/issues/18625
-[Feature #18630]:     https://bugs.ruby-lang.org/issues/18630
-[Bug #18633]:         https://bugs.ruby-lang.org/issues/18633
-[Feature #18639]:     https://bugs.ruby-lang.org/issues/18639
-[Feature #18685]:     https://bugs.ruby-lang.org/issues/18685
-[Bug #18729]:         https://bugs.ruby-lang.org/issues/18729
-[Bug #18751]:         https://bugs.ruby-lang.org/issues/18751
-[Feature #18774]:     https://bugs.ruby-lang.org/issues/18774
-[Feature #18776]:     https://bugs.ruby-lang.org/issues/18776
-[Bug #18782]:         https://bugs.ruby-lang.org/issues/18782
-[Feature #18788]:     https://bugs.ruby-lang.org/issues/18788
-[Feature #18798]:     https://bugs.ruby-lang.org/issues/18798
-[Feature #18809]:     https://bugs.ruby-lang.org/issues/18809
-[Feature #18821]:     https://bugs.ruby-lang.org/issues/18821
-[Feature #18822]:     https://bugs.ruby-lang.org/issues/18822
-[Feature #18824]:     https://bugs.ruby-lang.org/issues/18824
-[Feature #18832]:     https://bugs.ruby-lang.org/issues/18832
-[Feature #18875]:     https://bugs.ruby-lang.org/issues/18875
-[Feature #18925]:     https://bugs.ruby-lang.org/issues/18925
-[Feature #18944]:     https://bugs.ruby-lang.org/issues/18944
-[Feature #18949]:     https://bugs.ruby-lang.org/issues/18949
-[Feature #18968]:     https://bugs.ruby-lang.org/issues/18968
-[Feature #19008]:     https://bugs.ruby-lang.org/issues/19008
-[Feature #19013]:     https://bugs.ruby-lang.org/issues/19013
-[Feature #19026]:     https://bugs.ruby-lang.org/issues/19026
-[Feature #19036]:     https://bugs.ruby-lang.org/issues/19036
-[Feature #19060]:     https://bugs.ruby-lang.org/issues/19060
-[Feature #19070]:     https://bugs.ruby-lang.org/issues/19070
-[Feature #19071]:     https://bugs.ruby-lang.org/issues/19071
-[Feature #19078]:     https://bugs.ruby-lang.org/issues/19078
-[Bug #19087]:         https://bugs.ruby-lang.org/issues/19087
-[Bug #19100]:         https://bugs.ruby-lang.org/issues/19100
-[Feature #19104]:     https://bugs.ruby-lang.org/issues/19104
-[Feature #19135]:     https://bugs.ruby-lang.org/issues/19135
-[Feature #19138]:     https://bugs.ruby-lang.org/issues/19138
-[Feature #19194]:     https://bugs.ruby-lang.org/issues/19194
-[Molinillo]:          https://github.com/CocoaPods/Molinillo
-[PubGrub]:            https://github.com/jhawthorn/pub_grub
-[GH-net-protocol-14]: https://github.com/ruby/net-protocol/pull/14
-[GH-pathname-20]:     https://github.com/ruby/pathname/pull/20
-[GH-6791]:            https://github.com/ruby/ruby/pull/6791
-[GH-6868]:            https://github.com/ruby/ruby/pull/6868
-[GH-rubygems-4475]:   https://github.com/rubygems/rubygems/pull/4475
-[GH-rubygems-6149]:   https://github.com/rubygems/rubygems/pull/6149
-[GH-rubygems-6167]:   https://github.com/rubygems/rubygems/pull/6167
-[sec-156615]:         https://hackerone.com/reports/156615
-[CVE-2021-33621]:     https://www.ruby-lang.org/en/news/2022/11/22/http-response-splitting-in-cgi-cve-2021-33621/
-[wasm/README.md]:     https://github.com/ruby/ruby/blob/master/wasm/README.md
-[ruby.wasm]:          https://github.com/ruby/ruby.wasm