Skip to content

Commit e558f0d

Browse files
riseshiariseshia
committed
cp {en,ko}/news/_posts/2024-12-25-ruby-3-4-0-released.md
1 parent 7fb2fd2 commit e558f0d

File tree

1 file changed

+345
-0
lines changed

1 file changed

+345
-0
lines changed

‎ko/news/_posts/2024-12-25-ruby-3-4-0-released.md

+345
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,345 @@
1+
---
2+
layout: news_post
3+
title: "Ruby 3.4.0 Released"
4+
author: "naruse"
5+
translator:
6+
date: 2024-12-25 00:00:00 +0000
7+
lang: en
8+
---
9+
10+
{% assign release = site.data.releases | where: "version", "3.4.0" | first %}
11+
We are pleased to announce the release of Ruby {{ release.version }}. Ruby 3.4 adds `it` block parameter reference,
12+
change Prism as default parser, adds Happy Eyeballs Version 2 support to socket library, improves YJIT,
13+
adds Modular GC, and so on.
14+
15+
## `it` is introduced
16+
17+
`it` is added to reference a block parameter with no variable name. [[Feature #18980]]
18+
19+
```ruby
20+
ary = ["foo", "bar", "baz"]
21+
22+
p ary.map { it.upcase } #=> ["FOO", "BAR", "BAZ"]
23+
```
24+
25+
`it` very much behaves the same as `_1`. When the intention is to only use `_1` in a block, the potential for other numbered parameters such as `_2` to also appear imposes an extra cognitive load onto readers. So `it` was introduced as a handy alias. Use `it` in simple cases where `it` speaks for itself, such as in one-line blocks.
26+
27+
## Prism is now the default parser
28+
29+
Switch the default parser from parse.y to Prism. [[Feature #20564]]
30+
31+
This is an internal improvement and there should be little change visible to the user. If you notice any compatibility issues, please report them to us.
32+
33+
To use the conventional parser, use the command-line argument `--parser=parse.y`.
34+
35+
## The socket library now features Happy Eyeballs Version 2 (RFC 8305)
36+
37+
The socket library now features [Happy Eyeballs Version 2 (RFC 8305)](https://datatracker.ietf.org/doc/html/rfc8305), the latest standardized version of a widely adopted approach for better connectivity in many programming languages, in `TCPSocket.new` (`TCPSocket.open`) and `Socket.tcp`.
38+
This improvement enables Ruby to provide efficient and reliable network connections, adapted to modern internet environments.
39+
40+
Until Ruby 3.3, these methods performed name resolution and connection attempts serially. With this algorithm, they now operate as follows:
41+
42+
1. Performs IPv6 and IPv4 name resolution concurrently
43+
2. Attempt connections to the resolved IP addresses, prioritizing IPv6, with parallel attempts staggered at 250ms intervals
44+
3. Return the first successful connection while canceling any others
45+
46+
This ensures minimized connection delays, even if a specific protocol or IP address is delayed or unavailable.
47+
This feature is enabled by default, so additional configuration is not required to use it. To disable it globally, set the environment variable `RUBY_TCP_NO_FAST_FALLBACK=1` or call `Socket.tcp_fast_fallback=false`. Or to disable it on a per-method basis, use the keyword argument `fast_fallback: false`.
48+
49+
## YJIT
50+
51+
### TL;DR
52+
53+
* Better performance across most benchmarks on both x86-64 and arm64 platforms.
54+
* Reduced memory usage through compressed metadata and a unified memory limit.
55+
* Various bug fixes: YJIT is now more robust and thoroughly tested.
56+
57+
### New features
58+
59+
* Command-line options
60+
* `--yjit-mem-size` introduces a unified memory limit (default 128MiB) to track total YJIT memory usage,
61+
providing a more intuitive alternative to the old `--yjit-exec-mem-size` option.
62+
* `--yjit-log` enables a compilation log to track what gets compiled.
63+
* Ruby API
64+
* `RubyVM::YJIT.log` provides access to the tail of the compilation log at run-time.
65+
* YJIT stats
66+
* `RubyVM::YJIT.runtime_stats` now always provides additional statistics on
67+
invalidation, inlining, and metadata encoding.
68+
69+
### New optimizations
70+
71+
* Compressed context reduces memory needed to store YJIT metadata
72+
* Allocate registers for local variables and Ruby method arguments
73+
* When YJIT is enabled, use more Core primitives written in Ruby:
74+
* `Array#each`, `Array#select`, `Array#map` rewritten in Ruby for better performance [[Feature #20182]].
75+
* Ability to inline small/trivial methods such as:
76+
* Empty methods
77+
* Methods returning a constant
78+
* Methods returning `self`
79+
* Methods directly returning an argument
80+
* Specialized codegen for many more runtime methods
81+
* Optimize `String#getbyte`, `String#setbyte` and other string methods
82+
* Optimize bitwise operations to speed up low-level bit/byte manipulation
83+
* Support shareable constants in multi-ractor mode
84+
* Various other incremental optimizations
85+
86+
## Modular GC
87+
88+
* Alternative garbage collector (GC) implementations can be loaded dynamically
89+
through the modular garbage collector feature. To enable this feature,
90+
configure Ruby with `--with-modular-gc` at build time. GC libraries can be
91+
loaded at runtime using the environment variable `RUBY_GC_LIBRARY`.
92+
[[Feature #20351]]
93+
94+
* Ruby's built-in garbage collector has been split into a separate file at
95+
`gc/default/default.c` and interacts with Ruby using an API defined in
96+
`gc/gc_impl.h`. The built-in garbage collector can now also be built as a
97+
library using `make modular-gc MODULAR_GC=default` and enabled using the
98+
environment variable `RUBY_GC_LIBRARY=default`. [[Feature #20470]]
99+
100+
* An experimental GC library is provided based on [MMTk](https://www.mmtk.io/).
101+
This GC library can be built using `make modular-gc MODULAR_GC=mmtk` and
102+
enabled using the environment variable `RUBY_GC_LIBRARY=mmtk`. This requires
103+
the Rust toolchain on the build machine. [[Feature #20860]]
104+
105+
## Language changes
106+
107+
* String literals in files without a `frozen_string_literal` comment now emit a deprecation warning
108+
when they are mutated.
109+
These warnings can be enabled with `-W:deprecated` or by setting `Warning[:deprecated] = true`.
110+
To disable this change, you can run Ruby with the `--disable-frozen-string-literal`
111+
command line argument. [[Feature #20205]]
112+
113+
* Keyword splatting `nil` when calling methods is now supported.
114+
`**nil` is treated similarly to `**{}`, passing no keywords,
115+
and not calling any conversion methods. [[Bug #20064]]
116+
117+
* Block passing is no longer allowed in index. [[Bug #19918]]
118+
119+
* Keyword arguments are no longer allowed in index. [[Bug #20218]]
120+
121+
* The toplevel name `::Ruby` is reserved now, and the definition will be warned when `Warning[:deprecated]`. [[Feature #20884]]
122+
123+
## Core classes updates
124+
125+
Note: We're only listing notable updates of Core class.
126+
127+
* Exception
128+
129+
* `Exception#set_backtrace` now accepts an array of `Thread::Backtrace::Location`.
130+
`Kernel#raise`, `Thread#raise` and `Fiber#raise` also accept this new format. [[Feature #13557]]
131+
132+
* GC
133+
134+
* `GC.config` added to allow setting configuration variables on the Garbage
135+
Collector. [[Feature #20443]]
136+
137+
* GC configuration parameter `rgengc_allow_full_mark` introduced. When `false`
138+
GC will only mark young objects. Default is `true`. [[Feature #20443]]
139+
140+
* Ractor
141+
142+
* `require` in Ractor is allowed. The requiring process will be run on
143+
the main Ractor.
144+
`Ractor._require(feature)` is added to run requiring process on the
145+
main Ractor.
146+
[[Feature #20627]]
147+
148+
* `Ractor.main?` is added. [[Feature #20627]]
149+
150+
* `Ractor.[]` and `Ractor.[]=` are added to access the ractor local storage
151+
of the current Ractor. [[Feature #20715]]
152+
153+
* `Ractor.store_if_absent(key){ init }` is added to initialize ractor local
154+
variables in thread-safty. [[Feature #20875]]
155+
156+
* Range
157+
158+
* `Range#size` now raises `TypeError` if the range is not iterable. [[Misc #18984]]
159+
160+
161+
## Standard Library updates
162+
163+
Note: We're only listing notable updates of Standard librarires.
164+
165+
* RubyGems
166+
* Add `--attestation` option to gem push. It enabled to store signature to [sigstore.dev]
167+
168+
* Bundler
169+
* Add a `lockfile_checksums` configuration to include checksums in fresh lockfiles
170+
* Add bundle lock `--add-checksums` to add checksums to an existing lockfile
171+
172+
* JSON
173+
174+
* Performance improvements of `JSON.parse` about 1.5 times faster than json-2.7.x.
175+
176+
* Tempfile
177+
178+
* The keyword argument `anonymous: true` is implemented for Tempfile.create.
179+
`Tempfile.create(anonymous: true)` removes the created temporary file immediately.
180+
So applications don't need to remove the file.
181+
[[Feature #20497]]
182+
183+
* win32/sspi.rb
184+
185+
* This library is now extracted from the Ruby repository to [ruby/net-http-sspi].
186+
[[Feature #20775]]
187+
188+
## Compatibility issues
189+
190+
Note: Excluding feature bug fixes.
191+
192+
* Error messages and backtrace displays have been changed.
193+
* Use a single quote instead of a backtick as a opening quote. [[Feature #16495]]
194+
* Display a class name before a method name (only when the class has a permanent name). [[Feature #19117]]
195+
* `Kernel#caller`, `Thread::Backtrace::Location`'s methods, etc. are also changed accordingly.
196+
197+
```
198+
Old:
199+
test.rb:1:in `foo': undefined method `time' for an instance of Integer
200+
from test.rb:2:in `<main>'
201+
202+
New:
203+
test.rb:1:in 'Object#foo': undefined method 'time' for an instance of Integer
204+
from test.rb:2:in '<main>'
205+
```
206+
207+
* Hash#inspect rendering have been changed. [[Bug #20433]]
208+
209+
* Symbol keys are displayed using the modern symbol key syntax: `"{user: 1}"`
210+
* Other keys now have spaces around `=>`: `'{"user" => 1}'`, while previously they didn't: `'{"user"=>1}'`
211+
212+
* Kernel#Float() now accepts a decimal string with decimal part omitted. [[Feature #20705]]
213+
214+
```rb
215+
Float("1.") #=> 1.0 (previously, an ArgumentError was raised)
216+
Float("1.E-1") #=> 0.1 (previously, an ArgumentError was raised)
217+
```
218+
219+
* String#to_f now accepts a decimal string with decimal part omitted. Note that the result changes when an exponent is specified. [[Feature #20705]]
220+
221+
```rb
222+
"1.".to_f #=> 1.0
223+
"1.E-1".to_f #=> 0.1 (previously, 1.0 was returned)
224+
```
225+
226+
* Refinement#refined_class has been removed. [[Feature #19714]]
227+
228+
## Standard library compatibility issues
229+
230+
* DidYouMean
231+
232+
* `DidYouMean::SPELL_CHECKERS[]=` and `DidYouMean::SPELL_CHECKERS.merge!` are removed.
233+
234+
* Net::HTTP
235+
236+
* Removed the following deprecated constants:
237+
* `Net::HTTP::ProxyMod`
238+
* `Net::NetPrivate::HTTPRequest`
239+
* `Net::HTTPInformationCode`
240+
* `Net::HTTPSuccessCode`
241+
* `Net::HTTPRedirectionCode`
242+
* `Net::HTTPRetriableCode`
243+
* `Net::HTTPClientErrorCode`
244+
* `Net::HTTPFatalErrorCode`
245+
* `Net::HTTPServerErrorCode`
246+
* `Net::HTTPResponseReceiver`
247+
* `Net::HTTPResponceReceiver`
248+
249+
These constants were deprecated from 2012.
250+
251+
* Timeout
252+
253+
* Reject negative values for Timeout.timeout. [[Bug #20795]]
254+
255+
* URI
256+
257+
* Switched default parser to RFC 3986 compliant from RFC 2396 compliant.
258+
[[Bug #19266]]
259+
260+
## C API updates
261+
262+
* `rb_newobj` and `rb_newobj_of` (and corresponding macros `RB_NEWOBJ`, `RB_NEWOBJ_OF`, `NEWOBJ`, `NEWOBJ_OF`) have been removed. [[Feature #20265]]
263+
* Removed deprecated function `rb_gc_force_recycle`. [[Feature #18290]]
264+
265+
## Miscellaneous changes
266+
267+
* Passing a block to a method which doesn't use the passed block will show
268+
a warning on verbose mode (`-w`).
269+
[[Feature #15554]]
270+
271+
* Redefining some core methods that are specially optimized by the interpeter
272+
and JIT like `String.freeze` or `Integer#+` now emits a performance class
273+
warning (`-W:performance` or `Warning[:performance] = true`).
274+
[[Feature #20429]]
275+
276+
See [NEWS](https://github.com/ruby/ruby/blob/{{ release.tag }}/NEWS.md)
277+
or [commit logs](https://github.com/ruby/ruby/compare/v3_3_0...{{ release.tag }})
278+
for more details.
279+
280+
With those changes, [{{ release.stats.files_changed }} files changed, {{ release.stats.insertions }} insertions(+), {{ release.stats.deletions }} deletions(-)](https://github.com/ruby/ruby/compare/v3_3_0...{{ release.tag }}#file_bucket)
281+
since Ruby 3.3.0!
282+
283+
Merry Christmas, Happy Holidays, and enjoy programming with Ruby 3.4!
284+
285+
## Download
286+
287+
* <{{ release.url.gz }}>
288+
289+
SIZE: {{ release.size.gz }}
290+
SHA1: {{ release.sha1.gz }}
291+
SHA256: {{ release.sha256.gz }}
292+
SHA512: {{ release.sha512.gz }}
293+
294+
* <{{ release.url.xz }}>
295+
296+
SIZE: {{ release.size.xz }}
297+
SHA1: {{ release.sha1.xz }}
298+
SHA256: {{ release.sha256.xz }}
299+
SHA512: {{ release.sha512.xz }}
300+
301+
* <{{ release.url.zip }}>
302+
303+
SIZE: {{ release.size.zip }}
304+
SHA1: {{ release.sha1.zip }}
305+
SHA256: {{ release.sha256.zip }}
306+
SHA512: {{ release.sha512.zip }}
307+
308+
## What is Ruby
309+
310+
Ruby was first developed by Matz (Yukihiro Matsumoto) in 1993,
311+
and is now developed as Open Source. It runs on multiple platforms
312+
and is used all over the world especially for web development.
313+
314+
[Feature #13557]: https://bugs.ruby-lang.org/issues/13557
315+
[Feature #15554]: https://bugs.ruby-lang.org/issues/15554
316+
[Feature #16495]: https://bugs.ruby-lang.org/issues/16495
317+
[Feature #18290]: https://bugs.ruby-lang.org/issues/18290
318+
[Feature #18980]: https://bugs.ruby-lang.org/issues/18980
319+
[Misc #18984]: https://bugs.ruby-lang.org/issues/18984
320+
[Feature #19117]: https://bugs.ruby-lang.org/issues/19117
321+
[Bug #19266]: https://bugs.ruby-lang.org/issues/19266
322+
[Feature #19714]: https://bugs.ruby-lang.org/issues/19714
323+
[Bug #19918]: https://bugs.ruby-lang.org/issues/19918
324+
[Bug #20064]: https://bugs.ruby-lang.org/issues/20064
325+
[Feature #20182]: https://bugs.ruby-lang.org/issues/20182
326+
[Feature #20205]: https://bugs.ruby-lang.org/issues/20205
327+
[Bug #20218]: https://bugs.ruby-lang.org/issues/20218
328+
[Feature #20265]: https://bugs.ruby-lang.org/issues/20265
329+
[Feature #20351]: https://bugs.ruby-lang.org/issues/20351
330+
[Feature #20429]: https://bugs.ruby-lang.org/issues/20429
331+
[Feature #20443]: https://bugs.ruby-lang.org/issues/20443
332+
[Feature #20470]: https://bugs.ruby-lang.org/issues/20470
333+
[Feature #20497]: https://bugs.ruby-lang.org/issues/20497
334+
[Feature #20564]: https://bugs.ruby-lang.org/issues/20564
335+
[Bug #20620]: https://bugs.ruby-lang.org/issues/20620
336+
[Feature #20627]: https://bugs.ruby-lang.org/issues/20627
337+
[Feature #20705]: https://bugs.ruby-lang.org/issues/20705
338+
[Feature #20715]: https://bugs.ruby-lang.org/issues/20715
339+
[Feature #20775]: https://bugs.ruby-lang.org/issues/20775
340+
[Bug #20795]: https://bugs.ruby-lang.org/issues/20795
341+
[Feature #20860]: https://bugs.ruby-lang.org/issues/20860
342+
[Feature #20875]: https://bugs.ruby-lang.org/issues/20875
343+
[Feature #20884]: https://bugs.ruby-lang.org/issues/20884
344+
[sigstore.dev]: sigstore.dev
345+
[ruby/net-http-sspi]: https://github.com/ruby/net-http-sspi

0 commit comments

Comments
 (0)