[ruby-core:78059] Re: Ruby 2.4.0-preview3 Released

Great news!

Looks like ChangeLog file is missing from the branch (and link to it leads
to 404)

2016-11-09 15:11 GMT+02:00 NARUSE, Yui <[e-mail]>:

> We are pleased to announce the release of Ruby 2.4.0-preview3.
>
> Ruby 2.4.0-preview3 is the third preview of Ruby 2.4.0.
> This preview3 is released to get feedback from the community.
> Feel free to
> [send feedback](https://bugs.ruby-lang.org/projects/ruby/wiki/HowToReport)
> since you can still influence the features.
>
> ## [Introduce hash table improvement by Vladimir
> Makarov](https://bugs.ruby-lang.org/issues/12142)
>
> Improve the internal structure of hash table (st_table) with
> introducing open addressing
> and inclusion order array.
> This improvement is discussed with many people, especially with Yura
> Sokolov.
>
> ## Binding#irb: Start a REPL session like `binding.pry`
>
> While you are debugging, you may often use `p` to see the value of
> variables.
> With [pry](https://github.com/pry/pry) and you wrote `binding.pry` in
> your application,
> it will launch REPL and you can run any ruby code.
> [r56624](https://github.com/ruby/ruby/commit/
> 493e48897421d176a8faf0f0820323d79ecdf94a)
> introduces `binding.irb` which behaves like that with irb.
>
> ## [Unify Fixnum and Bignum into
> Integer](https://bugs.ruby-lang.org/issues/12005)
>
> Though [ISO/IEC
> 30170:2012](http://www.iso.org/iso/iso_catalogue/
> catalogue_tc/catalogue_detail.htm?csnumber=59579)
> doesn't specify details of the Integer class,
> Ruby had two visible Integer classes: Fixnum and Bignum.
> Ruby 2.4 unifies them into Integer.
> All C extensions which touch the Fixnum or Bignum class need to be fixed.
>
> See also [the ticket](https://bugs.ruby-lang.org/issues/12005) and
> [akr's slides](http://www.a-k-r.org/pub/2016-09-08-rubykaigi-
> unified-integer.pdf).
>
> ## [String supports Unicode case
> mappings](https://bugs.ruby-lang.org/issues/10085)
>
> `String/Symbol#upcase/downcase/swapcase/capitalize(!)` now handle
> Unicode case mappings instead of only ASCII case mappings.
>
> ## Performance improvements
>
> Ruby 2.4 also contains the following performance improvements including
> language changes:
>
> ### [Array#max, Array#min](https://bugs.ruby-lang.org/issues/12172)
>
> `[x, y].max` and `[x, y].min` are optimized to not create a temporary array
> under certain conditions.
>
> ### [Regexp#match?](https://bugs.ruby-lang.org/issues/8110)
>
> Added `Regexp#match?`, which executes a regexp match without creating
> a back reference object and changing `$~` to reduce object allocation.
>
> ### Other performance improvements
>
> * [speed up instance variable access](https://bugs.ruby-
> lang.org/issues/12274)
>
> ## Debugging
>
> ### [Thread#report_on_exception and
> Thread.report_on_exception](https://bugs.ruby-lang.org/issues/6647)
>
> Ruby ignores exceptions in threads unless another thread explicitly joins
> them.
> With `report_on_exception = true`,
> you can notice if a thread has died due to an unhandled exception.
>
> Send us feedback what should be the default for `report_on_exception`
> and about report-on-GC, which shows a report when a thread is
> garbage collected without join.
>
> ### [Thread deadlock detection now shows threads with their backtrace
> and dependency](https://bugs.ruby-lang.org/issues/8214)
>
> Ruby has deadlock detection around waiting threads, but its report doesn't
> include enough information for debugging.
> Ruby 2.4's deadlock detection shows threads with their backtrace and
> dependent threads.
>
> Try and enjoy programming with Ruby 2.4.0-preview3, and
> [send us feedback](https://bugs.ruby-lang.org/projects/ruby/wiki/
> HowToReport)!
>
> ## Other notable changes since 2.3
>
> * Support OpenSSL 1.1.0
> * ext/tk is now removed from stdlib [Feature #8539]
> * XMLRPC is now removed from stdlib [Feature #12160]
>
> See [NEWS](https://github.com/ruby/ruby/blob/v2_4_0_preview3/NEWS)
> and [ChangeLog](https://github.com/ruby/ruby/blob/v2_4_0_
> preview3/ChangeLog)
> for details.
>
> With those changes,
> [2470 files changed, 283051 insertions(+), 64902
> deletions(-)](https://github.com/ruby/ruby/compare/v2_3_0..
> .v2_4_0_preview3)
> since Ruby 2.3.0!
>
> ## Download
>
> * <https://cache.ruby-lang.org/pub/ruby/2.4/ruby-2.4.0-preview3.tar.bz2>
>
>   * SIZE:   12615328 bytes
>   * SHA1:   fefe49f6a7d5b642936c324f3b05aaac827355db
>   * SHA256: 305a2b2c627990e54965393f6eb1c442eeddfa149128ccdd9f4334e2e00a
> 2a52
>   * SHA512: 6602c65a7b1e3bc680acc48217108f4335e84fdd74a9cf06f2e2f9ad00a2
> fccacf9fa035a912bc9d5cc3f0c7a5
> e21475971dfac37b0364311ef3645f25c7ddf9
>
> * <https://cache.ruby-lang.org/pub/ruby/2.4/ruby-2.4.0-preview3.tar.gz>
>
>   * SIZE:   15758023 bytes
>   * SHA1:   f6a6ec9f7fedad0bf4efee2e42801cc963f60dca
>   * SHA256: c35fe752ccfabf69bf48e6aab5111c25a05938b428936f780638e2111934
> c9dd
>   * SHA512: 68556d5252b6813b4c8eeba32733e940207f80694b5c5d20e69bf01eb529
> 29ed2466496b05a895a5ad4831d430
> 695e17624eb35b728b2d4d7cf02df756ac48b4
>
> * <https://cache.ruby-lang.org/pub/ruby/2.4/ruby-2.4.0-preview3.tar.xz>
>
>   * SIZE:   9957596 bytes
>   * SHA1:   66592b1a52f985638d639e7c3dd6bdda4e0569d0
>   * SHA256: b14be2b5c80bff0d6894ae2b37afdb17a968413e70236ec860f3e2d670b4
> c317
>   * SHA512: 5be20f0b2609745790c2b22f2228e69a840f63c34a117a1f95fd5436af21
> 1f0a6db2758d513d3e095a2d97c53c
> 80793579cb2a1e00e70cf72c487a88c4a40d33
>
> * <https://cache.ruby-lang.org/pub/ruby/2.4/ruby-2.4.0-preview3.zip>
>
>   * SIZE:   17579012 bytes
>   * SHA1:   15d08cff952da3844ae54887b7f74b12d47c9ee2
>   * SHA256: b95a8f67fb7d6e852db77c5660c8878c14d68eb72c5501dac164a7e640ec
> b06e
>   * SHA512: fa15e1b7ab0cab56c9a580e1b1e2fee250ee0b9c59546079675a1931a36e
> 37131bd37d64033c75e05d8e9d9fcc
> 33ce7850254d3acaca2136cf3bd08b070244f0
>
> ## Release Comment
>
> See also the release schedule and other information:
>
> [ReleaseEngineering24](https://bugs.ruby-lang.org/projects/
> ruby-trunk/wiki/ReleaseEngineering24)
>
> --
> NARUSE, Yui  <[e-mail]>
>
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