Misc #14921: DevelopersMeeting20180809Japan

• Status: Closed
• Assignee: -

[shyouhei (Shyouhei Urabe)]

Please comment your favorite ticket numbers you want to ask to discuss with your SHORT comment or summary.
(your summary/comment will help us because we don't need to read all of ticket comments)

DO NOT discuss then on this ticket, please.

---

• Date: 2018/08/09 (Thu)
• Time: 14:00-18:00 (JST)
• Place: pixiv Inc. (Tokyo, Japan)
• Sign-up: https://ruby.connpass.com/event/95321/
• log: https://docs.google.com/document/d/1vRni7jVYjgMP3XqI6A-yLL2XOfK2dDjx7WAx2tE4oA0/edit
• logpub: https://docs.google.com/document/d/1vRni7jVYjgMP3XqI6A-yLL2XOfK2dDjx7WAx2tE4oA0/pub
• Past meetings: https://bugs.ruby-lang.org/projects/ruby/wiki#Developer-Meetings

NOTES

• Dev meeting IS NOT a decision making place. All decisions should be done at the bug tracker.
• Dev meeting is a place we can ask Matz, nobu, nurse and other developers directly.
• Matz is a very busy person. Take this opportunity to ask him. If you can not attend, other attendees can ask instead of you (if attendees can understand your issue).
• We will write a log about discussion to a file or to each ticket in English.
• All activities are best-effort (keep in mind that most of us are volunteer developers).
• The date, time and place is scheduled according to when/where we can reserve Matz's time.

Agenda

Next dev-meeting

About 2.6 timeframe

Carry-over from previous meeting(s)

• [Bug #14887] Array#delete_if does not use #delete (shyouhei)
  • Is it by design, or a bug?
• [Feature #13050] Readline: expose rl_completion_quote_character variable (nobu)
• [Feature #14850] Add official API for setting timezone on Time (nobu)
• [Feature #14869] Proposal to add Hash#=== (nobu)
• [Feature #14916] Proposal to add Array#=== (aycabta)
• [Feature #14877] Calculate age in Date class (nobu)
• [Bug #14908] Enumerator::Lazy creates unnecessary Array objects. (nobu)

From Attendees

(will be edited later)
(if you have a write access permission, please list directly)

• [Feature #5446] at_fork callback API (eregon) Can we get approval for introducing this? It is solving a real-world issue, in a more reliable way than the various hacks in most Ruby servers.
• [Feature #11258] add 'x' mode character for O_EXCL (kazu)
• [Misc #14907] io.c: do not close inherited FDs by default (akr)
• [Feature #14973] Proposal of percent literal to expand Hash (aycabta)

From non-attendees

• [Feature #14717] thread: allow disabling preempt (normalperson)

• [Feature #11076] Enumerable method count_by (baweaver)
  As mentioned in the discussion, Nobu was kind enough to update this to work with current master for Ruby: https://github.com/ruby/ruby/compare/trunk...nobu:feature/11076-Enumerable%23count_by

  As the code is already written I believe it would be an ideal target for 2.6 as a quick win on an often requested feature.

• [Feature #14954] Add :wait option to RubyVM::MJIT.pause (k0kubun)
  • Since it's not released even in preview2 yet, is it okay to change the behavior?
  • Is there any objection for having the option or the option name?

• (baweaver)

  • [Feature #14869] Proposal to add Hash#=== (nobu)

  • [Feature #14916] Proposal to add Array#=== (aycabta)

  • [Feature #14912] Introduce pattern matching syntax

    I believe that these three items are related, and personally I could do a lot of very interesting things with Array#=== and Hash#=== that would get us exceptionally close to features discussed in [Feature #14709]

    This to say I would second the inclusion of the first two items as they relate to the third and fourth. It would give Ruby an exceptional amount of power.

• [Feature #14759] [PATCH] set M_ARENA_MAX for glibc malloc (sam.saffron)
  I would also very much like to see it backported 2.4 and 2.5. It is of enormous value to the ecosystem

• [Feature #14736] Thread selector for flexible cooperative fiber based concurrency (ioquatix)

• [Feature #14739] Improve fiber yield/resume performance (ioquatix)

• [Bug #14968] io.c: make all pipes nonblocking by default (normalperson)
• [Misc #14937] timer-thread elimination depends on [Bug #14968] (normalperson)

• [Feature #14944] Support optional inherit argument for Module#method_defined? (jeremyevans0)

(will be edited later)
(if you have a write access, please list directly)

[Eregon (Benoit Daloze)]

• Description updated (diff)

[hsbt (Hiroshi SHIBATA)]

• Description updated (diff)

[normalperson (Eric Wong)]

https://bugs.ruby-lang.org/issues/14921

[Feature #14717] thread: allow disabling preempt

[shevegen (Robert A. Heiler)]

(Sorry for this short comment but I think the issue here is filed under
"Bug" presently, but should perhaps be moved towards "Misc" instead,
like the two prior dev-meetings.)

[matz (Yukihiro Matsumoto)]

• Tracker changed from Bug to Misc
• Backport deleted (2.3: UNKNOWN, 2.4: UNKNOWN, 2.5: UNKNOWN)

[baweaver (Brandon Weaver)]

[Feature #11076] Enumerable method count_by

As mentioned in the discussion, Nobu was kind enough to update this to work with current master for Ruby: https://github.com/ruby/ruby/compare/trunk...nobu:feature/11076-Enumerable%23count_by

As the code is already written I believe it would be an ideal target for 2.6 as a quick win on an often requested feature.

Thank you for reading!

[k0kubun (Takashi Kokubun)]

• [Feature #14954] Add :wait option to RubyVM::MJIT.pause
  • Since it's not released even in preview2 yet, is it okay to change the behavior?
  • Is there any objection for having the option or the option name?

[baweaver (Brandon Weaver)]

• [Feature #14869] Proposal to add Hash#=== (nobu)
• [Feature #14916] Proposal to add Array#=== (aycabta)
• [Feature #14912] Introduce pattern matching syntax

I believe that these three items are related, and personally I could do a lot of very interesting things with Array#=== and Hash#=== that would get us exceptionally close to features discussed in [Feature #14709]

This to say I would second the inclusion of the first two items as they relate to the third and fourth. It would give Ruby an exceptional amount of power.

[sam.saffron (Sam Saffron)]

really hoping we can make a call on:

https://bugs.ruby-lang.org/issues/14759

I would also very much like to see it backported 2.4 and 2.5. It is of enormous value to the ecosystem

[duerst (Martin Dürst)]

sam.saffron (Sam Saffron) wrote:

really hoping we can make a call on:
https://bugs.ruby-lang.org/issues/14759

@sam.saffron (Sam Saffron): Please follow the format; not everybody can remember numbers. So this should be

• [Feature #14759] set M_ARENA_MAX for glibc malloc

I would also very much like to see it backported 2.4 and 2.5. It is of enormous value to the ecosystem

[ioquatix (Samuel Williams)]

I am in Narita and I will try to come to the meeting. The only reason why I won't make it is because I get lost on the way :)

I would like to discuss the following issues:

https://bugs.ruby-lang.org/issues/14736

https://bugs.ruby-lang.org/issues/14739

if we have time.

[baweaver (Brandon Weaver)]

[Feature #14967] Any type - Adds a wildcard type, primarily for use in Pattern Matching type syntaxes

This would be related to, and give more expressive power to the following features:

[Feature #14869] Proposal to add Hash#=== (nobu)
[Feature #14916] Proposal to add Array#=== (aycabta)

[normalperson (Eric Wong)]

• [Bug #14968] io.c: make all pipes nonblocking by default

• [Misc #14937] timer-thread elimination depends on [Bug #14968]

[jeremyevans0 (Jeremy Evans)]

• [Feature #14944] Support optional inherit argument for Module#method_defined?

[znz (Kazuhiro NISHIYAMA)]

• Description updated (diff)

[aycabta (aycabta .)]

• [Feature #14973] Proposal of percent literal to expand Hash

[akr (Akira Tanaka)]

[Misc #14907] io.c: do not close inherited FDs by default

[akr (Akira Tanaka)]

• Description updated (diff)

[naruse (Yui NARUSE)]

• Description updated (diff)

[shyouhei (Shyouhei Urabe)]

• Description updated (diff)

[shyouhei (Shyouhei Urabe)]

• Description updated (diff)

[mame (Yusuke Endoh)]

• Description updated (diff)

[ioquatix (Samuel Williams)]

One more issue which would be awesome to get some input on would be https://bugs.ruby-lang.org/issues/14975 if you have time. Thanks!

[Feature #14975] String#append without changing receiver's encoding (ioquatix)

[aycabta (aycabta .)]

• [Feature #14914] Add BasicObject#instance_exec_with_block

[znz (Kazuhiro NISHIYAMA)]

• Related to Misc #14770: [META] DevelopersMeeting added

[hsbt (Hiroshi SHIBATA)]

• Status changed from Open to Closed