Misc #22249: DevMeeting-2026-09-10

• Status: Open
• Assignee: -

[mame (Yusuke Endoh)]

The next dev meeting

Date: 2026/09/10 13:00-17:00 (JST)
Log: TBD

• 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 record of the discussion in the 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 of the meeting are scheduled according to when/where we can reserve Matz's time.
• DO NOT discuss then on this ticket, please.

Call for agenda items

If you have a ticket that you want matz and committers to discuss, please post it into this ticket in the following format:

* [Ticket ref] Ticket title (your name)
  * Comment (A summary of the ticket, why you put this ticket here, what point should be discussed, etc.)

Example:

* [Feature #14609] `Kernel#p` without args shows the receiver (ko1)
  * I feel this feature is very useful and some people say :+1: so let discuss this feature.

• It is recommended to add a comment by 2026/09/07. We hold a preparatory meeting to create an agenda a few days before the dev-meeting.
• The format is strict. We'll use this script to automatically create an markdown-style agenda. We may ignore a comment that does not follow the format.
• Your comment is mandatory. We cannot read all discussion of the ticket in a limited time. We appreciate it if you could write a short summary and update from a previous discussion.

[mame (Yusuke Endoh)]

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

[byroot (Jean Boussier)]

• [Feature #22232] Deprecate RHASH_TBL and associated APIs (byroot)
  • I would like to deprecate RHASH_TBL, RHASH_TBL_RAW and rb_hash_bulk_insert_into_st_table.
  • It's a dangerous API because it allow bypassing write barriers
  • It restrict evolution of RHash, as we must always be able to convert a Hash into a public st_table.
  • gem-codesearch only revealed very old and low download gems.
  • All codesearch results have an equivalent rb_hash_* API, proving RHASH_TBL is useless.
• [Feature #22236] New API for adjustable JIT warmup (byroot)
  • JIT warmup can be a challenge in production.
  • After a deploy JIT warmup can cause high latency, so it may need to be tuned to avoid timeouts, queuing, etc.
  • Current tuning parameters like --yjit-call-threshold are hard to reason about, imprecise and need frequent update as the application changes.
  • I'd like YJIT, and potentially ZJIT to have an adjustable max_compile_time_ns.
  • When RubyVM::YJIT.runtime_stats[:compile_time_ns] goes over max_compile_time_ns stop compiling.
  • When max_compile_time_ns is assigned to a value higher than current compile_time_ns re-enable compilation.
  • It only need to be best effort.
  • See ticket for example usage.

[chucke (Tiago Cardoso)]

• [Feature #13677] Add hostname to "Name or service not known (SocketError)"
  • PR open in github: https://github.com/ruby/ruby/pull/16918
  • Changed message format as per suggestion in https://bugs.ruby-lang.org/issues/13677#note-12
• [Feature #21619] logger Context API
  • Putting it back here for lack of feedback last time around.
  • PR in github: https://github.com/ruby/logger/pull/132 . Mostly ready, main contentious point being whether the context store should be configurable or not.