[ruby-core:116079] [Ruby master Misc#20075] DevMeeting-2024-01-17

Issue #20075 has been updated by jeremyevans0 (Jeremy Evans).


* [Feature #20066] Reduce Implicit Array/Hash Allocations For Method Calls Involving Splats (jeremyevans0)
  * This is a collection of 6 optimizations, some of which are independent.
  * I think the first 5 are the most useful.
    * The 6th, which tracks splat mutability between calls using frame/callinfo flags, is the most invasive and may not be worth it from a cost/benefit perspective.
  * The 4th and 5th allow for a performance optimization not currently possible, when using anonymous splats or `...` argument forwarding instead of named splat forwarding.
    * I expect these optimizations to have the most impact, after code is updated to switch to anonymous splats or `...` forwarding.
  * Currently, the patch slows down yjit-bench with YJIT, because YJIT does not implement the new instructions, or contain the same optimizations.
    * I expect yjit-bench with YJIT will speed up if YJIT implements the same optimizations.
  * Is it OK to merge the pull request as-is, or to merge a subset of the optimization patches?
* [Bug #5179] Complex#rationalize and to_r with approximate zeros (jeremyevans0)
  * Discussed last at the January 2020 developer meeting (as part of #5321).
  * Considering we have Float#to_r, can we change `Complex(1, 0.0).to_r` to return `Rational(1,1)`, as `Complex(1, 0.0.to_r).to_r` does?
* [Bug #19918] Should `a[&b]=c` be syntax valid? (jeremyevans0)
  * This is currently valid syntax, and there are tests for it.
  * Should we change this to invalid syntax?
  * If we keep this syntax:
    * It currently evaluates `c` before `b`.
    * Should it be fixed to evaluate `b` before `c`?
* [Bug #19542] Operations on zero-sized IO::Buffer are raising (jeremyevans0)
  * Is this behavior expected or a bug?

----------------------------------------
Misc #20075: DevMeeting-2024-01-17
https://bugs.ruby-lang.org/issues/20075#change-106075

* Author: mame (Yusuke Endoh)
* Status: Open
* Priority: Normal
----------------------------------------
# The next dev meeting

**Date: 2024/01/17 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 2024/01/14. 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](https://gist.github.com/mame/b0390509ce1491b43610b9ebb665eb86).  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.




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