From: Urabe Shyouhei <shyouhei@...>
Date: 2009-02-15T08:07:48+09:00
Subject: [ruby-core:22123] Re: A short memorandum (Re: 1.8.7 Specifics)

Ezra Zygmuntowicz wrote:
> 1. Which backports to 1.8.6 are you talking about  in your last email?

Well I'm maintaining a list of revisions that needs/experienced backport to
1.8.6 and 1.8.7.
That list is on public svn and can be accessed via following URI(*), but it's
hand-written so may be hard for you to read (sorry).  I'm attaching "what to
backport" list at the end of this mail.

* http://svn.coderepos.org/share/docs/shyouhei/ruby development/revisions.txt

> 2. What are your thoughts on Brent's MBARI patches? We have done some
> extensive testing and these patches make a huge difference in memory
> consumption and speed for production ruby applications. We are
> sponsoring Brent to port these patches to 1.8.6 currently and would
> really like to see these become part of mainline ruby 1.8.6, 1.8.7,
> 1.8.*. These patches do not break any apis or backwards compat but
> drastically improve the memory pressure of all the ruby apps we've
> tested it on. We've seen ruby apps spend up to 45% of their cpu wall
> time in the GC, with these patches that percentage is vastly reduced.

I see no reasons to reject them for forthcoming 1.8.* versions.  It seems some
of them has already been merged by nobu.  For 1.8.6 and 1.8.7, you should
really carefully watch your step, because I see some API addition on those
patches.  You know why 1.8.7 is hated this much (in spite of it's being almost
backward compatible).

--
"what to backport" list
* some of them might not be applied
  * maybe because they turned out not to be a bug
  * maybe because appling them breaks tests
* some other revs might be added in the future

revisions   | what it is
------------+-------------------------------------------------------
20252:20255 | [ruby-dev:37110]
20276:20279 | [ruby-dev:37119]
20287       | [ruby-core:19971]
20300       | nagai tk patch (applies?)
20350       | nagai tk patch (applies?)
20354       | [ruby-core:20082]
20360:20363 | [ruby-dev:37182]
20445       | [ruby-core:12020]
20525       | matz infection patch
20537       | usa fork patch
20540       | usa isatty patch
20578       | [ ruby-Bugs-22525 ]
20580       | [ruby-dev:37283]
20581       | [ruby-dev:37289]
20752       | [ruby-core:20561]
20855       | [ruby-core:20603] [ruby-core:20604]
20884       | [ruby-core:18635]
21066       | [ruby-dev:36692]
21165       | [ruby-core:20446]
21297       | [ruby-core:21096]
21298       | [ruby-dev:37691] <- suspicious spec change?
21353       | [ruby-core:13889]
21365       | [ruby-core:17333]
21407       | [ruby-dev:25712] [ruby-dev:25700] [ruby-dev:25707]
21423       | [ruby-core:21249]
21432       | [ruby-dev:37751]
21447       | [ruby-core:21269] <- Windows bug?
21505       | [ruby-core:21328]
21677       | [ruby-dev:37776]
21688       | [ruby-core:21453]
21726       | [ruby-dev:36646]
21727       | [ruby-core:21500]
21749       | [ruby-core:21448]
21913       | [ruby-core:21561]
21994       | [ruby-core:20113]
21997       | [ruby-core:18749]
22011       | [ruby-dev:37545]