[#37730] [Ruby 1.9 - Bug #4962][Open] come back gem_prelude! — Yusuke Endoh <mame@...>

24 messages 2011/07/02

[#37840] [Ruby 1.9 - Feature #4985][Open] Add %S[] support for making a list of symbols — Aaron Patterson <aaron@...>

23 messages 2011/07/07

[#37866] [Backport87 - Feature #4996][Open] About 1.8.7 EOL — Shyouhei Urabe <shyouhei@...>

22 messages 2011/07/08

[#37913] [Ruby 1.9 - Bug #5003][Open] Enumerator#next segfaults in OS X Lion (10.7) — Ganesh Gunasegaran <ganesh.gunas@...>

16 messages 2011/07/09

[#37917] [Ruby 1.9 - Feature #5005][Open] Provide convenient access to original methods — Lazaridis Ilias <ilias@...>

13 messages 2011/07/09

[#37932] [Ruby 1.9 - Feature #5008][Open] Equal rights for Hash (like Array, String, Integer, Float) — Suraj Kurapati <sunaku@...>

31 messages 2011/07/09

[#37936] [Ruby 1.9 - Feature #5010][Open] Add Slop(-like) in stdlib and deprecate current OptionParser API — Rodrigo Rosenfeld Rosas <rr.rosas@...>

29 messages 2011/07/09

[#37968] [Ruby 1.9 - Bug #5015][Open] method_added" is called in addition to "method_undefined — Lazaridis Ilias <ilias@...>

14 messages 2011/07/10

[#38096] [Ruby 1.9 - Feature #5033][Open] PATCH: 1.9: gc_mark_children: Avoid gc_mark() tail recursion, use goto again. — Kurt Stephens <ks.ruby@...>

14 messages 2011/07/16

[#38109] [Ruby 1.9 - Bug #5034][Open] C Source Code formatting — Lazaridis Ilias <ilias@...>

18 messages 2011/07/16

[#38171] [Ruby 1.9 - Bug #5047][Open] Segfault (most likely involving require) — Jack Christensen <jack@...>

21 messages 2011/07/18

[#38182] [Ruby 1.9 - Feature #5054][Open] Compress a sequence of ends — ANDO Yasushi ANDO <andyjpn@...>

68 messages 2011/07/19

[#38197] [Ruby 1.9 - Feature #5056][Open] About 1.9 EOL — Shyouhei Urabe <shyouhei@...>

39 messages 2011/07/19
[#38900] [Ruby 1.9 - Feature #5056] About 1.9 EOL — Shota Fukumori <sorah@...> 2011/08/10

[#38902] Re: [Ruby 1.9 - Feature #5056] About 1.9 EOL — Yukihiro Matsumoto <matz@...> 2011/08/10

Hi,

[#39048] Re: [Ruby 1.9 - Feature #5056] About 1.9 EOL — SASADA Koichi <ko1@...> 2011/08/22

Hi,

[#39055] Re: [Ruby 1.9 - Feature #5056] About 1.9 EOL — Lucas Nussbaum <lucas@...> 2011/08/23

On 23/08/11 at 06:50 +0900, SASADA Koichi wrote:

[#38295] [Ruby 1.9 - Feature #5064][Open] HTTP user-agent class — Eric Hodel <[email protected]>

15 messages 2011/07/21

[#38391] [Ruby 1.9 - Bug #5076][Open] Mac OS X Lion Support — Yui NARUSE <naruse@...>

17 messages 2011/07/22

[#38503] [Ruby 1.9 - Feature #5096][Open] offer Logger-compatibility for ext — Eric Wong <normalperson@...>

16 messages 2011/07/25

[#38510] [Ruby 1.9 - Feature #5097][Assigned] Supported platforms of Ruby 1.9.3 — Yui NARUSE <naruse@...>

42 messages 2011/07/26

[#38526] [Backport92 - Backport #5099][Open] Backport r31875 load path performance problem — Aaron Patterson <aaron@...>

19 messages 2011/07/26

[#38538] [Ruby 1.9 - Feature #5101][Open] allow optional timeout for TCPSocket.new — Eric Wong <normalperson@...>

15 messages 2011/07/27

[#38610] [Ruby 1.9 - Feature #5120][Open] String#split needs to be logical — Alexey Muranov <muranov@...>

18 messages 2011/07/30

[#38623] [Ruby 1.9 - Feature #5123][Open] Alias Hash 1.9 as OrderedHash — Alexey Muranov <muranov@...>

14 messages 2011/07/31

[ruby-core:37813] Re: [Ruby 1.9 - Bug #4962][Open] come back gem_prelude!

From: Aaron Patterson <aaron@...>
Date: 2011-07-05 21:56:09 UTC
List: ruby-core #37813
On Sat, Jul 02, 2011 at 02:18:35PM +0900, Yusuke Endoh wrote:
>=20
> Issue #4962 has been reported by Yusuke Endoh.
>=20
> ----------------------------------------
> Bug #4962: come back gem_prelude!
> http://redmine.ruby-lang.org/issues/4962
>=20
> Author: Yusuke Endoh
> Status: Open
> Priority: Normal
> Assignee: Eric Hodel
> Category: lib
> Target version: 1.9.3
> ruby -v: ruby 1.9.3dev (2011-07-01 trunk 32356) [i686-linux]
>=20
>=20
> Hello, rubygems developers
>=20
> Kosaki-san noticed that 1.9.3 is slower than 1.9.2 on many benchmarks.
> http://www.atdot.net/sp/view/5qunnl
>=20
> I investigated and found that the cause is the lack of gem_prelude.rb.
>=20
> Loading rubygems seems to create many objects and keep the references
> to them.  See below:
>=20
>=20
> $ ruby -ve 'GC.start; p ObjectSpace.count_objects[:TOTAL]'
> ruby 1.9.2p180 (2011-02-18 revision 30909) [i686-linux]
> 9821
>=20
> $ ./ruby -ve 'GC.start; p ObjectSpace.count_objects[:TOTAL]'
> ruby 1.9.3dev (2011-07-01 trunk 32356) [i686-linux]
> 19638
>=20
> $ ./ruby --disable-gems -ve 'GC.start; p ObjectSpace.count_objects[:TOTAL=
]'
> ruby 1.9.3dev (2011-07-01 trunk 32356) [i686-linux]
> 9821
>=20
>=20
> The number of live objects is proportional to the cost of GC mark phase.
> You can actually confirm the performance degradation with the following
> benchmark script:
>=20
>   require 'tempfile'
>   max =3D 200_000
>   str =3D "Hello world!  " * 1000
>   f =3D Tempfile.new('yarv-benchmark')
>   f.write str
>   GC::Profiler.enable
>   max.times{
>     f.seek 0
>     f.read
>   }
>   p GC::Profiler.total_time
>=20
>=20
> $ time ruby -v bm_io_file_read.rb
> ruby 1.9.2p180 (2011-02-18 revision 30909) [i686-linux]
> 0.7280460000000308
>=20
> real    0m3.965s
> user    0m2.940s
> sys     0m1.024s
>=20
> $ time ./ruby -v bm_io_file_read.rb
> ruby 1.9.3dev (2011-07-01 trunk 32356) [i686-linux]
> 1.396088000000029
>=20
> real    0m4.786s
> user    0m3.716s
> sys     0m1.060s
>=20
> $ time ./ruby --disable-gems -v bm_io_file_read.rb
> ruby 1.9.3dev (2011-07-01 trunk 32356) [i686-linux]
> 0.7640390000000309
>=20
> real    0m4.079s
> user    0m2.872s
> sys     0m1.192s
>=20
>=20
> The performance degradation can be seen by not only such micro benckmarks,
> but also my puzzle solvers :-(
>=20
>=20
> There are some approaches to address the problem:
>=20
>   1. to introduce a generational GC; this is impossible until 2.0 because
>      it requires modifications to all extension libraries.
>=20
>   2. to diet rubygems; do not create any string, array, hash, and any
>      object as much as possible, and do not keep the references to them.
>=20
>   3. to restore gem_prelude.rb to delay loading rubygems.

We can also help rbconfig go on a diet.  I know it's not enough, but
this eliminated ~400 object allocations on my machine.  (what is the
MAKEFILE_CONFIG for anyway?)

diff --git a/tool/mkconfig.rb b/tool/mkconfig.rb
index a2221f0..d78a347 100755
--- a/tool/mkconfig.rb
+++ b/tool/mkconfig.rb
@@ -202,8 +202,6 @@ print <<EOS
   CONFIG["vendorlibdir"] =3D "$(vendordir)/$(ruby_version)"
   CONFIG["vendorarchdir"] =3D "$(vendorlibdir)/$(sitearch)"
   CONFIG["topdir"] =3D File.dirname(__FILE__)
-  MAKEFILE_CONFIG =3D {}
-  CONFIG.each{|k,v| MAKEFILE_CONFIG[k] =3D v.dup}
   def RbConfig::expand(val, config =3D CONFIG)
     newval =3D val.gsub(/\\$\\$|\\$\\(([^()]+)\\)|\\$\\{([^{}]+)\\}/) {
       var =3D $&
@@ -233,6 +231,13 @@ print <<EOS
       RbConfig::CONFIG["ruby_install_name"] + RbConfig::CONFIG["EXEEXT"]
     )
   end
+
+  def self.const_missing const
+    return super unless :MAKEFILE_CONFIG =3D=3D const
+    const_set :MAKEFILE_CONFIG, {}
+    CONFIG.each{|k,v| MAKEFILE_CONFIG[k] =3D v.dup}
+    MAKEFILE_CONFIG
+  end
 end
 autoload :Config, "rbconfig/obsolete.rb" # compatibility for ruby-1.8.4 an=
d older.
 CROSS_COMPILING =3D nil unless defined? CROSS_COMPILING

--=20
Aaron Patterson
http://tenderlovemaking.com/

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