From: Miao Jiang <redmine@...>
Date: 2010-03-25T04:36:11+09:00
Subject: [ruby-core:28954] [Feature #3010] slow require gems in ruby 1.9.1

Feature #3010: slow require gems in ruby 1.9.1
http://redmine.ruby-lang.org/issues/show/3010

Author: Miao Jiang
Status: Open, Priority: Normal
Category: core, Target version: 1.9.x

ruby 1.9.1 version: ruby 1.9.1p420 (2010-02-04 revision 26571) [i686-linux]
ruby 1.8.7 version: ruby 1.8.7 (2010-01-10 patchlevel 249) [i686-linux]
ruby 1.9 takes a lot time on require 'gemname'
------
for code: foo.rb
puts $:.size
require 'rubygems'
require 'active_record'
puts $:.size

run: time foo.rb
--
in 1.9.1 it shows
106
110
real	0m0.905s
user	0m0.777s
sys	0m0.125s

in 1.8.7 it shows
9
21
real	0m0.263s
user	0m0.188s
sys	0m0.060s
-------
And I check $: in code start and after load gem.
in 1.9.1 ruby load the whole rubygems directory on start. 
in 1.8.7 ruby only load the nessceary directory for rubygems.
Maybe that is the reason.


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