Patches item #27982, was opened at 2010-03-17 23:55
You can respond by visiting:
http://rubyforge.org/tracker/?func=detail&atid=577&aid=27982&group_id=126
Category: `gem install`
Group: None
Status: Open
Resolution: None
Priority: 3
Submitted By: Shri Borde (shrib)
Assigned to: Nobody (None)
Summary: Gem::Dependency#=~ is slow because it creates a Regexp everytime
Initial Comment:
Gem::SpecFetcher#find_matching calls Gem::Dependency#=~ more than 10000 times
in real-world scenarios when executing "gem install". Hence, Gem::Dependency#=~
needs to be fast. However, it sets and uses the "pattern" local variable as
such:
pattern = @name
pattern = /\A#{Regexp.escape @name}\Z/ unless Regexp === pattern
return false unless pattern =~ other.name
This is slower than it needs to be. Changing it to the following reduced
execution time of a "gem install" command from about 60 seconds down to 40
seconds.
if not @pattern
@pattern = @name
@pattern = /\A#{Regexp.escape @name}\Z/ unless Regexp === @pattern
end
return false unless @pattern =~ other.name
All the RubyGems tests pass with this change.
----------------------------------------------------------------------
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http://rubyforge.org/tracker/?func=detail&atid=577&aid=27982&group_id=126
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