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gistfile1.rb
Ruby
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require 'active_support/inflector'
require 'benchmark'
 
# QUICK HACK
class RuleSet
def initialize
@rules = []
@regexp = nil
end
 
def prepend_rule(pattern, replacement)
@rules.unshift([pattern, replacement])
patterns = @rules.each_with_index.map {|rule, i| build_regexp(rule.first, i)}
@regexp = Regexp.union(*patterns)
end
 
def build_regexp(pattern, i)
pattern = Regexp.quote(pattern) if pattern.is_a?(String)
/(?<_#{i}>#{pattern})/
end
 
def apply(word)
word = word.to_s.dup
if md = @regexp.match(word)
name = md.names.detect {|n| md[n]}
index = name[/\d+/, 0].to_i
word.gsub!(@rules[index][0], @rules[index][1])
end
word
end
end
 
rs = RuleSet.new
ActiveSupport::Inflector::Inflections.instance.plurals.each do |pattern, replacement|
rs.prepend_rule(pattern, replacement)
end
 
Benchmark.bmbm do |x|
x.report('AS') { 10000.times { %w(user post person).each {|word| ActiveSupport::Inflector.pluralize(word) }}}
x.report('RS') { 10000.times { %w(user post person).each {|word| rs.apply(word)}}}
end
 
__END__
Rehearsal --------------------------------------
AS 5.310000 0.010000 5.320000 ( 5.323167)
RS 1.100000 0.000000 1.100000 ( 1.096796)
----------------------------- total: 6.420000sec
 
user system total real
AS 5.500000 0.010000 5.510000 ( 5.545606)
RS 1.150000 0.000000 1.150000 ( 1.156264)

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