Ticket #8818: ruby_perform.rb

require 'benchmark'

n = 1000
s = Struct.new :id
messages = []
n.times { messages << s.new(:id => rand(n)) }

class Symbol
  def to_proc
    Proc.new { |*args| args.shift.__send__(self, *args) }
  end
end

puts "Before patching..\n"

Benchmark.bm do |x|  
  # Integer
  x.report { n.times { messages.map{|m| m.id} } }
  x.report { n.times { messages.map(&:id) } }
end

class Symbol 
  def to_proc 
    lambda{|obj| obj.send self} 
  end 
end

puts "After patching..\n"

Benchmark.bm do |x|  
  # Integer
  x.report { n.times { messages.map{|m| m.id} } }
  x.report { n.times { messages.map(&:id) } }
end

# $ ruby ruby_perform.rb 
# Before patching..
#       user     system      total        real
#   0.330000   0.010000   0.340000 (  0.335991)
#   1.750000   0.000000   1.750000 (  1.797727)
# After patching..
#       user     system      total        real
#   0.330000   0.010000   0.340000 (  0.332886)
#   0.430000   0.000000   0.430000 (  0.448419)