Ticket #8818: symtoproc.rb

require 'benchmark'

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

class Symbol
  puts "Defined to_proc for #{RUBY_VERSION}"
  def to_proc
    Proc.new { |*args| args.shift.__send__(self, *args) }
  end
end if RUBY_VERSION < '1.9'

puts "Before patching for #{RUBY_VERSION}\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

# lifo:~/labs/rubyedge/bin pratik$ ./ruby ~/labs/symtoproc.rb 
# Before patching for 1.9.0
#       user     system      total        real
#   0.390000   0.010000   0.400000 (  0.404891)
#   1.010000   0.010000   1.020000 (  1.025648)
# After patching..
#       user     system      total        real
#   0.350000   0.000000   0.350000 (  0.355118)
#   0.390000   0.010000   0.400000 (  0.411593)

# lifo:~/labs/rubyedge/bin pratik$ ruby ~/labs/symtoproc.rb 
# Defined to_proc for 1.8.6
# Before patching for 1.8.6
#       user     system      total        real
#   0.740000   0.020000   0.760000 (  0.787545)
#   5.240000   0.040000   5.280000 (  5.333900)
# After patching..
#       user     system      total        real
#   0.700000   0.000000   0.700000 (  0.713298)
#   1.690000   0.010000   1.700000 (  1.705961)