Benchmark for Symbol#to_proc and results from various Ruby implementations

to_proc_bench.rb

# Benchmark code an results for:
# http://blog.gregspurrier.com/articles/relative-performance-of-symbol-to-proc-in-popular-ruby-implementations

require 'benchmark'

class Dummy
  def one
    1
  end
end

puts
puts ENV['RUBY_VERSION']
puts "=" * 30

Benchmark.bm(25) do |b|
  [10, 100, 1000].each do |array_size|
    dummy_array = array_size.times.map { Dummy.new }
    b.report("Symbol#to_proc (#{array_size})") do
      50_000.times { dummy_array.map &:one }
    end
    b.report("Block (#{array_size})") do
      50_000.times { dummy_array.map {|x| x.one } }
    end
  end
end

=begin

Benchmark results on MacBook Pro 2.66 GHz Intel Core 2 Duo


ruby-1.8.7-p302
==============================
                               user     system      total        real
Symbol#to_proc (10)        0.430000   0.000000   0.430000 (  0.437335)
Block (10)                 0.190000   0.000000   0.190000 (  0.195016)
Symbol#to_proc (100)       2.630000   0.000000   2.630000 (  2.632784)
Block (100)                1.680000   0.010000   1.690000 (  1.688281)
Symbol#to_proc (1000)     22.180000   0.010000  22.190000 ( 22.185858)
Block (1000)              16.570000   0.020000  16.590000 ( 16.596404)

ree-1.8.7-2010.02
==============================
                               user     system      total        real
Symbol#to_proc (10)        0.460000   0.000000   0.460000 (  0.463713)
Block (10)                 0.190000   0.000000   0.190000 (  0.186266)
Symbol#to_proc (100)       2.990000   0.000000   2.990000 (  2.990879)
Block (100)                1.540000   0.010000   1.550000 (  1.551355)
Symbol#to_proc (1000)     25.460000   0.000000  25.460000 ( 25.465169)
Block (1000)              15.290000   0.070000  15.360000 ( 15.362269)

ruby-1.9.2-p0
==============================
                               user     system      total        real
Symbol#to_proc (10)        0.100000   0.000000   0.100000 (  0.097246)
Block (10)                 0.090000   0.000000   0.090000 (  0.094039)
Symbol#to_proc (100)       0.720000   0.020000   0.740000 (  0.729175)
Block (100)                0.760000   0.010000   0.770000 (  0.773701)
Symbol#to_proc (1000)      6.920000   0.030000   6.950000 (  6.953095)
Block (1000)               7.280000   0.020000   7.300000 (  7.307675)

jruby-1.5.3
==============================
                               user     system      total        real
Symbol#to_proc (10)        1.045000   0.000000   1.045000 (  0.989000)
Block (10)                 0.136000   0.000000   0.136000 (  0.137000)
Symbol#to_proc (100)       2.200000   0.000000   2.200000 (  2.201000)
Block (100)                0.692000   0.000000   0.692000 (  0.692000)
Symbol#to_proc (1000)     20.252000   0.000000  20.252000 ( 20.252000)
Block (1000)               5.609000   0.000000   5.609000 (  5.609000)

rbx-1.1.0-20100923
==============================
                               user     system      total        real
Symbol#to_proc (10)        0.718239   0.005599   0.723838 (  0.635084)
Block (10)                 0.139432   0.000232   0.139664 (  0.109060)
Symbol#to_proc (100)       2.348010   0.003203   2.351213 (  2.351390)
Block (100)                0.311176   0.000240   0.311416 (  0.311417)
Symbol#to_proc (1000)     22.866880   0.113544  22.980424 ( 22.985340)
Block (1000)               3.252945   0.095286   3.348231 (  3.348315)

macruby-0.7.1
==============================
                               user     system      total        real
Symbol#to_proc (10)        1.080000   0.020000   1.100000 (  0.758175)
Block (10)                 0.130000   0.000000   0.130000 (  0.110563)
Symbol#to_proc (100)       9.150000   0.150000   9.300000 (  6.269290)
Block (100)                0.700000   0.030000   0.730000 (  0.639880)
Symbol#to_proc (1000)     90.920000   2.250000  93.170000 ( 61.648382)
Block (1000)               6.660000   0.390000   7.050000 (  6.186907)

=end