test.rb

code.rb

res = 1
for i in (0..10).to_a
  res *= i
end
res >= 100

result.txt

ruby -v
ruby 1.9.3p194 (2012-04-20 revision 35410) [x86_64-darwin11.3.0]

laptop harddrive 5400 rpm
CPU Code 2duo 2.0Ghz

~/Sites/boost% ruby ./test1.rb
       user     system      total        real
standart eval  0.470000   0.010000   0.480000 (  0.503260)
compiled eval  0.040000   0.000000   0.040000 (  0.043089)
iseq eval      0.470000   0.000000   0.470000 (  0.494641)
standart load  0.940000   0.470000   1.410000 (  1.480897)
compiled load  0.830000   0.340000   1.170000 (  1.236602)

test.rb

require 'benchmark'

code = File.open('./code.rb', 'r', &:read)

is = RubyVM::InstructionSequence.compile(code)

Benchmark.bm do |x|
  x.report("standart eval") do
    10_000.times { eval(code) }
  end

  x.report("compiled eval") do
    10_000.times { is.eval }
  end

  x.report("iseq eval    ") do
    10_000.times { RubyVM::InstructionSequence.compile(code).eval }
  end

  filename = File.expand_path(File.join(File.dirname(__FILE__), 'code.rb'))
  x.report("standart load") do
    10_000.times { load filename }
  end

  x.report("compiled load") do
    10_000.times do
      RubyVM::InstructionSequence.compile_file(filename).eval
    end
  end
end