gistfile1.txt

ruby bench_crop.rb
performing 500 iterations...
Rehearsal -------------------------------------------
Devil     1.390000   0.030000   1.420000 (  1.597059)
RMagick   1.100000   0.730000   1.830000 (  2.434424)
---------------------------------- total: 3.250000sec

              user     system      total        real
Devil     1.400000   0.030000   1.430000 (  1.997350)
RMagick   1.170000   0.730000   1.900000 (  2.972316)

gistfile2.rb

require 'rubygems'
require 'benchmark'
require 'RMagick'
require 'devil'

N = 500
puts "performing #{N} iterations..."

@dimg = Devil.load("texture.png")
@rimg = Magick::Image.read("texture.png").first

Benchmark.bmbm do |x|
    x.report("Devil") {
        
        N.times { 
            @dimg.crop(100, 100, 200, 200)
        }
    }

    x.report("RMagick") {
        
        N.times { 
            @rimg.crop!(100, 100, 200, 200)
        }
    }
end