gistfile1.txt

Calculating -------------------------------------
              method    97.664k i/100ms
                proc    85.151k i/100ms
-------------------------------------------------
              method      2.611M (± 3.7%) i/s -     13.087M
                proc      1.910M (± 3.4%) i/s -      9.537M

Comparison:
              method:  2611065.1 i/s
                proc:  1909549.3 i/s - 1.37x slower

meth_vs_proc.rb

require 'benchmark/ips'

module Fns
  def self.upcase(input)
    input.upcase
  end
end

meth_obj = Fns.method(:upcase)
proc_obj = Fns.method(:upcase).to_proc

Benchmark.ips do |x|
  x.report('method') { meth_obj.call('foo') }
  x.report('proc') { proc_obj.call('foo') }
  x.compare!
end