benchmark_env.rb

#https://gist.github.com/709860

require 'benchmark'

# does Benchmark::bmbm have environments/setup like Test::Unit
# want some variables to be set per benchmark case - now have to dup them myself
# is is needed as the testcases have destructive operations, otherwise the testcases will be dependent on each other

larger_benchmark = Proc.new do |benchmark|
  big = (1..95).to_a
  sml = (75..110).to_a
  benchmark.report("iterate_larger") {
    big.each do |big_member|
      sml.delete_if {|sml_member| sml_member == big_member }
    end
  }  
end

diff_benchmark = Proc.new do |benchmark|
  big = (1..95).to_a
  sml = (75..110).to_a
  benchmark.report("set_diff") { sml - big }    
end

smaller_benchmark = Proc.new do |benchmark|
  big = (1..95).to_a
  sml = (75..110).to_a
  benchmark.report("iterate_smaller") { sml.collect { |sml_member| sml_member unless big.include?( sml_member ) }.compact }
end

benchmark_procs = [ larger_benchmark, diff_benchmark, smaller_benchmark ]

benchmark_procs.each do |proc|
  Benchmark.bmbm( & proc )
end