bench

== bench

• http://bench.rubyforge.org
• http://rubyforge.org/projects/bench

== DESCRIPTION

Do you remeber how to use the benchmark library from the Ruby standard lib? I don't.

Now you need not to remember, there is Bench: A DSL around the benchmark lib of the Ruby standard lib with the goal to make benchmarking as easy as possible.'

== SYNOPSIS

First an adapted example of the benchmark documentation from the pickaxe version 2 page 657

require 'bench'

string = 'Stormy Weather' m = string.method(:length)

benchmark 'code' do m.call end

benchmark 'send' do string.send(:length) end

benchmark 'eval' do eval "string.length" end

run 10_000

You call the run method more than once for identifying rought values.

It's also nice to use Bench interactive with irb:

require 'bench' => true benchmark 'simple' do ?> /ll/ =~ 'hello world' end => [#<OpenStruct name="simple", proc=#Proc:0xb7bf7acc@(irb):2] benchmark 'freezed' do ?> /ll/.freeze =~ 'hello world' end => [#<OpenStruct name="simple", proc=#Proc:0xb7bf7acc@(irb):2, #<OpenStruct na me="freezed", proc=#Proc:0xb7bf26d0@(irb):5] run 1000 user system total real simple 0.000000 0.000000 0.000000 ( 0.003960) freezed 0.010000 0.000000 0.010000 ( 0.004870) => true run 1000 user system total real simple 0.010000 0.000000 0.010000 ( 0.003969) freezed 0.000000 0.000000 0.000000 ( 0.004624) => true

let's try more iterations

?> run 10000 user system total real simple 0.060000 0.000000 0.060000 ( 0.058049) freezed 0.060000 0.000000 0.060000 ( 0.058636) => true

run 100000 user system total real simple 0.500000 0.000000 0.500000 ( 0.502427) freezed 0.540000 0.000000 0.540000 ( 0.533421) => true

now another benchmark sample

?> RE = /ll/ => ll

benchmark 'constant' do ?> RE =~ 'hello world' end => [#<OpenStruct name="simple", proc=#Proc:0xb7bf7acc@(irb):2, #<OpenStruct name="freezed", proc=#Proc:0xb7bf26d0@(irb):5, #<OpenStruct name="constant", proc=#Proc:0xb7c26250@(irb):15] run user system total real simple 0.000000 0.000000 0.000000 ( 0.000031) freezed 0.000000 0.000000 0.000000 ( 0.000469) constant 0.000000 0.000000 0.000000 ( 0.000031) => true run 100000 user system total real simple 0.500000 0.000000 0.500000 ( 0.507686) freezed 0.540000 0.000000 0.540000 ( 0.537840) constant 0.550000 0.000000 0.550000 ( 0.552103) => true run 100000 user system total real simple 0.510000 0.000000 0.510000 ( 0.506002) freezed 0.520000 0.000000 0.520000 ( 0.542898) constant 0.520000 0.020000 0.540000 ( 0.552802) => true run 100000 user system total real simple 0.510000 0.000000 0.510000 ( 0.504704) freezed 0.530000 0.000000 0.530000 ( 0.536948) constant 0.560000 0.000000 0.560000 ( 0.554470) => true

== CREDITS

Copyright 2008 by Jan Friedrich ([e-mail])

== LICENSE

Ruby's license.