From: "Iñaki Baz Castillo" <ibc@...>
Date: 2008-09-11T11:06:51+09:00
Subject: Re: How to change the owner of a method in a block?

El Jueves, 11 de Septiembre de 2008, botp escribió:
> On Wed, Sep 10, 2008 at 7:24 PM, Iñaki Baz Castillo <ibc@aliax.net> wrote:
> > So using "instance_eval" is ~  40% slower than running directly the code.
>
> well, we can try again :)
>
> botp@jedi-hopeful:~$ cat test.rb
> require 'benchmark'
> n=100_000
> Benchmark.bmbm do |x|
>   x.report("normal") { n.times { a=nil;a=123; a2=a*2; a3=a*3 }}
>   x.report("string") { n.times {instance_eval 'a=nil;a=123; a2=a*2; a3=a*3'
> }} x.report("block") { n.times {instance_eval {a=nil;a=123; a2=a*2; a3=a*3}
> }} x.report("block-broken") { n.times {a=nil;instance_eval{a=123};
>                                       instance_eval{ a2=a*2};
>                                       instance_eval{a3=a*3}
>                                       }
>                             }
> end
>
>
>
>
> botp@jedi-hopeful:~$ ruby test.rb
> Rehearsal ------------------------------------------------
> normal         0.140000   0.000000   0.140000 (  0.247775)
> string         2.420000   0.010000   2.430000 (  3.438391)
> block          0.250000   0.000000   0.250000 (  0.375656)
> block-broken   0.470000   0.010000   0.480000 (  0.698093)
> --------------------------------------- total: 3.300000sec
>
>                    user     system      total        real
> normal         0.120000   0.000000   0.120000 (  0.216789)
> string         2.480000   0.020000   2.500000 (  3.291342)
> block          0.300000   0.000000   0.300000 (  0.423327)
> block-broken   0.490000   0.000000   0.490000 (  0.703046)
> botp@jedi-hopeful:~$
>
>
> slower but not slow (in my own mileage :)
> or optimistically, direct code is faster than a code block

Good comparision, thanks :)

-- 
Iñaki Baz Castillo