From: botp <botpena@...>
Date: 2008-02-07T14:35:18+09:00
Subject: Re: idiom I've not seen before

On Feb 7, 2008 1:16 PM, Ryan Davis <ryand-ruby@zenspider.com> wrote:
>
> Buyer beware:
>
> # # of iterations = 10000
> #                           user     system      total        real
> # null_time             0.000000   0.000000   0.000000 (  0.001561)
> # map                   0.880000   0.000000   0.880000 (  0.878500)
> # to_proc               2.790000   0.000000   2.790000 (  2.799291)
>
> # # of iterations = 100000
> #                           user     system      total        real
> # null_time             0.020000   0.000000   0.020000 (  0.013951)
> # map                   8.730000   0.010000   8.740000 (  8.766693)
> # to_proc              27.960000   0.030000  27.990000 ( 28.001288)

that will change in ruby1.9 since to_proc is builtin.
eg, a run in windows,

C:\ruby1.9\bin>.\ruby.exe test.rb 1_000
# of iterations = 1000
                          user     system      total        real
null_time             0.000000   0.000000   0.000000 (  0.000000)
map                   0.203000   0.000000   0.203000 (  0.203000)
to_proc               0.156000   0.000000   0.156000 (  0.172000)

C:\ruby1.9\bin>.\ruby.exe test.rb 10_000
# of iterations = 10000
                          user     system      total        real
null_time             0.016000   0.000000   0.016000 (  0.015000)
map                   1.937000   0.000000   1.937000 (  2.515000)
to_proc               1.610000   0.000000   1.610000 (  1.954000)

C:\ruby1.9\bin>.\ruby.exe test.rb 100_000
# of iterations = 100000
                          user     system      total        real
null_time             0.328000   0.000000   0.328000 (  0.328000)
map                  19.344000   0.000000  19.344000 ( 24.953000)
to_proc              17.296000   0.015000  17.311000 ( 18.016000)

not bad, imho.
kind regards -botp