From: Brian Candler <B.Candler@...>
Date: 2007-05-31T16:23:25+09:00
Subject: Re: Does this benchmark make sense?

On Thu, May 31, 2007 at 04:13:26PM +0900, Farhad Farzaneh wrote:
> > "self" doesn't involve looking up a constant; "Klassname" does.
> 
> Thanks - actually, I believe that the correct comparison is:
> [self.x]
> #       user     system      total        real
> # direct  1.880000   0.010000   1.890000 (  1.900675)
> # send  2.460000   0.010000   2.470000 (  2.509326)
> # eval 11.440000   0.050000  11.490000 ( 11.688772)
> 
> [Klassname.x]
> #       user     system      total        real
> # direct  2.230000   0.010000   2.240000 (  2.313980)
> # send  2.830000   0.020000   2.850000 (  2.919039)
> # eval 11.440000   0.050000  11.490000 ( 11.667510)

OK, checking again:
http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-talk/253666

So, "Klassname.t" and "self.class.t" are almost identical (where 'self' is
an instance of Klassname), but "Klassname.t" is slower than "self.t" (where
'self' is Klassname).

OK, it's a bit odd :-)