From: nobu.nokada@...
Date: 2002-08-05T10:44:29+09:00
Subject: Re: A truth? patch  + benchmarks

Hi,

At Mon, 5 Aug 2002 09:58:11 +0900,
Christoph wrote:
> If the ``magic'' is referring to my observed speedup of replacing 
> most RTEST macro calls with an inlined function call (at least on
> my windows machine this effect seems to be real), I really have 
> to pass (besides making uneducated guesses) but I tend to think that 
> this "compilation optimization artifact" is wedded to the current 
> implementation (putting things in perspective, changing from VC6 to
> VC7 has an even bigger impact on speed).

It's true with gcc 2.95.3 under i686-linux.

> Just been curious (and pushy;-). I counted 26 ``T_VALUES'' in ruby.h,
> so from my naive point of view it might be possible (after 
> rearranging the ``T_VALUES'' a bit, eehm, <= 31) to free up the sixth
> bit as a false/true bit. Of course, I tried this and did not see any
> obvious ill effect (running ``make test''  and ``rubicon'' on cygwin)
> - I guess that's what they call wishful thinking;-).  

The modification means that *all* extension libraries must be
recompiled.  Particularly, many extensions use T_DATA which is
bigger than 31.  I guess it shouldn't be until (at least) minor
version will change.

-- 
Nobu Nakada