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> -----Original Message-----
> From: Alex Young [mailto:alex / blackkettle.org] 
> Sent: Sunday, October 21, 2007 3:51 AM
> To: ruby-talk ML
> Subject: Re: installing ruby on ubuntu GNU/Linux
> 
> Devi Web Development wrote:
> > The main reason I am asking is I read somewhere that the 
> performance of
> > Firefox is different in the packages versus building it yourself.
> That applies to Ruby too.  I forget the precise stats, but 
> self-compiled 
> Ruby is significantly faster than the packaged version (it's the 
> --enable-pthreads flag that does it, IIRC).  Ubuntu has also 
> been known 
> to package broken gems in the past, and the packagers can't/shouldn't 
> have to /don't bother keeping up with the latest releases.  
> You'll avoid 
> the most problems if you do it all yourself.
> 
> -- 
> Alex

Changing the pthreads flags may break Tk, if I recall correctly.
You can also gain performance by using processor specific optimizations,
http://gentoo-wiki.com/Safe_Cflags has a pretty good list for all kind of
processors.

One thing you will want to look out for is that ruby will compile fine
without a few libraries headers that ubuntu does not install by default, but
that you'll end up missing functionality. You will want to install
zlib1g-dev, libsyck0-dev, libgdbm-dev and libreadline5-dev, though that is
not an exhaustive list. Otherwise, quite a few gems and even stock
functionality will complain - and irb won't support history browsing without
readline, for example.

HTH,

Felix

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