From xemacs-m  Sun Feb  9 18:06:12 1997
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From: Kyle Jones <kyle_jones@wonderworks.com>
To: xemacs-beta@xemacs.org
Subject: Re: wot i need
In-Reply-To: <97Feb9.181831edt.11153(1)@jupiter.scs.Ryerson.CA>
References: <199702091140.AA266538445@martigny.ai.mit.edu>
	<m2d8uaduc0.fsf@proletcult.slip.ifi.uio.no>
	<199702092241.OAA19401@xemacs.eng.sun.com>
	<97Feb9.181831edt.11153(1)@jupiter.scs.Ryerson.CA>

Dave Mason writes:
 > [...]
 > There was another significant performance hit on Solaris
 > release 2.5: they went from making 7 register windows
 > available to the application level to making only 6 of them
 > available (it might be 6 and 5, but they did decrease by 1).
 > This means that anything that traverses 7 levels of call depth
 > frequently will invoke a system trap each time down and each
 > time up.  This slowed TeX/LaTeX down by a *very* significant
 > factor (I think almost a factor of 2!).  But this effect
 > should not make any difference between Emacs 19.34 and Xemacs
 > if compiled with the same compiler.

Well, it might.  XEmacs' call stack goes deeper when setting
symbol values for instance.

