Subject: Re: push From: Erik Naggum <erik@naggum.no> Date: 1999/06/19 Newsgroups: comp.lang.lisp Message-ID: <3138777768045703@naggum.no> * Erik Naggum <erik@naggum.no> | in some cases, it is even cost-effective to use REVERSE because of | gargage collector issues. * David Bakhash <dave@teracorp.com> | can you elaborate? maybe with an example, or is this something you can | only know from profiling? two issues if the list is accumulated over a long time relative to other consing: its locality of reference is vastly improved with REVERSE and thus the cost of future accesses goes down, and crossing the old/new space line is more expensive than cosing, all counted. I made the point to show that this is not a trivial issue, that it is very hard to predict the behavior without good knowledge of the system. #:Erik -- @1999-07-22T00:37:33Z -- pi billion seconds since the turn of the century