data frame subset patch, take 2

I think the efficiency gain is worthwhile.
Thx.
-jason

----- Original Message ----- 
From: "Martin Maechler" <maechler at stat.math.ethz.ch>
To: "Marcus G. Daniels" <mgd at santafe.edu>
Cc: <R-devel at r-project.org>; "Vladimir Dergachev" 
<vdergachev at rcgardis.com>
Sent: Tuesday, December 12, 2006 10:08 AM
Subject: Re: [Rd] data frame subset patch, take 2


[SNIP]

Note however that some of these changes are backward
incompatible. I do hope that the changes gaining efficiency
for such large data frames are worth some adaption of
current/old R source code..

Feedback on this topic is very welcome!

Martin

[SNIP]