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Re: sccs2rcs to perl

From: Ian Lance Taylor
Subject: Re: sccs2rcs to perl
Date: 08 Mar 2002 11:17:45 -0800
User-agent: Gnus/5.0808 (Gnus v5.8.8) Emacs/20.7

larry.jones@sdrc.com (Larry Jones) writes:

> SCCS can retrieve any revision in one pass through the file.  As you
> say, there are the equivalent of "#ifdefs" that specify which revisions
> include the following lines , so there's very little processing time,
> it's mostly just I/O time.  CVS as currently implemented has to read the
> entire RCS file before doing anything, so I'd be very surprised if it's
> significantly faster.

It was not the case formerly that CVS read the entire RCS file to
retrieve the head revision.  I haven't looked at the current code.
But previously CVS would just read the RCS header (including all the
tags), and then only read revision text as required.


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