Re: What happens to DEC Ada?

[Wes Groleau <wwgrol@sparc01.ftw.rsc.raytheon.com>]

> I'm suprised to find GNAT faster than Apex for a really
> large set of source files.  My own experience is that for

For the "all files" case, GNAT is faster, but not by much,
in SINGLE THREAD mode.

However, because GNAT has no "DIANA" it can easily do many
files in parallel.  Try that with Apex on this big a set of
files (most with LOTS of context clauses) and invariably
there will be a collision on the same file, resulting in
"severe errors" which means a large portion of the job must
be repeated.

When doing _only_ obsolete files and only a small percentage
of the job, Apex does not usually have that problem and we can
work in parallel.  However, even with more than two dozen
processors, the time savings is only 60 percent.  With the
size of our project, Apex takes a long time to figure out
which files are obsolete.

In fact, if NO files are obsolete, Apex takes quite a while
to verify that.

-- 
Wes Groleau
http://freepages.rootsweb.com/~wgroleau