Building files from other files

[JORDAN at gmr.COM]

We work in a real time environment, and have noticed something strange
in a particular "driving" loop.

We have two files, exactly the same (visually).  Let's call them a.c, and
a.copy.

a.copy was made from a.c by:
	cp a.c a.copy

Then some extra info was added to a.copy from b.c:

	cat b.c >> a.copy

This added info ruined the performance of the environment so b.c was deleted
from a.copy.  Therefore, a.copy looks the same as a.c.

The Problem?  a.copy still has the bad performance as if b.c were still a
part of the code.

A "diff a.c a.copy" outputs nothing; therefore, no difference.  HELP!!

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