Timer library

[Russ Allbery]

Alex Kiernan <alexk at demon.net> writes:

> OK, but there's profilers for every platform (but the Sun one does have
> the advantage of not needing a rebuild) - I wasn't so much thinking that
> the code shouldn't be there, but more that it should be a build
> option. I guess so long as the added cost when disabled is negligible
> its not an issue.

It's negligible when it's enabled, so far as I can tell.  It adds a
periodic call to gettimeofday, but that's called so frequently by most
programs that it tends to be pretty efficient (it's implemented as a
special trap on SPARC, for example, that doesn't go through the normal
system call channels).

-- 
Russ Allbery (rra at stanford.edu)             <http://www.eyrie.org/~eagle/>