Optimizations.

[Pawel Jakub Dawidek]

On Fri, May 16, 2003 at 06:47:49PM +1000, Peter Jeremy wrote:
+> >Look at functions in /sys/kern/kern_tc.c. There are so many little
+> >functions. How about put __inline here and there?
+> 
+> How about you try this and post some results showing what effect this
+> has - both at the micro-benchmark level and for a real-world
+> application (like a proxy or load balancer).

Ehh, this is just an example to show that there are places that could be
optimized without loosing clean code.
Ok, this is going to nowhere.

+> >And second thing. Does anybody think about representing time in BCD code?
[...]
+> At the end, it's not clear what you gain.  You still need the ability
+> to perform arithmetic to convert between UTC and local time.  All you've
+> saved is the binary-to-decimal conversion - which is trivial compared
+> to all the other overheads.

I don't have experience in this topic, but there was some time ago long
discussion about new time representation. And I think one of the biggest
problem is to increase second when we got 999999 microseconds.
In current implementation there are some hacks (_I_think_) to speedup
this and in BCD arithmetic this is natural.
Of course I may be wrong, but this is only suggestion/idea.

PS. May intetion wasn't to start war. IMHO microoptimizations could
    increase performance - that's all. Let's stop this thread here,
    because as I see and as I said it's going to nowhere.

-- 
Pawel Jakub Dawidek                       pawel at dawidek.net
UNIX Systems Programmer/Administrator     http://garage.freebsd.pl
Am I Evil? Yes, I Am!                     http://cerber.sourceforge.net
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