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[DPRG] EmbedCV
Subject: [DPRG] EmbedCV
From: Dave Hylands
dhylands at gmail.com
Date: Tue Oct 17 01:59:46 CDT 2006
Hi Chris,
In addition to what other people have commented, I'll throw in my
comments as well.
If you're serious about targeting the embedded platform, then I would
give serious consideration to dropping C++, or adding it as a wrapper
layer. I've always been a string proponant for C++, but it has a few
downsides.
My first comment is pro-C++. Most of the performance issues relate to
exception handling, and have nothing to do with constructors (unless
they're misused).
My real "issue" with C++ is how crappy the run-time libraries are. I'm
using a gumstix running linux, and turning on C++ pulls in a 500K
library. I am especially disgusted by stuff like cout << 1; winding up
calling sprintf( "%d", 1 ) internally.
So, I'm now coding all my stuff using plain old C and just using good
old fashioned modular programming (aka object oriented techniques).
I'm also in favor of fixed-point math, or as Clem points out, a
mixture where fxed point is used in the performance sensitive stuff.
If you feel tempted to optimize anything using assembler, make sure
that you also have a C version of the algorithim so people who have a
different processor can at least get started using the C version and
then hand-optimize as needed.
--
Dave Hylands
Vancouver, BC, Canada
http://www.DaveHylands.com/
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