On Thu, May 08, 2014 at 03:46:15PM -0500, Dick Hollenbeck wrote: > I think for the guy who does not trim down his fp-lib-table to an interesting > subset, may > soon be trying to load a lot of footprints, maybe even unknowingly.
Aren't footprints loaded on demand? IIRC that was one of the reason for the pretty library format. Currently I find the slowest thing in pcbnew is re-preparing the drawing (like when you toggle zone visibility). Profiling ages ago shown that most of the time was spent computing distances that weren't used anyway. Loading/saving may be not blazing but it's a way rarer occurrence, usually. > I do feel speed is important, but I am not sure how much slower the DOM > parser may be, and > that is why a measurement is a good thing. Could be quite slow, I agree with that. A lot of that depends on the actual kind of structure used by the DOM tree; another point I think will matter is string comparison, since I don't think there is some internation/hashing ongoing in that parser. With interned strings a string comparison is a pointer comparison, otherwise its strcmp time. With that lot of keywords to handle probably it would make a difference. If the technique interest you and don't know it yet, try looking at gperf, the current keyword recognizer could be probably enhanced that way. IIRC the current lexer uses dynamic hashing which is still a good way to weed out strings so maybe the gain wouldn't be spectacular. > Are you having any luck with lisp on your pic? Actually there are lisp subsets targeted to the higher end pics (mostly toys, however). The saturn processor in the HP calculators is underspecced against current PICs, it just has a lot of memory strapped on. Too bad core memory is not plenty in the usual pics we use (32-256 bytes:P), they are designed to be assembly based... some people like to use them with forth but I never tried it. -- Lorenzo Marcantonio Logos Srl _______________________________________________ Mailing list: https://launchpad.net/~kicad-developers Post to : [email protected] Unsubscribe : https://launchpad.net/~kicad-developers More help : https://help.launchpad.net/ListHelp
