2006/6/15, Frederic Bouvier <[EMAIL PROTECTED]>: > Olaf Flebbe wrote : > > Hi, > > > > let me comment on the current apt.dat performance i.e. > > > > of the time spent in fgAirportDBLoad: > > > > ~25% of time time is spent in simgear::strutils::split > > ~10% is spent in atof() > > > > Measured with Intel VTune using MS Visualc C++ 2005. > > > > IMHO it is an indicator that we should not use a plain text format. I > > have no experiences with the performance of binary XML > > representations. > > > > There is not much information here. If you tell us what cost us > fgAirportDBLoad in the whole initialisation process, we could decide if > it's worth optimizing it.
Reading the airportlist needs roughly half of the startup time. > And you're missing a bit of history here : The airport file used to be > binary and it was decided that a text file was easier to maintain. No > endianess or integer size problem, no compilation phase. MetaKit was a > PITA at the time. I didn't know this. Was there an attempt to create a binary representation on-the-fly when a new apt.dat was detected? Cheers Olaf _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
