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1,457 bytes added ,  12:00, 19 September 2012
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'''Flight dynamics'''
 
'''Flight dynamics'''
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'''Navigation Database'''
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=== NavCache ===
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James has pushed a large change to next, which adds a binary cache of most of  the navigation data. The cache is stored in FG_HOME/navdata.cache, and rebuilt if the timestamps on any of the data files change (apt.dat, nav.data, fix.dat and so on). When the cache needs to be rebuilt, startup will take a bit longer  than before, but when the cache is valid, startup is /much/ faster, especially for debug builds:
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{{cquote|Memory consumption is also lower, since we don't keep airports / fixes /  taxiways / runways in memory until they're needed.
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This is a fairly large change, so please look out for any bugs related to navaids / startup position / GPS / route-manager searches and lookups either getting different results or failing. I've tested here locally and things seem
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sane, and have had positive feedback from various testers on IRC and email, but I still expect to find some edge cases which need further work.
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There's future work to move even more data into the cache - eg parking positions - which will further help performance for FMS / map systems since we won't need to parse lots of XML data repeatedly. I'm going to let this change settle down before adding more cached data, however.<ref>{{cite web |url=http://www.mail-archive.com/flightgear-devel@lists.sourceforge.net/msg38330.html |title=[Flightgear-devel] Nav-cache|author=James Turner |date=Wed, 19 Sep 2012}}</ref>}}
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<references/>
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'''Random Buildings'''
 
'''Random Buildings'''

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