xfdesktop menu cache

Olivier fourdan at xfce.org
Fri Jul 16 21:45:50 CEST 2004

Hi Brian,

That's great news, I'll try to come up with some benchmarks to see what
it buys us!


On Fri, 2004-07-16 at 21:21, Brian J. Tarricone wrote:
> hi all-
> i just committed a caching system for the xfdesktop menu.  basically, as 
> it's creating the menu, the cache creates a tree structure (using 
> GNodes) to describe the menu.  after the menu's done, the tree gets 
> written to an XML file, in the same format as ~/.xfce4/menu.xml.  in 
> another file, i store a list of all the relevant menu files and .desktop 
> directories along with their mtimes, to check for cache validity.  on 
> startup, xfdesktop reads this file, checks the mtimes, and matches them 
> against the values in the file.  if there are filesystem changes, we 
> redo the menu, if not, we simply parse the cached XML file instead of 
> ~/.xfce4/menu.xml.
> just to confuse the issue (^_~), the cache files are stored in 
> ~/.cache/xfdesktop.  i'll change it when we decide on what to do about 
> the config dir structure.
> this could use a lot of testing, though it appears to work ok for me.  
> happy bug-hunting!
> on a side note, i've been urged to do the menu generation in a separate 
> thread.  i don't think this will buy us anything, because the menu 
> generation is very gtk-heavy, so i'd have to wrap the _entire_ thing in 
> a big gdk_threads_enter()/gdk_threads_leave() pair, and any other 
> gtk-related stuff in the main thread would get blocked anyway.  as it 
> stands, the initial menu generation (when xfdesktop starts) is idled via 
> g_idle_add(), and xfdesktop connects to the session manager before this 
> runs, so it's about as fast as it can be, IMO.  if anyone has any better 
> ideas (aside from rewriting it to be faster - hah), please let me hear 
> them.
> 	-brian
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 - Olivier Fourdan - fourdan at xfce.org - http://www.xfce.org - 

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