I’m currently running Darktable 2.0.5 on two systems. One is a Linux Mint 18 
box with an 5930K, 32GB of RAM and GTX 970.  The other is a new MacBook Pro 
retina I recently picked up with the mobile 2.8Ghz i7, 16GB of RAM and R9 
M370X/Iris Pro. I’ve have the default core settings on both as far as memory 
and threads go. I’ve fed about 40K images to it on both machines (I keep my 
files synced with rsync over the network) and the Linux box absolutely flies. 
The lighttable module is like butter as they say. Adjustments in are quick too.

However on the Mac it’s become rather slow. Every once in a while I’ll blow 
away my .config/darktable/library.db file and let it rebuild overnight. This 
seems to help for a  short time but then things just get bogged down again 
eventually. The library.db files on each machine are stored on SSDs. It’s 
always been slightly slower on my Macs but I used to attribute it to having 
some older Mac hardware. Now with the new system it’s not a mcuh faster. I’ve 
tried enabling/disabling OpenCL and that doesn’t make much difference either 
way. Increasing some of the memory available for thumbnail caching and 
restarting the program doesn’t seem to make much difference either way so I’ve 
put it back to the standard 500MBl. Adjustments get pretty slow too. Any tips 
on something to look for or a way to speed it up on OS X? As far as I can tell 
the settings between the two systems are identical and mostly default. I do 
usually set it to apply camera specific base curves but that’s really the only 
setting I’ve messed with outside of metadata. 

Thanks!

Leander____________________________________________________________________________
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