Hi Leander, 

I am also experiencing disappointing performance in darktable on a new
Macbook Pro. Same model as yours I believe: 

Mid 2015, 2.5 GHz Intel i7
16 GB Ram
Intel Iris Pro
AMD Radeon R9 M370X - 2 GB Ram 

When you enable OpenCL, and open an image in the darkroom module,
doesn't it turn the photos green? It does on mine. There is a known bug:
https://redmine.darktable.org/issues/10274 

I would really like to compare the performance once OpenCL is enabled,
but obviously I can't. 

At times, I experience major slow down in the darkroom module when
simply editing 10 or so images. The more edits I make, the slower it
gets. I think it happens mostly when using masks. 

It gets so slow, I can't click on any drop down menus or make further
edits. Darktable just hangs. 

Do you experience this at all? Or just in the lighttable module? 

I was expecting a big performance increase from my older 2012 Macbook
Pro, but that hasn't really been the case.

Riley 

On 2016-08-15 15:31, Leander Hutton wrote:

> 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 th
 e only
setting I've messed with outside of metadata. 
> 
> Thanks!
> 
> Leander____________________________________________________________________________
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