With DT full screen, If I set the lighttable zoom to show 5 images across, it is rather slow (as previously mentioned). If I leave it at that zoom level but re-size the darktable window within the window manager (so the images are smaller, but still 5 images across and same number of images shown in DT as before), the performance greatly improves. I assume this is due to the same reason that the performance improves in full screen by zooming out.
On Tue, Jan 19, 2016 at 8:31 PM, Scott <spectre...@gmail.com> wrote: > I ran 'darktable -d perf -d lighttable' to get the lighttable output > and sent it to a text file, opened up darktable and moved the cursor > around a bit, parsed the file to grab the lines with the total time, > '[lighttable] expose took #.#### sec', and output the maximum and mean > times listed. Here are some results. > > 1. 54 pictures, all default settings -> max 0.14, average 0.07 > 2. Same library, turn off color managed thumbnails -> max 0.12, average 0.033 > 3. Same library, turn on color managed thumbnails, run > 'darktable-generate-cache -m 7' -> max 0.15, average 0.09 > 4. Reset darktable (remove ~/.cache/darktable and > ~/.config/darktable), import just 5 pictures, then run the same test > -> max 0.04, average 0.01 > > It feels like the timing with the first tests is greater than 0.14 > seconds, but my feeling is probably wrong. Regardless, it is *very* > noticeable and the test does support my observations that turning off > color managed thumbnails improves the response a little bit, but not > drastically and that the response time is great with just 5 pictures > instead of ~50 pictures. > > I also tried playing with the option 'memory in megabytes to use for > the thumbnail cache' and the two memories related to tiling, but > neither seemed to have any noticeable effect. > > Are there any other tests I can do to help debug this? Darktable is > great, but it is rather frustrating to use like this. > > -Scott > > On Mon, Jan 18, 2016 at 11:32 PM, johannes hanika <hana...@gmail.com> wrote: >> heya, >> >> sounds worrying, i'd like to get to the bottom of this. >> >> i guess the long term best solution would be to instruct cairo to only >> expose whatever thumbnails are changed when moving around with the >> mouse (but i tried quickly, it's not trivial to do and still work with >> all features). >> >> darktable -d perf -d lighttable >> >> is what you want to use to get timings for lighttable btw. >> >> -jo >> >> On Tue, Jan 19, 2016 at 5:45 PM, Scott <spectre...@gmail.com> wrote: >>> Hello all, >>> >>> I'm having an issue since upgrading to Darktable 2.0 (Pascal's PPA). >>> When in lighttable, if I just move my cursor around it takes ~1/3 >>> second before the thumbnail under the cursor is highlighted and the >>> "image information" updates to it. Searching the bug tracker and >>> archives show that I'm not the only one with this issue, but I haven't >>> seen any fixes for it. A couple references: >>> http://redmine.darktable.org/issues/10764 >>> http://sourceforge.net/p/darktable/mailman/message/34654461/ >>> >>> I have: >>> - Ubuntu 14.04 LTS >>> - 16 GB of RAM >>> - GeForce GTX 650 Ti BOOST (proprietary drivers, ) >>> - Intel Core i5-3570K (4 cores @ 3.40Ghz) >>> - All photos in my library are Canon CR2 >>> - 27" monitor (Dell U2713HM) is calibrated using dipcalGUI and set to >>> 2560x1440 resolution >>> >>> The first few things I've tried: >>> - Running darktable-generate-cache >>> - Running with '-d perf' (but it doesn't print anything when I simply >>> move the mouse around the screen) >>> - Changing the number of background threads >>> - Running with and without OpenCL >>> - Turning off color managed cache (this gave a slight improvement, but >>> still much slower than DT 1.6.9) >>> >>> I then deleted ~/.cache/darktable and ~/.config/darktable, and >>> imported only 5 pictures and the response time seemed very quick. I >>> then added a folder (50 images) and the response time lagged again. I >>> also noticed that it seems to depend on how zoomed in the images are >>> in lighttable. If I zoom out so the thumbnails are very small, then >>> the response time is good. As I zoom the thumbnails larger, this >>> response time gets worse and worse. 5 images across the screen seems >>> to be the worst, and then as I zoom in even closer it gets slightly >>> better. >>> >>> I then imported some more pictures so that I have nearly 200 in the >>> database/cache. Now even when lighttable is zoomed as as far as >>> possible, the response time is very slow. >>> >>> Possible output request: >>> $ ldd `which darktable` | grep gomp >>> libgomp.so.1 => /usr/lib/x86_64-linux-gnu/libgomp.so.1 (0x00007fa6da138000) >>> >>> Does anyone have any other recommendations to try? >>> >>> Thanks, >>> Scott >>> >>> ------------------------------------------------------------------------------ >>> Site24x7 APM Insight: Get Deep Visibility into Application Performance >>> APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month >>> Monitor end-to-end web transactions and take corrective actions now >>> Troubleshoot faster and improve end-user experience. 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