Keith_Reeder wrote:
So what's your OS, D? That's likely to be a significant detail, too.
D Fosse wrote:
I suspect the original question should be qualified - and quantified - a bit. One person's "working fine" is another person's "glacially slow", and snappy adjustment sliders could well be paired with slow and laggy photo switching. So what your priorities are affect the answer. And how fast is "fast"?
Any action I take in Lr is effectively instantaneous - including moving from image to image: too quick to time. I'm not a pro, but as a wildlife/sport photographer I routinely come home with high three figure, and sometimes four figure counts of images: admittedly I do my culling outside of Lightroom, but what's left often numbers in the hundreds, and it's no problem. - Lr isn't "tolerably quick", it's fast.
I suspect D Fosse is talking about reviewing images in the Develop module and Keith_Reeder in the Library module. I build Standard Previews on Import and review & select images for processing in the Library module, which is as Keith_Reeder says is instantaneous. As D Fosse states I also see about a "two-second lag" in the Develop module before the 'Loading' popup goes away. But I can start adjusting the Develop module controls in ~1.0 sec., which doesn't impede my workflow. IMHO the Develop module is the wrong place to do image review. It uses a simpler interpolation (Bilinear?) to create the Fit and other <1:1 Zoom views. This produces an image that appears sharper than "reality." The Library module uses preview files containing an image pyramid (1:16, 1:8,1:4.....1:1), which is rendered using high-quality Bicubic interpolation. Bicubic is the same interpolation used by all of LR's output modules, including the Export, Slideshow, Print, and Web modules. WYSIWYG - What you see is what you get in the Library module.
After an image set has been worked on in the Develop module I switch to the Library module, select all of the images and build 1:1 Previews. The images can then be reviewed and scrolled through instantaneously in the Library module at ANY Zoom view size. Full Screen mode in the Library module slows down the review process to about 1.0 sec. per image, so I rarely use it. What works better is Full Screen and Hide Panels mode (CTRL +SHIFT+F), which is almost as fast as normal screen mode on my system. Give it a try.
I'm on Windows 7 and using a 2560 x 1440 monitor, which is ~1.8x the pixels of a 1920 x 1080 monitor. The higher the monitor's resolution the longer it will take to build the Library screen preview and likewise the Develop preview. The current GPU implementation only works in the Develop module, but on my system (Nvidia Quadro 600) actually slows down some operations. It always a good idea to try it both ways.
