I am very impressed with Fast Raw Viewer Iliah. I appreciate the opportunity to comment on this beta you have made available. For this type of program I am looking for speed and ergonomics. The gold standard for me is Photo Mechanic.
Speed
I tested on a i7 3 GHz with 16GB and a nVidiiia 7900GS display adapter (with latest drivers) on Win7 64x reading a Lexar 400X card over a USB3 connection. The performance was good but there was a 0.6 second hesitation between images. This pause is the same viewing the RAW or internal JPEGs. The delay does not change if I give the program time to cache. By comparison, there is virtually no delay between images using Photo Mechanic on my system.
Ergonomics
While reviewing images I want to focus on the images, not the keyboard. I keep one hand on the keyboard and the other works the mouse. The keyboard shortcut editor is excellent but does not quite do enough. I want all my fundamental actions to be a single key, not a combination. Also, in my workflow, I pick a few winners rather than a lot of rejects - I find this more efficient - and I mention this to clarify following comments.
The primary actions are forward, backward, zoom and select. Ideally, I would like the forward, backward and zoom functions to be done with the mouse. The forward and backward keys on the mouse work - excellent! I really like the zoom function used in Lightroom, where a single mouse click zooms to the click spot and another click toggles the zoom back out. Could you make this an option?
The other function, selection, should be a toggle function. Since ratings and/or labels are used as a selection criteria it would be useful to make them all toggle on/off. For example, if I decide I am going to use RED as a selection criteria I would like to be able to press the same key to turn RED on and off. This way I do not have to pick different keys on the keyboard.
Another function that is important in image review is compare. I may have 20 similar shots and I want to pick the one winner. Some form of filtering, to winnow down to the final pick, is very important.
Finally, when I have picked the winners, I want a way to quickly review the selection in context with all the images to make sure I did not miss something. In Photo Mechanic I can quickly zip through the thumbnails to double check. For me, this is important, and I frequently catch something I missed, either through a keying mistake or a change of heart after seeing all the images.
Fast Raw Viewer is very impressive, especially for a beta, and I want to thank you for making this available Iliah. I would consider using it instead of Photo Mechanic if the performance is "instantaneous" (perhaps a function of my hardware), toggle is added to ratings and labels, 100% zoom is added to mouse click, compare functionality is included and a thumbnail window is added.
Best regards
Rory