Do you really think, Lightroom, Capture One and others go the "GPU-route", because they just want to avoid "any real work"? I guess, they would be glad, if they could stick to the CPU-route. GPU just introduces more possibilities for bugs, which are GPU driver related etc. They went the GPU route, because it seems to be the only way, to get a fast onscreen reaction, especially on high-res displays, which will be more common in the future anyway. I have a pretty old (Intel Q6600 and GTX 750Ti) and a very new PC (6core Haswell E and GTX 970). On both machines, the GPU makes the develop module react much faster, actually realtime, even if I spread Lightroom across my 3 monitors (2x19" and a 1920x1200). Much faster than without GPU and much faster than LR 5.x).I even tried large HDR panos and raw files from a 5DS. I admit, that under certain circumstances, the brush may be slow. I admit that after zooming it may take a second to get the picture sharp. But I`m pretty sure, this will get better in the future, because, as Eric said, this is only the beginning. And even at that stage, I prefer the GPU enabled LR6 much to LR5 in terms of speed. And my old PC is for sure not one of the "1% that have top line computers". It would also be helpful, and I do not mean any person in special here, to be as precise as possible in describing what actually is slow. If someone writes "Zooming is slow", what does it mean? Is it stuttering with slow framerates or is it taking time to become sharp? If going from one image to another is slow, what previews do you have, where are they etc.. What GPU/driver you you have? Have you tried other drivers, especially in case of having an AMD card? If brushing is slow, what are your brush settings? Do you brush "exposure", "sharpness" or whatever? Being as precise as possibe will help Adobe find out, what can be improved.
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