Performance issues of Lightroom after updating to the new iMac

I used an iMac 2013 end with 3.5 Ghz i7 and 3 TB Fusion Drive and 32 GB of RAM and had very good performance.

I've recently updated to an iMac of retina with i7 4.0 Ghz and 512 GB SSD and 32 GB of RAM. I also bought an external LaCie Big 1 TB drive which has 1 300 MB/s read/write speeds and put my Lightroom library, photos and ACR cache on this drive.

In view of these changes, I expect an increase in the performance of my previous system. However, I see the opposite. In Lightroom when I apply a preset, I sometimes get a beach ball of rotation for a few seconds before she applies. In Photoshop, using the Google Nik filters, I when I move the sliders effect is not instantaneous as it used to be; Instead, I see chunks of the screen redraw.

All other applications on my system seem to work very well. Photoshop and LR open both faster than they on my previous iMac. But their use seems slower that me perplexed.

Any ideas?

I guess the beach ball, that you see is the generation of the 1:1 Preview or how long it takes to calculate overall gross instead of a preview of lower res. The display on these new iMacs is so gigantic that the standard preview size is way too small (the max is 2880 pixels long, which is a factor of 2 too small for the retina display). The machine of the retina has 4 x as many pixels as the iMac 27 "older. The difference in speed between 4.0 Ghz and 3.5 GHz is not enough to compensate for this difference in number of pixels that should be calculated from the raw to catch up so you should see a decrease in the speed if you're using Lightroom full screen. Try the Lightroom window about 1/4 of the screen and see if that changes things.

Tags: Photoshop Lightroom

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