P: Quick Develop VERY slow on my system (6 sec vs 1 sec in LR 5.7)

I'm having the same slowness issue. My LR 5.7 was fine, but LR 6 is SLOW doing EVERYTHING. For example, when changing to the next picture in Loupe mode, the keywords take 5.-7 seconds to load.

I am having same SLOW issues with LR CC. Tried resolution changes, etc but LR 5.7 is 50 times faster. I have solid state hard drive, i7 prosessor, 8 GB Ram, etc No issues with LR 5.7 but CC is not working for me. It is so slow and if editing hundreds of photos, eventually crashes.

I've now switched off my gpu support, and put the preview quality at its lowest and reduced the cache size to whatever LR suggested (40GB - would this make a difference to speed of LR in general?) Previously I had it up at 80GB.
I assumed that if my processor could handle it, then a bigger cache might speed up performance.
But still LR is sluggish, and only really since I installed the latest CC update last week. Another major delay is when exporting images, the delay before LR even starts doing anything (and the task bar comes on) can be up to 30 seconds, where it always used to be under 5 secs.
I'm using a imac, 2.7GHz Intel Core i5, 16GB RAM, and it's about 5yrs old. Has latest version of Yosemite on it - 10.10.3

Go to lightroom preferences - performance and uncheck "use graphics Processor"

i had to disable gpu and it got much better, but the import is very slow, and lightroom becomes unusable. well pretty much if any process is being done it the background i cant use lightroom.
didnt have this problem with previous version.

I have tha same problem in develop moule.

In develop or library?

I was on LR 5.7 and also am having problems with Lightroom 6 being very slow after converting my image folder to LR6 the image loads much slower and if I delete an image it moves to the next thumbnail image but then wont allow any further motion back or forward. I have to then re-click on the thumbnail to move backwards or forward on the image thumbnails along the bottom of the screen.

LR5.7 if you delete an image it will then move to the next image and you can move backwards or forward along the thumbnails.

This is very frustrating and must certainly be a bug in LR6?

Simon,
I really appreciate the extra effort and help you are giving here.
I'll take your info and try it.
Thanks
-Dave