Horrible thumbnail/preview performance, constant 100% CPU usage and freeze-ups
So for the last several months, Bridge CC has had terrible performance, with preview/thumbnail generation taking much longer than it ever did in the past, using 100% of CPU resources while doing so, constantly locking up and even locking up overall system function, even with Bridge.exe set to low priority.
This happens on both systems I use (an i7-4790/24GB/GTX 980 desktop, and a i7-4712/16GB/Quadro K1100M laptop). Both are using SSD for storage.
I have:
Cleared bridge cache.
Added dedicated bridge cache SSD to desktop system (no other use)
Updated all CC software to newest versions as available
Done clean installations of CC software, graphics drivers on both systems
Tried "prefer embedded" thumbnails (has no appreciable effect)
Turned off exporting cache to folders
Turned off high-quality previews
Turned off 100% previews
Turned off preview panel
Turned off favorites panel
Read numerous support threads and tried long-shot fixes like removing windows favorites folders and random registry fixes.
I am at my absolute wit's end with this piece of software. Not sure what has changed, but after over a decade-plus of use, I am ready to cancel my CC subscription and take my business elsewhere.
For instance, I just did a fresh Cache purge after the latest CC updates today, and opened a folder of 1200 D850 NEF files. The system sat at 100% CPU (99.8% of it Bridge) with Bridge consuming 14GB RAM, for about 20 minutes before the folder was able to browse or be used. Or the entire PC for that matter, as even with Bridge set to low priority, mouse movement and click recognition was very hit and miss.

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Chris Thurston commented
Having the same problem. Working through 60 images in ACR and starring the ones I want, when I click done its taking Bridge 5 mins to get updated. Never known this before in 20 years use.