Hi,
I have this problem already for almost 2 years and I cannot seem to find a solution for it. And I am not the only one: https://adobe-video.uservoice.com/forums/911233-premiere-pro/suggestions/33849352-save-thumbnails-ca...
The generating of thumbnails in the project window is annoyingly slow. It really is the only thing in Premiere that slows the whole editing process down. Example: https://www.youtube.com/watch?v=UbCvkeJvLv4&feature=youtu.be
It is not really the generation of thumbnails itself I believe. The thumbnails can generate quite fast, but Premiere only generates the ones that are visible in the project window at that moment. So the moment I scroll down it has to generate those that become visible...than I have to wait...scroll down...etc. Only this way I can make all the thumbnails instantly available when needed. But once I close Premiere...and start up the project a next time it all starts over again. The thumbnails don't seem to be generated all in one time and also don't seem to be saved or cached in a way.
I already tried a lot, tweaking with cache settings. Using another drive especially for my cache, etc. But more and more am I convinced it is a Premiere problem, or am I (and the other people that voted on Adobe User Voice) doing something wrong here?
The files in the example movie are 1080p, 10-bit, h.264, 4:2:2 .mov files, straight from a GH5 camera. But I get the same problem with 8-bit files and other codecs/container formats.
My system setup is: I7-5930K processor, 32 gb of RAM, Geforce GTX 1060 6gb and I edit from a internal Samsung SSD 970 PRO 1TB M.2 NVMe drive (where also my cache directories are located...not ideal, but should be fast enough). I also tried to put my cache on another internal HDD (7.200rpm), but get the same results. Besides that I have the latest version of Premiere, latest version of windows 10 and I update my hardare drivers regularly.
Also good to mention that my OS and software is installed on a seperate SSD and that the Samsung 970 PRO is only used foor footage, project files and the caching.
The slow thumbnail generation was the reason for me to buy the Samsung SSD 970 PRO 1TB M.2 NVMe hoping it would speed up the process and also to try Davinci Resolve which indeed is much faster with stuff like this...but sadly has its own flaws.