I've been using 1Password5 for quite some time. The problem I have has been there since day 1. I save my vault to a directory on a local drive. This directory is synchronised with my private cloud (Synology Could Sync). Since I use 1Password on multiple devices some from Apple I use my Mac as a wifi server for other Apple devices. Every time I open 1Password (via browser's extension or using 1Password app itself) it start hitting my CPU severely - 200-400% on 1Password process and approx 100% on 1Password mini process.
How to solve that? I read other threads about similar issues but hints provided there did not help. I tried disabling Wifi server function, disabling my cloud sync service, creating new directory and moving all the data there. None of that worked
1Password Version: 5.3.2
Extension Version: 4.4.3
OS Version: OS X 10.10.5
Sync Type: Sinology could sync