I have the same issue on Windows 10 with a new Lenovo Y520 Legion laptop. I reboot the machine every day.
As I'm typing in Evernote, the cursor freezes periodically (it happens frequently - sometimes every line) for a half second or so (occasionally longer) - frustrating.
I've tried disabling my anti virus, disabling spell check in Evernote, decreasing the synchronization frequency, but nothing seems to help. Task manager doesn't show unusual CPU spikes or anything while I'm using Evernote. The log file doesn't have any obvious error messages.