Same performance problems with Windows 10 / Cryptomator 1.4.2 / HiDrive (connected via webdav) / Dokany.
Problem with large files therefore also not resolved: Cryptomator fails to write larger files to vault - #6 by Perrycox
Edit: Dokany test as described here For Version 1.4.0 and higher: Is it Dokany or just me? (or maybe Cryptomator :-P) is working fine.
Cryptomator Log shows
19:49:44.542 [main] INFO org.cryptomator.launcher.Cryptomator - Starting Cryptomator 1.4.2 on Windows 10 10.0 (amd64)
19:49:44.629 [main] INFO o.c.launcher.FileOpenRequestHandler - Unable to setOpenFileHandler, probably >not supported on this OS.
19:49:45.119 [JavaFX Application Thread] INFO o.c.launcher.MainApplication - JavaFX application started.
19:49:45.195 [JavaFX Application Thread] INFO o.c.common.settings.SettingsProvider - Settings loaded >from C:\Users.…
19:49:45.318 [JavaFX Application Thread] INFO org.cryptomator.jni.JniModule - loaded WinFunctions.dll
19:49:45.369 [JavaFX Application Thread] INFO o.c.ui.controllers.MainController - Unable to >setPreferencesHandler, probably not supported on this OS.
19:49:46.436 [JavaFX Application Thread] INFO o.c.ui.controllers.WelcomeController - Current version: 1.4.2, lastest version: 1.4.2
19:49:46.586 [Background Thread 1] INFO com.dokany.java.DokanyDriver - Dokany version: 100
19:49:46.586 [Background Thread 1] INFO com.dokany.java.DokanyDriver - Dokany driver version: 400