save file should occur without freezing editor

Saving files opened from a remote disk (eg, ssh) can take a long time depending on the internet connection. During this time, the editor is unusable/frozen. It would be nice to be able to continue working with the other files at least while the save is working. For example, each open file could operate as a separate computing process (like each tab Google Chrome) so that what's happening with one file doesn't affect the usability of the others.