Perceived performance could be substantially improved by having VisualEditor optimistically request serialization of the DOM as soon as the user hits "Save page". If the user ends up canceling the save, the serialized DOM would be discarded.

Users that take a few seconds to write the edit summary before confirming the save would experience near-instant saves this way.

Version: unspecified
Severity: enhancement
See Also:
https://bugzilla.wikimedia.org/show_bug.cgi?id=55979