[Steven Zahm]

@ christian

re: I seem to freeze every 1k or so.

hmmm… that is indicative of a background PHP error. If the server responds with an error instead of the expected reply, the javascript which processes the chunk importing will stop.

Suggestion would be to make sure all PHP error reporting is either disabled or logged, my preference is the latter. Best practices dictate all PHP error reporting be suppressed on a production site so it does not expose potentially sensitive server info.

It is possible the error was logged, it may be worthwhile to look in the PHP error log to see if there seems to be anything related to the import.