[Plugin: AutoChimp] Sync user timeout

I’m trying to sync users between wordpress and mailchimp but it require too much time and website open a “page not found”.

Instead I’ve tried to export by sql all wordpress users and then uploaded them in mailchimp. Of course, this worked.

My questions are two:
1) It’s possible change sync script to run less queries for every pass (I think that the timeout server is connected to the number of queries).
2) If I imported users in MC from SQL and I don’t sync manually by AutoChimp, when a new user will be added, will the plugin add him to MC list?

Tnx

http://wordpress.org/extend/plugins/autochimp/