wp_insert_post – duration

i try to import a custom DB to the WP DB with about 2000 rows (custom post type).
the problem is that the insert by wp_insert_post takes about a second per insert.

Is this normal ? Is there a fast/alternative solution… I think that a insert query should not take over some milliseconds.

Edit

its a remote server and both databases are on it. the queries are in quite normal speed (already tested), just the inserting is the problem.

Need some code ? Ask in comments..

thanks guys.