将CSV数据解析为Activerecord（MySQL）太慢并且需要HOURS

I'm currently developing a custom ticket system for internal purposes for which I've written a RAILS application for. The ticket data is sourced from another location for which I can only get daily CSV extracts from. I've written a task that FTP's the CSV file locally and then runs the below task to import it into a MySQL DB using ActiveRecord.I'm currently developing a custom ticket system