从本地计算机连接时，AWS RDS会非常慢

I have an AWS RDS instance up and running. When the DB is queried from my website (also on AWS, same region) it runs beautifully. But, if I try to connect to the database from my local developments machine it takes AGES for any query to execute. Does anyone know why? I have opened up the security group to allow connections (while i try to connect from the local machine).I have an AWS RDS instance up and running. When