Google Cloud SQL is a fully-managed MySQL database service.
Google Cloud SQL is easy to use. It doesn't require any software installation or maintenance, and scales effortlessly for demanding applications. Cloud SQL automates replication, patch management, and database management.
Pythian has evaluated the performance of Google’s Cloud SQL Instances using MySQL Workbench.
They provide a break breakdown of their methodology, but the last line says it all (Spoiler Alert!)
Google Cloud SQL High Performance instances performed significantly better than currently being offered Google Cloud SQL Standard Class Instances by a scale of 100-200%
But don’t let that spoil your interest. If you any amount of time in the db, you’ll find their post chaulk full of goodies.