With all respect to Percona - but why use third-party HandlerSocket instead of an own Percona solution ?
Percona developers could create a native Percona plugin what allows to perform some of MySQL operations (simple ones only) like SELECT or INSERT - but applying to MySQL as to NoSQL - same what HandlerSocket does.
It can be used by own Percona syntax for such commands, let’s say
SELECT id, title, date - applies to MySQL using standard way, but specific syntax like
SELECTNS id, title,date - or - INSERTNS id, title,date - Percona understands as NoSQL query and perform it accordingly using a native analog of HandlerSocket.
It would be ideal for simple bulk operations where language is simple but SPEED is important.
Just an idea for developers, but why not ?
Great successes to Percona team anyway !