HikariCP 1.2.7 has been released and the artifacts published to the Maven Central Repository.
Changes between 1.2.6 and 1.2.7
*) Finally achieved performance parity between the generated delegates
and the former method of instrumenting driver classes directly.
*) Improved generated delegate code. Removed unnecessary casts, moved
to a static proxy factory rather than a singleton (performance win).
*) Improved performance of FastStatementList (primary source of speed-up
to reach parity with former instrumentation code).
*) Removed aliveness check on connection creation.
*) Track connection isolation level and only reset if the state has
become "dirty". Avoids unnecessary round trip to the DB during the
*) Added interface IConnectionCustomizer and related HikariConfig
property 'connectionCustomizerClassName' to allow users to specify
a connection customization implementation.