Corretto, the build of the Open Java Development Kit with long-term support from Amazon, has been updated to support the latest release,18, of OpenJDK.
The first general availability of Corretto was for OpenJDK 8, released on January 2019 - see our report of the December 2018 preview. Since then Corretto became the default OpenJDK distribution on Amazon Linux 2 and everywhere Amazon runs its services.
Corretto includes patches from Amazon that have proven useful in running their own services, but other than that it is at par with the rest of OpenJDK distros (TCK tested) and therefore can be used interchangeably. These patches include security fixes, performance enhancements, garbage collection scheduling, preventing out-of-memory situations, as well as improved monitoring, reporting, and thread management. What is important here is that Amazon upstreams its patches to OpenJDK, thus benefiting the whole OpenJDK league.
full article on i-programmer: