title: Differences Amazon Corretto and OpenJDK
body: <p>What are the differences between <a href="https://aws.amazon.com/corretto/" rel="noreferrer">Amazon Corretto</a> and <a href="https://openjdk.java.net/" rel="noreferrer">OpenJDK</a> (and <a href="https://jdk.java.net/" rel="noreferrer">Oracle's OpenJDK</a> - but there is already a ticket about <a href="https://stackoverflow.com/questions/22358071/differences-between-oracle-jdk-and-openjdk">this</a>)? Corretto is a OpenJDK version 8 implementation. Both are free and seem to run on most systems (Linux, Mac OS and Windows). So far Corretto is only in preview, but this will change soon. Corretto's <a href="https://docs.aws.amazon.com/corretto/latest/corretto-8-ug/what-is-corretto-8.html" rel="noreferrer">documentation</a> doesn't say much about differences. Are there differences in e.g. performance, garbage collection? Why would I prefer one over the other? Would you use Corretto outside of AWS?</p>