OpenJDK 8/11 vs. GraalVM 20 vs. Amazon Corretto JVM Benchmarks Written by Michael Larabel in Software on 25 March 2020 at 02:00 PM EDT. Page 1 of 5. 32 Comments. Following last week's benchmarks of OpenJDK 8 through the newly-released OpenJDK 14 JVM benchmarks, some Phoronix readers expressed interest in seeing Java benchmarks with Oracle's GraalVM as well as Amazon's Corretto JVM implementations.