I believe a variant of: "It is a well-known fact that those people who must want to rule people are, ipso facto, those least suited to do it... anyone who is capable of getting themselves made President should on no account be allowed to do the job."
... applies to code reviewers.
I like Google's review standard:
"In general, reviewers should favor approving a [PR] once it is in a state where it definitely improves the overall code health of the system being worked on, even if the [PR] isn’t perfect."
Azul is popular in low latency financial services. A usecase might be to reduce the variance that JIT compilation introduces to transaction latency, especially at the high percentiles.