So long as you aren't in a docker container, The openjdk can do fast startup pretty trivially.

There are options to turn on which cause the JVM to save off and reload compiled classes. It pretty massively improves performance.

You can get even faster if you do that plus doing a jlink jvm. But that's more of a pain. The AOT cache is a lot simpler to do.

https://openjdk.org/jeps/514