AOT is nice for startup time, but there are tradeoffs in the other direction for long tail performance issues in production.
There are JITs that use dynamic profile guided optimization which can adjust the emitted binary at runtime to adapt to the real world workload. You do not need to have a profile ahead of time like with ordinary PGO. Java doesn't have this yet (afaik), but .NET does and it's a huge deal for things like large scale web applications.
Java definitely does have that, although maybe not in the most commonly used JDK distributions. E.g. companies needing ultra-low latency even before the first request, would use Azul JDKs like Prime (paid), pre-train the profile in non-production environments, and then use it in production on new version deployment.
There are JITs that use dynamic profile guided optimization which can adjust the emitted binary at runtime to adapt to the real world workload. You do not need to have a profile ahead of time like with ordinary PGO. Java doesn't have this yet (afaik), but .NET does and it's a huge deal for things like large scale web applications.
https://devblogs.microsoft.com/dotnet/bing-on-dotnet-8-the-i...