135thAirhacksQ&A.md

135thAirhacksQ&A.md

Ask questions and see you on 3 June at 8pm CET: youtube.com/c/bienadam

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Hi @AdamBien , @lprimak,

I tried Payara Micro with 24, it doesn't start on Java 24. On Java 21, with clustering disabled, starts the same thing in 8 seconds.

Embedded GlassFish runs on Java 24 and starts a REST app in 5 seconds. Running it with Project Leyden's AOTMode on Java 24 fails, so it's not possible to take advantage of it yet.

Quarkus starts the same thing in 1 second, on Java 24. So, clearly, Quarkus still starts much faster than Payara or GlassFish. Hopefully Payara or GlassFish will be able to take advantage of Project Layden soon, but we're not there yet.

Sometimes startup times matter, sometimes not. @AdamBien, where do you think startup times matter, and where it's better to use standards like Jakarta EE and MicroProfile, even if the startup time is a few seconds longer?

Payara will have JDK 24 support with the next release (6.2025.6 I believe), GlassFish should have it currently as well.

I have been running tests on my own branch of Payara that speeds up deployment times by caching with Jandex.
My assumption is that Leyden speedups will be on par or better than the Spring Boot that are there now,
but I haven't tested those yet.

When all of this "comes together", startup times will be much improved for both Payara and GlassFIsh and should be at least comparable with Quarkus, but obviously not proven quite yet.

If (when?) my branch with Jandex / Payara will be viable, deploy performance will be improved 2-5X current, even without Leyden.