[GR-52560] Size regression from GraalVM CE 23.0 to GraalVM for JDK 21 (CE) for `byte[] for code metadata` about graal HOT 2 OPEN

Hi @SergejIsbrecht, we have noticed this as well and documented our findings in https://quarkus.io/blog/mandrel-23-1-image-size-increase/

TLDR:

According to our analysis the binary size increase is attributed to two distinct changes, both of which are necessary for getting more accurate profiles when using the async-sampler.

• Add support for profiling of topmost frame
• ProfilingSampler does not need local variable values (specifically the commit “Always store bci in frame info”)

Using --strict-image-heap results in a worse binary size.

That's interesting.

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@christianwimmer , @thomaswue

any thoughts on this topic? I think 15 MB increase are quite substantial for features I don't even know I need, because Perf gives me everything I need with frame-pointer.

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