Remove stream usage from Symtab.lookupPackage()

[christoph.dreis at freenet.de]

Hi,

I'm currently profiling some compilation phases of internal projects and noticed in allocation profiles that Symtab.lookupPackage takes up ~2% overall. The majority of this is spent in .stream().anyMatch() usages to find out if the given module symbol depends on the unnamed module.



The PR under https://github.com/openjdk/jdk/pull/12700 desugars the code into a simple loop.

If you think this is worthwhile I'd appreciate if this is sponsored. I'd also need a ticket number for that because I can't create tickets. CLA should be signed though.

Let me know what you think.
Cheers,
Christoph




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