On Tue, 3 Sep 2024 15:50:13 GMT, Thomas Stuefe <stu...@openjdk.org> wrote:
>>> > I don't think the costs for two address comparisons matter, not with the >>> > comparatively few deallocations that happen (few hundreds or few >>> > thousand). If deallocate is hot, we are using metaspace wrong. >>> >>> MethodData does a lot of deallocations from metaspace because it's >>> allocated racily. It might be using Metaspace wrong. >> >> I think that should be okay. This should still be an exception. I have never >> seen that many deallocations happening in customer cases. > >> @tstuefe Do you have more comments on this PR? > > Sorry, I was swamped the past days. I'll take a look tomorrow. AFAIK, @tstuefe (currently on vacation) has a working prototype of a Klass-lookup-table with good performance and reasonable ‘management cost’. This would make make many things much simpler and also help solve this problem because it makes irrelevant where a Klass lives. Roman ------------- PR Comment: https://git.openjdk.org/jdk/pull/19157#issuecomment-2401435370
