On Tue, 23 Jul 2024 19:14:57 GMT, Vladimir Ivanov <vliva...@openjdk.org> wrote:
> > Also also, Klass::is_subtype_of() is used for C1 runtime. > > Can you elaborate, please? Sorry, that was rather vague. In C1-compiled code, the Java method `Class::isInstance(Object)`calls `Klass::is_subtype_of()`. In general, I find it difficult to decide how much work, if any, should be done to improve C1 performance. Clearly, if C1 exists only to help with startup time in a tiered compilation system, the answer is "not much". ------------- PR Review Comment: https://git.openjdk.org/jdk/pull/19989#discussion_r1689414385
