On Tue, 27 Oct 2026 18:24:11 GMT, Aleksey Shipilev <[email protected]> wrote:

> The uncommon trap count regression seems to be gone!
> 
> I can see one config where first iterations are considerably faster when I 
> set a giant PCR, but the steady state is still slower to achieve.

I think I'd expect that: the counters are updated so rarely that the compilers 
are starved of information. I don't think there has to be any more explanation 
for it.

> BTW, this fails right away with ` -XX:+AggressiveProfileReduction`:

Fixed. I removed one "optimization" that seems to confuse the C1 register 
allocator but doesn't help much.

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PR Comment: https://git.openjdk.org/jdk/pull/28541#issuecomment-6503363604

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