With the introduction of JDK-8328181... Crypto-AESGCMBench.encrypt is showing a regression that holds into later builds (graph attached):

-2.3% Crypto-AESGCMBench.encrypt on macOS-x64

It appears it may also impact the benchmark on Windows-x64 -- though the statistical measurements are less clear.

The regression also appears in the nightly measurements (graph attached).

The regression was isolated to CI build jdk-23+18-1427 (which only contains JDK-8328181) - (graph attached).

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Added 5/21/2024:
Just isolated more benchmark regressions to the introduction of JDK-8328181...

-6% Renaissance-Mnemonics on macOS-x64
-5% Renaissance-Scrabble on macOS-x64

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Added 5/22/2024:
Just isolated more benchmark regressions to the introduction of JDK-8328181...

-3% to -4% SPECjvm2008-Derby-* on macOS-x64
-1% to -2% SPECjvm2008-XML.transform-* on macOS-x64