JDK-8269040 : Regression ~1.7% in DaCapo-pmd-large after JDK-8264774
  • Type: Bug
  • Component: core-libs
  • Affected Version: 17
  • Priority: P4
  • Status: Closed
  • Resolution: Incomplete
  • Submitted: 2021-06-18
  • Updated: 2021-12-07
  • Resolved: 2021-12-07
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Related Reports
Relates :  
JDK-8264774 - Implementation of Foreign Function and Memory API (Incubator)
Description
Observed on Mac and Linux.
Comments
Later changes recovered the performance.
07-12-2021
Very odd, given that most of the machinery (if not all) introduced by this patch involves the use of an incubating API, so I doubt that the benchmark is using any of it. The only exception I can think of are the changes to support async IO operations on byte buffers backed by segments - but I don't know off-hand if that might have the impact described here.
21-06-2021
Only two instances of ByteBuffer in two tests in the source code repo for the PMD tool: https://github.com/pmd/pmd/search?q=ByteBuffer In other words, this benchmark is not byte buffer heavy, at least not directly so.
21-06-2021