JDK-8368245 : Copying of native memory segments is slower for certain sizes after
  • Type: Bug
  • Component: hotspot
  • Sub-Component: compiler
  • Affected Version: 26
  • Priority: P4
  • Status: Open
  • Resolution: Unresolved
  • Submitted: 2025-09-22
  • Updated: 2025-09-22
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JDK 26
26Unresolved
Description
Copying of most workloads is now faster in JDK 26 compared to JDK 25. 

However, copying of memory segments is slower for certain sizes (e.g., 64) and is now a bit slower than in JDK 25.
Comments
ILW = Slower copying of memory segments, only certain sizes, no workaround? = MLH = P4
22-09-2025