JDK-8321581 : JFR: Remove remaining use of instrumentation for I/O events
  • Type: Enhancement
  • Component: hotspot
  • Sub-Component: jfr
  • Priority: P2
  • Status: Closed
  • Resolution: Duplicate
  • Submitted: 2023-12-08
  • Updated: 2024-08-04
  • Resolved: 2024-06-01
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JDK 23
23Resolved
Related Reports
Duplicate :  
JDK-8319551 - Regressions >10% in some JFR Startups
Duplicate :  
JDK-8284305 - JFR: Use RemappingMethodAdapter instead of MethodRemapper
Description
Some I/O events still rely on bytecode instrumentation of I/O related classes. It should be removed, so all use of ASM can be pulled out from JFR.

Fixing this important to avoid the 10% regression on startup introduced in JDK 22. See JDK-8319551