JDK-8165372 : StackWalker performance regression following JDK-8147039
  • Type: Bug
  • Component: core-libs
  • Sub-Component: java.lang
  • Affected Version: 9
  • Priority: P3
  • Status: Closed
  • Resolution: Fixed
  • Submitted: 2016-09-02
  • Updated: 2016-10-14
  • Resolved: 2016-09-20
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JDK 9
9 b140Fixed
Related Reports
Relates :  
JDK-8147039 - Incorrect locals and operands in compiled frames
Relates :  
JDK-8166501 - compilation error in stackwalk.cpp on some gccs
Description
There was an across-the-board StackWalker performance regression of 25-60% introduced by the fix for JDK-8147039 (Incorrect locals and operands in compiled frames)
Comments
noreg-perf: existing tests under jdk/test/java/lang/StackWalker/ can be used to confirm that nothing is broken.
14-09-2016
The main code change in JDK-8147039 was changing stackwalk.cpp to walk the stack using javaVFrame, rather than vframeStream. Presumably vframeStream is able to do it faster.
02-09-2016