The ICC_ColorSpace class uses a couple of internal data caches that might be used w/o any synchronization by different threads.
The solution is to wrap the initialization of the cached data by the DLC. I have checked performance impact by the J2DBench and it seems no big difference before/after the fix. BTW jdk16 in some cases x10 times faster than 8u and 11u. Probably we should backport something, will check that. ------------- Commit messages: - Update ICC_ColorSpace.java - Update MTICC_ColorSpaceToFrom.java - Update ICC_ColorSpace.java - Initial fix Changes: https://git.openjdk.java.net/jdk/pull/1069/files Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=1069&range=00 Issue: https://bugs.openjdk.java.net/browse/JDK-8255575 Stats: 182 lines in 2 files changed: 114 ins; 4 del; 64 mod Patch: https://git.openjdk.java.net/jdk/pull/1069.diff Fetch: git fetch https://git.openjdk.java.net/jdk pull/1069/head:pull/1069 PR: https://git.openjdk.java.net/jdk/pull/1069
