> This PR outlines a solution for making immutable maps `@ValueBased` by > removing cacheing of certain values in `AbstractMap`. > > By removing these caching fields in `AbstractMap`, we can make the immutable > maps `@ValueBased` and at the same time, performance is likely improved > because the JVM is probably able to optimize away object creation anyway via > escape analysis. Also, all maps will occupy less space as we get rid of a > number of objects and references stored for each map. > > We need to benchmark this solution to better understand its implications.
Per Minborg has updated the pull request incrementally with one additional commit since the last revision: Remove redundant impl spec parts ------------- Changes: - all: https://git.openjdk.org/jdk/pull/15614/files - new: https://git.openjdk.org/jdk/pull/15614/files/f0410ee3..2cb090b6 Webrevs: - full: https://webrevs.openjdk.org/?repo=jdk&pr=15614&range=01 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=15614&range=00-01 Stats: 8 lines in 1 file changed: 0 ins; 8 del; 0 mod Patch: https://git.openjdk.org/jdk/pull/15614.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/15614/head:pull/15614 PR: https://git.openjdk.org/jdk/pull/15614
