Use ConcurrentHashMap for JVM target
#39
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#38 attempts to use AndroidX Collection KMP on JVM and iOS (and a few others) for the thread-safe mutable map implementation to address JVM performance issue with Stately.
However both our basic
JvmConcurrencyTestand lincheck surfacedConcurrentModificationExceptionin AndroidX Collection'sSimpleArrayMap.This PR instead use
ConcurrentHashMapfor JVM, and Stately for all other targets.Our
JvmConturrencyTestis passing but Lincheck's Model checking test still surfaces some linearizability issues with ourRealCacheimplementation, though it's not a regression. #47