Add lru-cache module: LinkedHashMap and hand-rolled DLL LRU, coarse-lock/striped thread-safe variants, broken ReadWriteLock demo, Caffeine reference, 43 tests, JMH harness

Co-Authored-By: Claude Sonnet 5.5 <[email protected]> Claude-Session: https://claude.ai/code/session_017ic4b4VQVEJWetTT1dYzyJ
2026-10-29 05:52:27 +00:00
parent 4a376b94e9
commit 0457cf4bfb
31 changed files with 1425 additions and 0 deletions
@@ -0,0 +1,7 @@
+StripedLruCache(capacity 4, 2 stripes): even keys -> stripe 0, odd keys -> stripe 1
+===================================================================================
+
+put(1) put(0) put(2) put(4)     // key 1 is the globally least recently used
+get(0) -> null   (evicted: stripe 0 held {0,2} and was full)
+get(1) -> present (a strict global LRU would have evicted it instead)
+size() = 3 of capacity 4  (evicted while not full)