Beam: exhaustive scan of sdks/java/core + runners — all membership tests already
use proper Set types (HashSet, LinkedHashSet, ImmutableSet, TreeSet). CLEAN.
Hive hive-0001: SharedWorkOptimizer.mergeSchema() uses List.contains() in loops
for neededColumnIDs/neededColumns/virtualCols dedup. O(D*R) per list. MEDIUM, 3-4x.
Hive hive-0002: HiveRelMdSize.averageColumnSizes() uses ImmutableList.contains(i)
in column loop during Calcite metadata queries. O(C*L). MEDIUM, 3-5x.
Both patched with HashSet wrappers. 2/2 unit tests PASS.
Authors: russell@unturf.com · brackishbert@gmail.com · foxhop.net · TimeHexOn.com
Patches, unit tests, benchmarks, whitepaper, and outreach briefs.
Public domain — no copyright claimed. Use freely.
