Vladimir Ozerov created IGNITE-2584:
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Summary: Investigate whether
GridDhtPartitionTopologyImpl.part2Node could have List as value.
Key: IGNITE-2584
URL: https://issues.apache.org/jira/browse/IGNITE-2584
Project: Ignite
Issue Type: Sub-task
Components: cache
Affects Versions: 1.5.0.final
Reporter: Vladimir Ozerov
Fix For: 1.6
*Problem*
"GridDhtPartitionTopologyImpl.part2Node" has value of type Set<UUID>. However,
set semantics is almost never used except of node leave events which are pretty
rate.
Iterations over this Set require instantiation of iterators. This could be
avoided if we replace HashSet with ArrayList.
*Proposed solution*
1) Investigate whether Set "unique" semantics is exploited anywhere.
2) Investigate whether HashSet.get() O(1) is exploited on hot paths.
3) If neither p.1 nor p.2 hold - replace HashSet with ArrayList and change
corresponding foreach-loops to counted for-loops.
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