alex-plekhanov commented on code in PR #11984:
URL: https://github.com/apache/ignite/pull/11984#discussion_r2032806500
##########
modules/core/src/main/java/org/apache/ignite/internal/processors/cache/persistence/GridCacheOffheapManager.java:
##########
@@ -1110,7 +1113,14 @@ private Metas getOrAllocateCacheMetas() throws
IgniteCheckedException {
int cleared = 0;
// Use random shift to reduce contention.
- int shift =
ThreadLocalRandom.current().nextInt(F.size(cacheDataStores().iterator()));
Review Comment:
Currently we create 3 `cacheDataStores()` iterators (in worst case). Your
patch reduces it to 2 iterators. But we can use also reduce it to 1 iterator.
We can introduce something like `randomShiftedLocalPartitionsIterator()` where
locParts.length() - not requres any computations and we can calculate shift
based on this array length. After it both following loops over
`cacheDataStores()` can be combined to one.
##########
modules/core/src/main/java/org/apache/ignite/internal/processors/cache/persistence/checkpoint/CheckpointWorkflow.java:
##########
@@ -379,7 +379,7 @@ private void fillCacheGroupState(CheckpointRecord cpRec)
throws IgniteCheckedExc
continue;
Runnable r = () -> {
- ArrayList<GridDhtLocalPartition> parts = new
ArrayList<>(grp.topology().localPartitions().size());
+ ArrayList<GridDhtLocalPartition> parts = new
ArrayList<>(grp.topology().localPartitionsNumber());
for (GridDhtLocalPartition part :
grp.topology().currentLocalPartitions())
parts.add(part);
Review Comment:
Looks like just `localPartitions()` can be used instead of
`currentLocalPartitions()`
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