Github user davies commented on a diff in the pull request:
https://github.com/apache/spark/pull/13318#discussion_r65753944
--- Diff:
core/src/main/java/org/apache/spark/unsafe/map/BytesToBytesMap.java ---
@@ -221,7 +221,8 @@ public BytesToBytesMap(
SparkEnv.get() != null ? SparkEnv.get().blockManager() : null,
SparkEnv.get() != null ? SparkEnv.get().serializerManager() : null,
initialCapacity,
- 0.70,
+ // In order to re-use the longArray for sorting, the load factor
cannot be larger than 0.5.
+ 0.5,
--- End diff --
As analized in the comment, this only have about 10% (or less) difference
in practice, I'd like not to have this complexity.
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