neoremind commented on a change in pull request #91:
URL: https://github.com/apache/lucene/pull/91#discussion_r629484180
##########
File path:
lucene/core/src/java/org/apache/lucene/util/bkd/MutablePointsReaderUtils.java
##########
@@ -35,63 +37,60 @@
MutablePointsReaderUtils() {}
- /** Sort the given {@link MutablePointValues} based on its packed value then
doc ID. */
+ /**
+ * Sort the given {@link MutablePointValues} based on its packed value, note
that doc ID is not
+ * taken into sorting algorithm, since if they are already in ascending
order, stable sort is able
+ * to maintain the ordering of doc ID.
+ */
Review comment:
I will take a deeper look at the sortMap, and try to deliver the
modification later.
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