msfroh commented on code in PR #12995:
URL: https://github.com/apache/lucene/pull/12995#discussion_r1454324230
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lucene/facet/src/java/org/apache/lucene/facet/taxonomy/directory/TaxonomyIndexArrays.java:
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@@ -68,25 +90,49 @@ public TaxonomyIndexArrays(IndexReader reader,
TaxonomyIndexArrays copyFrom) thr
// it may be caused if e.g. the taxonomy segments were merged, and so an
updated
// NRT reader was obtained, even though nothing was changed. this is not
very likely
// to happen.
- int[] copyParents = copyFrom.parents();
- this.parents = new int[reader.maxDoc()];
- System.arraycopy(copyParents, 0, parents, 0, copyParents.length);
- initParents(reader, copyParents.length);
-
+ int[][] parentArray = allocateChunkedArray(reader.maxDoc());
+ copyChunkedArray(copyFrom.parents.values, parentArray);
+ initParents(parentArray, reader, copyFrom.parents.length());
+ parents = new ChunkedArray(parentArray);
if (copyFrom.initializedChildren) {
initChildrenSiblings(copyFrom);
}
}
+ private static int[][] allocateChunkedArray(int size) {
+ int chunkCount = size / CHUNK_SIZE + 1;
Review Comment:
Got it!
I handled the multiple of `CHUNK_SIZE` case without allocating an empty
array. I also added a unit test that specifically flexes ChunkedIntArray.
(And I cleaned up a few more cases where I was still dividing/moduloing
instead of bit-shifting and masking.)
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