jpountz commented on a change in pull request #264:
URL: https://github.com/apache/lucene/pull/264#discussion_r696569831
##########
File path: lucene/facet/src/java/org/apache/lucene/facet/FacetsConfig.java
##########
@@ -410,7 +411,16 @@ private void processFacetFields(
// Facet counts:
// DocValues are considered stored fields:
- doc.add(new BinaryDocValuesField(indexFieldName,
dedupAndEncode(ordinals.get())));
+ IntsRef o = ordinals.get();
+ Arrays.sort(o.ints, o.offset, o.length);
Review comment:
The last parameter of Arrays#sort is the end index, not the length.
```suggestion
Arrays.sort(o.ints, o.offset, o.offset+o.length);
```
##########
File path:
lucene/facet/src/java/org/apache/lucene/facet/taxonomy/DocValuesOrdinalsReader.java
##########
@@ -59,16 +53,21 @@ public void get(int docID, IntsRef ordinals) throws
IOException {
"docs out of order: lastDocID=" + lastDocID + " vs docID=" +
docID);
}
lastDocID = docID;
- if (docID > values.docID()) {
- values.advance(docID);
- }
- final BytesRef bytes;
- if (values.docID() == docID) {
- bytes = values.binaryValue();
- } else {
- bytes = new BytesRef(BytesRef.EMPTY_BYTES);
+
+ ordinals.offset = 0;
+ ordinals.length = 0;
+
+ if (dv.advanceExact(docID)) {
Review comment:
this change probably contributes to the speedup, we had seen
non-negligible speedups when moving from advance to advanceExact
##########
File path:
lucene/facet/src/java/org/apache/lucene/facet/taxonomy/DocValuesOrdinalsReader.java
##########
@@ -41,12 +40,7 @@ public DocValuesOrdinalsReader(String field) {
@Override
public OrdinalsSegmentReader getReader(LeafReaderContext context) throws
IOException {
Review comment:
Do we actually need the OrdinalsSegmentReader or could we use
`SortedNumericDocValues` instead? Both seem to be about fetching some sorted
integers for a given doc ID. This might help get some more performance as we
would no longer have to copy these ints into an IntsRef.
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