Utilize docIdRunEnd on ReqExclBulkScorer (#14806)

Author: HUSTERGS

lucene/CHANGES.txt

@@ -214,6 +214,8 @@ Optimizations
 
 * GITHUB#14896: Vectorize filterCompetitiveHits (Ge Song, Adrien Grand)
 
+* GITHUB#14806: Utilize docIdRunEnd on ReqExclBulkScorer. (Ge Song)
+
 Changes in Runtime Behavior
 ---------------------
 * GITHUB#14823: Decrease TieredMergePolicy's default number of segments per

lucene/core/src/java/org/apache/lucene/search/ReqExclBulkScorer.java

@@ -57,7 +57,10 @@ public int score(LeafCollector collector, Bits acceptDocs, int min, int max) thr
         exclDoc = exclApproximation.advance(upTo);
       }
       if (exclDoc == upTo) {
-        if (exclTwoPhase == null || exclTwoPhase.matches()) {
+        if (exclTwoPhase == null) {
+          // from upTo to docIdRunEnd() are excluded, so we scored up to docIdRunEnd()
+          upTo = exclApproximation.docIDRunEnd();
+        } else if (exclTwoPhase.matches()) {
           // upTo is excluded so we can consider that we scored up to upTo+1
           upTo += 1;
         }