Refactor for loop at PointRangeQuery hot path (#14991)

Co-authored-by: gesong.samuel <[email protected]>

Author: HUSTERGS

lucene/CHANGES.txt

@@ -220,6 +220,8 @@ Optimizations
 
 * GITHUB#14970: Further speed up filtering hits by score. (Adrien Grand)
 
+* GITHUB#14991: Refactor for loop at PointRangeQuery hot path. (Ge Song)
+
 Changes in Runtime Behavior
 ---------------------
 * GITHUB#14823: Decrease TieredMergePolicy's default number of segments per

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

@@ -210,7 +210,7 @@ public void visit(DocIdSetIterator iterator) throws IOException {
 
           @Override
           public void visit(IntsRef ref) {
-            for (int i = ref.offset; i < ref.offset + ref.length; i++) {
+            for (int i = ref.offset, to = ref.offset + ref.length; i < to; i++) {
               result.set(ref.ints[i]);
             }
             cost[0] += ref.length;

lucene/core/src/java/org/apache/lucene/util/DocIdSetBuilder.java

@@ -60,8 +60,8 @@ public void add(int doc) {
 
     @Override
     public void add(IntsRef docs) {
-      for (int i = 0; i < docs.length; i++) {
-        bitSet.set(docs.ints[docs.offset + i]);
+      for (int i = docs.offset, to = docs.offset + docs.length; i < to; i++) {
+        bitSet.set(docs.ints[i]);
       }
     }