LUCENE-8980: Blocktree seekExact now checks min-max range of the segment

lucene/CHANGES.txt

@@ -160,6 +160,9 @@ the total hits is not requested.
 * LUCENE-8939: Introduce shared count based early termination across multiple slices
   (Atri Sharma)
 
+* LUCENE-8980: Blocktree's seekExact now short-circuits false if the term isn't in the min-max range of the segment.
+  Large perf gain for ID/time like data when populated sequentially.  (Guoqiang Jiang)
+
 Bug Fixes
 
 * LUCENE-8755: spatial-extras quad and packed quad prefix trees could throw a

lucene/core/src/java/org/apache/lucene/codecs/blocktree/SegmentTermsEnum.java

@@ -321,6 +321,10 @@ final class SegmentTermsEnum extends BaseTermsEnum {
       throw new IllegalStateException("terms index was not loaded");
     }
 
+    if (fr.size() > 0 && (target.compareTo(fr.getMin()) < 0 || target.compareTo(fr.getMax()) > 0)) {
+        return false;
+    }
+
     term.grow(1 + target.length);
 
     assert clearEOF();