msfroh commented on code in PR #14511:
URL: https://github.com/apache/lucene/pull/14511#discussion_r2047793102


##########
lucene/core/src/java/org/apache/lucene/codecs/lucene103/Lucene103PostingsReader.java:
##########
@@ -1310,7 +1317,7 @@ public List<Impact> getImpacts(int level) {
                 return readImpacts(level1SerializedImpacts, level1Impacts);
               }
             }
-            return DUMMY_IMPACTS;
+            return NON_COMPETITIVE_IMPACTS;

Review Comment:
   This was the only reference to `DUMMY_IMPACTS`, right? Can we remove it?



##########
lucene/core/src/java/org/apache/lucene/codecs/lucene103/Lucene103PostingsReader.java:
##########
@@ -282,6 +288,10 @@ public PostingsEnum postings(
   @Override
   public ImpactsEnum impacts(FieldInfo fieldInfo, BlockTermState state, int 
flags)
       throws IOException {
+    if (state.docFreq <= BLOCK_SIZE) {
+      // no skip data
+      return new SlowImpactsEnum(postings(fieldInfo, state, null, flags));
+    }

Review Comment:
   This is essentially taking the place of `DUMMY_IMPACTS`, right? 
   
   It's the thing that kicks in on tail blocks, which is what `DUMMY_IMPACTS` 
was there for. (I'm trying to make sure I understand the change.)



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