gsmiller commented on code in PR #12194:
URL: https://github.com/apache/lucene/pull/12194#discussion_r1131775078
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lucene/core/src/java/org/apache/lucene/codecs/lucene90/Lucene90PostingsReader.java:
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@@ -479,6 +481,31 @@ private void refillDocs() throws IOException {
assert docBuffer[BLOCK_SIZE] == NO_MORE_DOCS;
}
+ @Override
+ public int peekNextNonMatchingDocID() throws IOException {
Review Comment:
This won't be straight forward, but we have a "special" encoding whenever a
block is "completely dense" (i.e., has a run of 128 consecutive docs). See
`PForUtil#decodeAndPrefixSum` for details. I wonder if we can leverage that
here? In extreme cases, we may have multiple blocks that are all consecutive.
Could we "peek ahead" and discover that?
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