Count number of bits to create a better estimate of number of hits it will produce.

1 files changed, 2 insertions, 1 deletions

diff --git a/searchcore/src/vespa/searchcore/proton/documentmetastore/lid_allocator.cpp b/searchcore/src/vespa/searchcore/proton/documentmetastore/lid_allocator.cpp
index 57f8be576db..84fe39c56b6 100644
--- a/searchcore/src/vespa/searchcore/proton/documentmetastore/lid_allocator.cpp
+++ b/searchcore/src/vespa/searchcore/proton/documentmetastore/lid_allocator.cpp
@@ -198,7 +198,8 @@ public:
           _activeLids(activeLids),
           _matchDataVector()
     {
-        setEstimate(HitEstimate(_activeLids.size(), false));
+        size_t numHits = _activeLids.countTrueBits();
+        setEstimate(HitEstimate(numHits, (numHits == 0)));
     }
 
     bool isWhiteList() const override { return true; }