separate seqlock fine grain into separate index

bindings/cpp/include/svs/runtime/vamana_index.h

@@ -54,8 +54,11 @@ struct MemoryBreakdown {
     size_t graph_bytes = 0;
     size_t data_bytes = 0;
     size_t metadata_bytes = 0;
+    size_t reverse_edges_bytes = 0;
 
-    size_t total() const { return graph_bytes + data_bytes + metadata_bytes; }
+    size_t total() const {
+        return graph_bytes + data_bytes + metadata_bytes + reverse_edges_bytes;
+    }
 };
 
 // Abstract interface for Vamana-based indices.

bindings/cpp/src/vamana_index_impl.h

@@ -88,6 +88,7 @@ class VamanaIndexImpl {
         out.graph_bytes = breakdown.graph_bytes;
         out.data_bytes = breakdown.data_bytes;
         out.metadata_bytes = breakdown.metadata_bytes;
+        out.reverse_edges_bytes = breakdown.reverse_edges_bytes;
     }
 
     size_t dimensions() const { return dim_; }

bindings/python/src/vamana_common.cpp

@@ -145,7 +145,7 @@ prefetching during search.
         .def(
             py::init<svs::index::vamana::SearchBufferConfig, bool, size_t, size_t>(),
             py::arg("buffer_config") = svs::index::vamana::SearchBufferConfig(),
-            py::arg("search_buffer_visited_set") = false,
+            py::arg("search_buffer_visited_set") = true,
             py::arg("prefetch_lookahead") = 4,
             py::arg("prefetch_step") = 1
         )

bindings/python/tests/test_vamana_common.py

@@ -45,7 +45,7 @@ def test_vamana_search_parameters(self):
         # Default definitions.
         x = svs.VamanaSearchParameters()
         self.assertEqual(x.buffer_config, svs.SearchBufferConfig())
-        self.assertEqual(x.search_buffer_visited_set, False)
+        self.assertEqual(x.search_buffer_visited_set, True)
         self.assertEqual(x, svs.VamanaSearchParameters())
 
         x.buffer_config = svs.SearchBufferConfig(20)
@@ -57,7 +57,7 @@ def test_vamana_search_parameters(self):
 
         x = svs.VamanaSearchParameters(svs.SearchBufferConfig(10, 20))
         self.assertEqual(x.buffer_config, svs.SearchBufferConfig(10, 20))
-        self.assertEqual(x.search_buffer_visited_set, False)
+        self.assertEqual(x.search_buffer_visited_set, True)
         self.assertNotEqual(x, svs.VamanaSearchParameters())
         self.assertEqual(x, svs.VamanaSearchParameters(svs.SearchBufferConfig(10, 20)))