diff --git a/internal/storage/sqlite/sqlite_bench_test.go b/internal/storage/sqlite/sqlite_bench_test.go
index b1f1fc57..752330e0 100644
--- a/internal/storage/sqlite/sqlite_bench_test.go
+++ b/internal/storage/sqlite/sqlite_bench_test.go
@@ -236,6 +236,39 @@ func BenchmarkSyncMerge(b *testing.B) {
 	}
 }
 
+// BenchmarkRebuildBlockedCache_Large benchmarks cache rebuild in isolation on 10K database
+// This measures the core operation that bd-zw72 is investigating for incremental optimization
+func BenchmarkRebuildBlockedCache_Large(b *testing.B) {
+	store, cleanup := setupLargeBenchDB(b)
+	defer cleanup()
+	ctx := context.Background()
+
+	b.ResetTimer()
+	b.ReportAllocs()
+
+	for i := 0; i < b.N; i++ {
+		if err := store.rebuildBlockedCache(ctx, nil); err != nil {
+			b.Fatalf("rebuildBlockedCache failed: %v", err)
+		}
+	}
+}
+
+// BenchmarkRebuildBlockedCache_XLarge benchmarks cache rebuild in isolation on 20K database
+func BenchmarkRebuildBlockedCache_XLarge(b *testing.B) {
+	store, cleanup := setupXLargeBenchDB(b)
+	defer cleanup()
+	ctx := context.Background()
+
+	b.ResetTimer()
+	b.ReportAllocs()
+
+	for i := 0; i < b.N; i++ {
+		if err := store.rebuildBlockedCache(ctx, nil); err != nil {
+			b.Fatalf("rebuildBlockedCache failed: %v", err)
+		}
+	}
+}
+
 // Helper function
 func intPtr(i int) *int {
 	return &i