                         [](int index){ return std::rand(); },
                         bit_setter);
 }
+
+#ifdef ENABLE_CONCAT_BENCHMARK
+TEST_F(ColumnConcatTest, Benchmark) {   
+   
+  size_t n = 42000000;
+  std::vector<size_t> column_sizes{n, n, n, n};
+
+  gdf_size_type null_interval = 17;
+
+  auto bit_setter = [null_interval](gdf_size_type row, gdf_size_type col) { 
+    return (row % null_interval) != 0; 
+  };
+
+  multicolumn_bench<int>(column_sizes, 
+                        [](int index){ return std::rand(); },
+                        bit_setter);
+}
+#endif // ENABLE_CONCAT_BENCHMARK

    //print_valid_data(ref_valid.data(), total_size); printf("\n");
    //print_valid_data(output_gdf_col->valid, total_size);
  }
};

// Test various cases with null pointers or empty columns

#include <cstdlib>
#include <iostream>
#include <vector>
#include <chrono>

#include <thrust/device_vector.h>

