diff --git a/core/src/point_cloud.cpp b/core/src/point_cloud.cpp
index f9f4284f..57d14eac 100644
--- a/core/src/point_cloud.cpp
+++ b/core/src/point_cloud.cpp
@@ -149,9 +149,9 @@ bool PointCloud::load_pc(const std::string& input_file_name, bool load_cache_mod
     this->intensities.clear();
     this->timestamps.clear();
 
-    this->points_local.resize(npoints);
-    this->intensities.resize(npoints);
-    this->timestamps.resize(npoints);
+    this->points_local.reserve(npoints);
+    this->intensities.reserve(npoints);
+    this->timestamps.reserve(npoints);
 
     while (p_count < npoints)
     {
diff --git a/core/src/point_clouds.cpp b/core/src/point_clouds.cpp
index eac47cb8..056958b4 100644
--- a/core/src/point_clouds.cpp
+++ b/core/src/point_clouds.cpp
@@ -1317,6 +1317,11 @@ bool PointClouds::load_whu_tls(
                 point_clouds[i].points_local[j] -= this->offset;
     }
 
+    size_t total_points = 0;
+    for (int i = 0; i < point_clouds.size(); i++)
+        total_points += point_clouds[i].points_local.size();
+    std::cout << "total points loaded: " << total_points << std::endl;
+
     print_point_cloud_dimension();
     const auto end = std::chrono::system_clock::now();
     std::chrono::duration<double> elapsed_seconds = end - start;