From e71569b15ec3385212fcbb5b6ec6fc8dea6c0386 Mon Sep 17 00:00:00 2001
From: froejdh_e <erik.frojdh@psi.ch>
Date: Fri, 11 Apr 2025 13:38:33 +0200
Subject: [PATCH] resize before read

---
 include/aare/ClusterFile.hpp   | 3 ++-
 include/aare/ClusterVector.hpp | 2 +-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/include/aare/ClusterFile.hpp b/include/aare/ClusterFile.hpp
index 7248dc2..f58d2d6 100644
--- a/include/aare/ClusterFile.hpp
+++ b/include/aare/ClusterFile.hpp
@@ -229,6 +229,7 @@ ClusterFile<ClusterType, Enable>::read_clusters_without_cut(size_t n_clusters) {
     }
 
     ClusterVector<ClusterType> clusters(n_clusters);
+    clusters.resize(n_clusters);
 
     int32_t iframe = 0; // frame number needs to be 4 bytes!
     size_t nph_read = 0;
@@ -283,7 +284,7 @@ template <typename ClusterType, typename Enable>
 ClusterVector<ClusterType>
 ClusterFile<ClusterType, Enable>::read_clusters_with_cut(size_t n_clusters) {
     ClusterVector<ClusterType> clusters;
-    clusters.reserve(n_clusters);
+    clusters.resize(n_clusters);
 
     // if there are photons left from previous frame read them first
     if (m_num_left) {
diff --git a/include/aare/ClusterVector.hpp b/include/aare/ClusterVector.hpp
index eae2118..13ec882 100644
--- a/include/aare/ClusterVector.hpp
+++ b/include/aare/ClusterVector.hpp
@@ -299,7 +299,7 @@ class ClusterVector<Cluster<T, ClusterSizeX, ClusterSizeY, CoordType>> {
      */
     ClusterVector(size_t capacity = 1024, uint64_t frame_number = 0)
         : m_frame_number(frame_number) {
-        m_data.resize(capacity);
+        m_data.reserve(capacity);
     }
 
     // Move constructor