jfjoch_writer: Reserve all metadata vectors when opening file

writer/HDF5DataFilePluginReflection.cpp

@@ -5,10 +5,9 @@
 #include "../include/spdlog/fmt/fmt.h"
 #include "../common/Reflection.h"
 
-void HDF5DataFilePluginReflection::OpenFile(HDF5File &data_file, const DataMessage &msg) {
+void HDF5DataFilePluginReflection::OpenFile(HDF5File &data_file, const DataMessage &msg, size_t images_per_file) {
     reflection_group = std::make_unique<HDF5Group>(data_file, "/entry/reflections");
     reflection_group->NXClass("NXcollection");
-
 }
 
 void HDF5DataFilePluginReflection::Write(const DataMessage &msg, uint64_t image_number) {
@@ -19,6 +18,21 @@ void HDF5DataFilePluginReflection::Write(const DataMessage &msg, uint64_t image_
     std::vector<float> I, sigma, d, lp;
     std::vector<float> image, phi, pred_x, pred_y, bkg, partiality, zeta;
 
+    h.reserve(msg.reflections.size());
+    k.reserve(msg.reflections.size());
+    l.reserve(msg.reflections.size());
+    I.reserve(msg.reflections.size());
+    sigma.reserve(msg.reflections.size());
+    d.reserve(msg.reflections.size());
+    pred_x.reserve(msg.reflections.size());
+    pred_y.reserve(msg.reflections.size());
+    bkg.reserve(msg.reflections.size());
+    lp.reserve(msg.reflections.size());
+    partiality.reserve(msg.reflections.size());
+    image.reserve(msg.reflections.size());
+    phi.reserve(msg.reflections.size());
+    zeta.reserve(msg.reflections.size());
+
     for (const auto &refl : msg.reflections) {
         image.emplace_back(refl.image_number);
         h.emplace_back(refl.h);