diff --git a/common/StatusVector.cpp b/common/StatusVector.cpp
index b8765ca9..f5ddb3ab 100644
--- a/common/StatusVector.cpp
+++ b/common/StatusVector.cpp
@@ -4,9 +4,11 @@
 
 #include "StatusVector.h"
 
-void StatusVector::Clear() {
+void StatusVector::Clear(size_t reserve) {
     std::unique_lock ul(m);
     content.clear();
+    if (reserve > 0)
+        content.reserve(reserve);
 
     mean = NAN;
     count = 0;
@@ -187,15 +189,19 @@ MultiLinePlot StatusVector::GetMaxPlot(int64_t bin_size, float x_start, float x_
     return ret;
 }
 
-void StatusMultiVector::Clear() {
+void StatusMultiVector::Clear(size_t reserve) {
     std::unique_lock ul(m);
+    if (reserve > 0)
+        r = reserve;
     status.clear();
 }
 
 void StatusMultiVector::AddElement(const std::string &s, uint32_t id, float val) {
     std::unique_lock ul(m);
-    if (!status.contains(s))
+    if (!status.contains(s)) {
         status[s] = std::make_unique<StatusVector>();
+        status[s]->Clear(r);
+    }
     status[s]->AddElement(id, val);
 }
 
diff --git a/common/StatusVector.h b/common/StatusVector.h
index 2326223f..65ea4956 100644
--- a/common/StatusVector.h
+++ b/common/StatusVector.h
@@ -22,7 +22,7 @@ class StatusVector {
     size_t count = 0;
     double sum = 0;
 public:
-    void Clear();
+    void Clear(size_t reserve = 0);
     void AddElement(uint32_t id, std::optional<float> val);
     void AddElement(uint32_t id, float val);
     std::optional<float> GetElement(uint32_t id) const;
@@ -44,8 +44,9 @@ public:
 class StatusMultiVector {
     std::mutex m;
     std::map<std::string, std::unique_ptr<StatusVector>> status;
+    size_t r = 0;
 public:
-    void Clear();
+    void Clear(size_t reserve = 0);
     void AddElement(const std::string& s, uint32_t id, float val);
     void AddElement(const std::string& s, uint32_t id, std::optional<float> val);
 
diff --git a/receiver/JFJochReceiverPlots.cpp b/receiver/JFJochReceiverPlots.cpp
index aada4c8d..9581db1f 100644
--- a/receiver/JFJochReceiverPlots.cpp
+++ b/receiver/JFJochReceiverPlots.cpp
@@ -13,41 +13,46 @@ void JFJochReceiverPlots::Setup(const DiffractionExperiment &experiment, const A
     grid_scan = experiment.GetGridScan();
     default_binning = experiment.GetDefaultPlotBinning();
 
+    size_t r = experiment.GetImageNum();
     // Reset all status vectors
     xfel_pulse_id.Clear();
+    if (experiment.IsPulsedSource()) {
+        xfel_pulse_id.reserve(r);
+        xfel_event_code.reserve(r);
+    }
     xfel_event_code.Clear();
-    bkg_estimate.Clear();
-    spot_count.Clear();
-    spot_count_low_res.Clear();
-    spot_count_indexed.Clear();
-    spot_count_ice.Clear();
+    bkg_estimate.Clear(r);
+    spot_count.Clear(r);
+    spot_count_low_res.Clear(r);
+    spot_count_indexed.Clear(r);
+    spot_count_ice.Clear(r);
 
-    indexing_solution.Clear();
-    indexing_unit_cell_angle.Clear();
-    indexing_unit_cell_len.Clear();
-    error_pixels.Clear();
-    saturated_pixels.Clear();
-    strong_pixels.Clear();
-    receiver_delay.Clear();
-    receiver_free_send_buf.Clear();
-    image_collection_efficiency.Clear();
-    roi_sum.Clear();
-    roi_max_count.Clear();
-    roi_pixels.Clear();
-    roi_x.Clear();
-    roi_y.Clear();
-    roi_mean.Clear();
-    packets_received.Clear();
-    max_value.Clear();
-    resolution_estimate.Clear();
-    indexing_time.Clear();
-    profile_radius.Clear();
-    mosaicity_deg.Clear();
-    b_factor.Clear();
-    processing_time.Clear();
-    beam_center_x.Clear();
-    beam_center_y.Clear();
-    pixel_sum.Clear();
+    indexing_solution.Clear(r);
+    indexing_unit_cell_angle.Clear(r);
+    indexing_unit_cell_len.Clear(r);
+    error_pixels.Clear(r);
+    saturated_pixels.Clear(r);
+    strong_pixels.Clear(r);
+    receiver_delay.Clear(r);
+    receiver_free_send_buf.Clear(r);
+    image_collection_efficiency.Clear(r);
+    roi_sum.Clear(r);
+    roi_max_count.Clear(r);
+    roi_pixels.Clear(r);
+    roi_x.Clear(r);
+    roi_y.Clear(r);
+    roi_mean.Clear(r);
+    packets_received.Clear(r);
+    max_value.Clear(r);
+    resolution_estimate.Clear(r);
+    indexing_time.Clear(r);
+    profile_radius.Clear(r);
+    mosaicity_deg.Clear(r);
+    b_factor.Clear(r);
+    processing_time.Clear(r);
+    beam_center_x.Clear(r);
+    beam_center_y.Clear(r);
+    pixel_sum.Clear(r);
 }
 
 void JFJochReceiverPlots::Add(const DataMessage &msg, const AzimuthalIntegrationProfile &profile) {