diff --git a/notebooks/AGIPD/Characterize_AGIPD_Gain_Darks_NBC.ipynb b/notebooks/AGIPD/Characterize_AGIPD_Gain_Darks_NBC.ipynb
index 91349824035d28f6969ffdd4a351b7b7767636f6..cc60547a57f228e12bf9315ef3088fbf8ef8425c 100644
--- a/notebooks/AGIPD/Characterize_AGIPD_Gain_Darks_NBC.ipynb
+++ b/notebooks/AGIPD/Characterize_AGIPD_Gain_Darks_NBC.ipynb
@@ -236,8 +236,8 @@
     "# Update modules and karabo_da lists based on available modules to processes.\n",
     "modules = [m for m in modules if m not in missing_modules]\n",
     "karabo_da = create_karabo_da_list(modules)\n",
-    "\n",
-    "step_timer.done_step(f\"Will process data of ({sum(mod_image_size):.02f} GB).\")"
+    "print(f\"Will process data of ({sum(mod_image_size):.02f} GB).\")\n",
+    "step_timer.done_step(\"Checking the data size and availability.\")"
    ]
   },
   {
@@ -692,6 +692,11 @@
     "\n",
     "\n",
     "def retrieve_old_constant(qm, const):\n",
+    "\n",
+    "    import time\n",
+    "\n",
+    "    st = time.time()\n",
+    "\n",
     "    dconst = getattr(iCalibrationDB.Constants.AGIPD, const)()\n",
     "\n",
     "    data, mdata = get_from_db(\n",
@@ -718,15 +723,15 @@
     "            mdata.calibration_constant_version.filename\n",
     "        )\n",
     "        h5path = mdata.calibration_constant_version.h5path\n",
-    "\n",
-    "    return data, timestamp, filepath, h5path\n",
+    "    \n",
+    "    return data, timestamp, filepath, h5path, time.time() - st\n",
     "\n",
     "\n",
     "old_retrieval_pool = multiprocessing.Pool()\n",
     "old_retrieval_res = old_retrieval_pool.starmap_async(\n",
     "    retrieve_old_constant, qm_x_const\n",
     ")\n",
-    "old_retrieval_pool.close()"
+    "old_retrieval_pool.close()\n"
    ]
   },
   {
@@ -934,13 +939,16 @@
     "old_mdata = {}\n",
     "old_retrieval_res.wait()\n",
     "\n",
-    "for (qm, const), (data, timestamp, filepath, h5path) in zip(qm_x_const, old_retrieval_res.get()):\n",
+    "timings = []\n",
+    "for (qm, const), (data, timestamp, filepath, h5path, timing) in zip(qm_x_const, old_retrieval_res.get()):\n",
     "    old_const.setdefault(qm, {})[const] = data\n",
     "    old_mdata.setdefault(qm, {})[const] = {\n",
     "        \"timestamp\": timestamp,\n",
     "        \"filepath\": filepath,\n",
     "        \"h5path\": h5path\n",
-    "    }"
+    "    }\n",
+    "    timings.append(timing)\n",
+    "print(f\"Retrieving old constant took around {np.asarray(timings).mean():.01f} s\")"
    ]
   },
   {