diff --git a/MP-Site/WebUserControls/mod_listaStatiEventi.ascx.cs b/MP-Site/WebUserControls/mod_listaStatiEventi.ascx.cs
index ad8ce0ec..86551206 100644
--- a/MP-Site/WebUserControls/mod_listaStatiEventi.ascx.cs
+++ b/MP-Site/WebUserControls/mod_listaStatiEventi.ascx.cs
@@ -1,5 +1,6 @@
 using SteamWare;
 using System;
+using System.Collections.Generic;
 using System.Web.UI;
 
 namespace MP_SITE.WebUserControls
@@ -92,15 +93,28 @@ namespace MP_SITE.WebUserControls
         public string operatoreDaMatr(object matricola)
         {
             int matr = 0;
+            string answ = "N.A.";
             try
             {
                 matr = Convert.ToInt32(matricola);
             }
             catch
             { }
-            return _resoconti.oprDaMatr(matr);
+            // cerco in LUT...
+            if (OprLUT.ContainsKey(matr))
+            {
+                answ = OprLUT[matr];
+            }
+            else
+            {
+                answ = _resoconti.oprDaMatr(matr);
+                OprLUT.Add(matr, answ);
+            }
+            return answ;
         }
 
+        protected Dictionary<int, string> OprLUT = new Dictionary<int, string>();
+
         public void reportUpdt(object sender, EventArgs e)
         {
             reportUpdate();
@@ -132,6 +146,7 @@ namespace MP_SITE.WebUserControls
             _resoconti = new resoconti();
             if (!Page.IsPostBack)
             {
+                OprLUT = new Dictionary<int, string>();
                 aggiornamento();
             }
             mod_logStati.eh_doUpdate += Mod_logStati_eh_doUpdate;
diff --git a/MapoDb/resoconti.cs b/MapoDb/resoconti.cs
index 7dac145c..17a775f1 100644
--- a/MapoDb/resoconti.cs
+++ b/MapoDb/resoconti.cs
@@ -268,7 +268,7 @@ public class resoconti
         try
         {
             DS_applicazione.AnagraficaOperatoriRow riga = AnagOpr.FindByMatrOpr(matr);
-            answ = string.Format("{0} {1}", riga.Cognome, riga.Nome);
+            answ = $"{riga.Cognome} {riga.Nome}";
         }
         catch
         { }
@@ -615,15 +615,16 @@ public class resoconti
     {
         get
         {
-            if (!memLayer.ML.isInCacheObject("AnagOpr"))
+            string keyName = "AnagOpr";
+            if (!memLayer.ML.isInCacheObject(keyName))
             {
                 _AnagOpr = taAnagOpr.GetData();
                 string serVal = JsonConvert.SerializeObject(_AnagOpr);
-                memLayer.ML.setCacheVal("AnagOpr", serVal, true);
+                memLayer.ML.setCacheVal(keyName, serVal, true);
             }
             else
             {
-                string redKey = memLayer.ML.redHash("AnagOpr");
+                string redKey = memLayer.ML.redHash(keyName);
                 string serVal = memLayer.ML.getRSV(redKey);
                 _AnagOpr = JsonConvert.DeserializeObject<DS_applicazione.AnagraficaOperatoriDataTable>(serVal);
             }