diff --git a/Tools/BiblioTech/Rewards/RoleModifyContext.cs b/Tools/BiblioTech/Rewards/RoleModifyContext.cs
index 3fbc5132..9b38dcea 100644
--- a/Tools/BiblioTech/Rewards/RoleModifyContext.cs
+++ b/Tools/BiblioTech/Rewards/RoleModifyContext.cs
@@ -10,6 +10,8 @@ namespace BiblioTech.Rewards
     {
         private Dictionary<ulong, IGuildUser> users = new();
         private Dictionary<ulong, SocketRole> roles = new();
+        private DateTime lastLoad = DateTime.MinValue;
+
         private readonly SocketGuild guild;
         private readonly UserRepo userRepo;
         private readonly ILog log;
@@ -25,8 +27,14 @@ namespace BiblioTech.Rewards
 
         public async Task Initialize()
         {
-            this.users = await LoadAllUsers(guild);
-            this.roles = LoadAllRoles(guild);
+            var span = DateTime.UtcNow - lastLoad;
+            if (span > TimeSpan.FromMinutes(10))
+            {
+                lastLoad = DateTime.UtcNow;
+                log.Log("Loading all users and roles...");
+                this.users = await LoadAllUsers(guild);
+                this.roles = LoadAllRoles(guild);
+            }
         }
 
         public IGuildUser[] Users => users.Values.ToArray();
@@ -76,7 +84,6 @@ namespace BiblioTech.Rewards
 
         private async Task<Dictionary<ulong, IGuildUser>> LoadAllUsers(SocketGuild guild)
         {
-            log.Log("Loading all users..");
             var result = new Dictionary<ulong, IGuildUser>();
             var users = guild.GetUsersAsync();
             await foreach (var ulist in users)
diff --git a/Tools/BiblioTech/UserRepo.cs b/Tools/BiblioTech/UserRepo.cs
index 07831dd6..701fdfe9 100644
--- a/Tools/BiblioTech/UserRepo.cs
+++ b/Tools/BiblioTech/UserRepo.cs
@@ -122,20 +122,17 @@ namespace BiblioTech
         {
             if (address == null) return null;
 
-            // If this becomes a performance problem, switch to in-memory cached list.
-            var files = Directory.GetFiles(Program.Config.UserDataPath);
-            foreach (var file in files)
+            var lower = address.Address.ToLowerInvariant();
+            if (string.IsNullOrEmpty(lower)) return null;
+
+            if (cache.Count == 0) LoadAllUserData();
+            foreach (var item in cache.Values)
             {
-                try
+                if (item.CurrentAddress != null &&
+                    item.CurrentAddress.Address.ToLowerInvariant() == lower)
                 {
-                    var user = JsonConvert.DeserializeObject<UserData>(File.ReadAllText(file))!;
-                    if (user.CurrentAddress != null &&
-                        user.CurrentAddress.Address == address.Address)
-                    {
-                        return user;
-                    }
+                    return item;
                 }
-                catch { }
             }
 
             return null;