# UNDF: UNDF-2026-000001005
--- a/regamedll/game_shared/bot/bot_profile.cpp
+++ b/regamedll/game_shared/bot/bot_profile.cpp
@@ -590,13 +590,24 @@
 }

 // Return random unused profile that matches the given difficulty level
+// DEFECT: UTIL_IsNameTaken called per-profile O(P*C) where P=profiles, C=clients
+// FIX: build taken-name set once O(C), then check O(1) per profile
 const BotProfile *BotProfileManager::GetRandomProfile(BotDifficultyType difficulty, BotProfileTeamType team) const
 {
 #ifdef RANDOM_LONG
 	BotProfileList::const_iterator iter;

+	// Build set of taken names once, instead of scanning players per profile
+	std::set<std::string> takenNames;
+	for (int i = 1; i <= gpGlobals->maxClients; ++i)
+	{
+		CBasePlayer *player = static_cast<CBasePlayer *>(UTIL_PlayerByIndex(i));
+		if (player && player->IsBot())
+			takenNames.insert(static_cast<CBot *>(player)->GetProfile()->GetName());
+		else if (player && !FNullEnt(player->pev) && STRING(player->pev->netname)[0])
+			takenNames.insert(STRING(player->pev->netname));
+	}
+
 	// count up valid profiles
 	int validCount = 0;
 	for (iter = m_profileList.begin(); iter != m_profileList.end(); ++iter)
@@ -604,7 +615,7 @@
 		const BotProfile *profile = (*iter);

-		if (profile->IsDifficulty(difficulty) && !UTIL_IsNameTaken(profile->GetName()) && profile->IsValidForTeam(team))
+		if (profile->IsDifficulty(difficulty) && takenNames.find(profile->GetName()) == takenNames.end() && profile->IsValidForTeam(team))
 			++validCount;
 	}

@@ -616,7 +627,7 @@
 	{
 		const BotProfile *profile = (*iter);

-		if (profile->IsDifficulty(difficulty) && !UTIL_IsNameTaken(profile->GetName()) && profile->IsValidForTeam(team))
+		if (profile->IsDifficulty(difficulty) && takenNames.find(profile->GetName()) == takenNames.end() && profile->IsValidForTeam(team))
 		{
 			if (which-- == 0)
 				return profile;