diff --git a/libs/util/source/profiler.cpp b/libs/util/source/profiler.cpp
index 3f918fbe..2dced95c 100644
--- a/libs/util/source/profiler.cpp
+++ b/libs/util/source/profiler.cpp
@@ -25,6 +25,18 @@ namespace psemek::util
 			statistics<double> execution_time;
 
 			std::map<std::string, profiler_tree> children;
+			std::vector<std::map<std::string, profiler_tree>::iterator> children_list;
+
+			profiler_tree * child(std::string const & name)
+			{
+				auto it = children.find(name);
+				if (it == children.end())
+				{
+					it = children.insert({name, profiler_tree{}}).first;
+					children_list.push_back(it);
+				}
+				return &(it->second);
+			}
 		};
 
 		static std::map<std::thread::id, profiler_tree> roots;
@@ -73,11 +85,12 @@ namespace psemek::util
 		{
 			std::size_t max_name_length = 0;
 
-			for (auto const & c : node.children)
-				max_name_length = std::max(max_name_length, c.first.size());
+			for (auto it : node.children_list)
+				max_name_length = std::max(max_name_length, it->first.size());
 
-			for (auto const & c : node.children)
+			for (auto it : node.children_list)
 			{
+				auto const & c = *it;
 				auto const & stat = c.second.execution_time;
 				if (stat.count() == 1)
 					log::info() << std::string(depth * 2, ' ') << std::setw(max_name_length + 3) << std::left << std::setfill(' ') << c.first
@@ -98,16 +111,17 @@ namespace psemek::util
 		{
 			t1.execution_time = merge(t1.execution_time, t2.execution_time);
 
-			for (auto const & p : t2.children)
+			for (auto it2 : t2.children_list)
 			{
-				auto it = t1.children.find(p.first);
-				if (it == t1.children.end())
+				auto it1 = t1.children.find(it2->first);
+				if (it1 == t1.children.end())
 				{
-					t1.children.insert(p);
+					it1 = t1.children.insert(*it2).first;
+					t1.children_list.push_back(it1);
 				}
 				else
 				{
-					it->second = merge(std::move(it->second), p.second);
+					it1->second = merge(std::move(it1->second), it2->second);
 				}
 			}
 
@@ -150,7 +164,7 @@ namespace psemek::util
 
 		std::lock_guard lock{*(current->mutex)};
 
-		auto next = &current->children[name];
+		auto next = current->child(name);
 		next->parent = current;
 		next->mutex = current->mutex;
 		current = next;
@@ -178,7 +192,7 @@ namespace psemek::util
 
 		std::lock_guard lock{*(current->mutex)};
 
-		auto child = &current->children[name];
+		auto child = current->child(name);
 		child->parent = current;
 		child->mutex = current->mutex;
 		child->execution_time.push(duration.count());