diff --git a/libs/prof/include/psemek/prof/profiler.hpp b/libs/prof/include/psemek/prof/profiler.hpp
index bd1796c8..daa9d935 100644
--- a/libs/prof/include/psemek/prof/profiler.hpp
+++ b/libs/prof/include/psemek/prof/profiler.hpp
@@ -3,7 +3,7 @@
 #include <psemek/util/clock.hpp>
 #include <psemek/log/level.hpp>
 
-#include <string>
+#include <string_view>
 
 namespace psemek::prof
 {
@@ -12,7 +12,7 @@ namespace psemek::prof
 
 	struct profiler
 	{
-		profiler(std::string const & name);
+		profiler(std::string_view name);
 		profiler(profiler && other);
 		profiler(profiler const & other) = delete;
 
@@ -21,12 +21,12 @@ namespace psemek::prof
 
 		~profiler();
 
-		static void start_frame(std::string const & name);
-		static void push(std::string const & name, std::chrono::duration<double> duration, std::size_t count = 1);
+		static void start_frame(std::string_view name);
+		static void push(std::string_view name, std::chrono::duration<double> duration, std::size_t count = 1);
 		static void end_frame(std::chrono::duration<double> duration);
 
 		template <typename Duration>
-		static void push(std::string const & name, Duration duration, std::size_t count = 1)
+		static void push(std::string_view name, Duration duration, std::size_t count = 1)
 		{
 			push(name, std::chrono::duration_cast<std::chrono::duration<double>>(duration), count);
 		}
diff --git a/libs/prof/source/profiler.cpp b/libs/prof/source/profiler.cpp
index a7f03b03..6d1785a3 100644
--- a/libs/prof/source/profiler.cpp
+++ b/libs/prof/source/profiler.cpp
@@ -23,15 +23,15 @@ namespace psemek::prof
 
 			util::statistics_log_bucket<double> execution_time{0.05};
 
-			std::map<std::string, profiler_tree> children;
+			std::map<std::string, profiler_tree, std::less<>> children;
 			std::vector<std::map<std::string, profiler_tree>::iterator> children_list;
 
-			profiler_tree * child(std::string const & name)
+			profiler_tree * child(std::string_view const & name)
 			{
 				auto it = children.find(name);
 				if (it == children.end())
 				{
-					it = children.insert({name, profiler_tree{}}).first;
+					it = children.insert({std::string(name), profiler_tree{}}).first;
 					it->second.parent = this;
 					it->second.mutex = mutex;
 					children_list.push_back(it);
@@ -174,7 +174,7 @@ namespace psemek::prof
 		dump_impl(merged_tree(), 0, level);
 	}
 
-	profiler::profiler(std::string const & name)
+	profiler::profiler(std::string_view name)
 	{
 		get_current();
 
@@ -204,7 +204,7 @@ namespace psemek::prof
 		report();
 	}
 
-	void profiler::start_frame(std::string const & name)
+	void profiler::start_frame(std::string_view name)
 	{
 		get_current();
 
@@ -212,7 +212,7 @@ namespace psemek::prof
 		current = current->child(name);
 	}
 
-	void profiler::push(std::string const & name, std::chrono::duration<double> duration, std::size_t count)
+	void profiler::push(std::string_view name, std::chrono::duration<double> duration, std::size_t count)
 	{
 		get_current();