diff --git a/src/btop_draw.cpp b/src/btop_draw.cpp
index 800357d..d6d97b9 100644
--- a/src/btop_draw.cpp
+++ b/src/btop_draw.cpp
@@ -295,7 +295,7 @@ namespace Draw {
 	}
 
 	bool update_clock(bool force) {
-		const auto& clock_format = Config::getS("clock_format");
+		const std::string_view clock_format = Config::getS("clock_format");
 		if (not Cpu::shown or clock_format.empty()) {
 			if (clock_format.empty() and not Global::clock.empty()) Global::clock.clear();
 			return false;
diff --git a/src/btop_log.cpp b/src/btop_log.cpp
index 17d63b8..286ca6f 100644
--- a/src/btop_log.cpp
+++ b/src/btop_log.cpp
@@ -27,10 +27,10 @@ namespace Logger {
 	using namespace Tools;
 	std::mutex log_mtx{};
 	bool first = true;
-	const string tdf = "%Y/%m/%d (%T) | ";
 
 	size_t loglevel;
 	fs::path logfile;
+	constexpr const std::string_view tdf = "%Y/%m/%d (%T) | ";
 
 	//* Wrapper for lowering priviliges if using SUID bit and currently isn't using real userid
 	class lose_priv {
diff --git a/src/btop_tools.cpp b/src/btop_tools.cpp
index 86de978..074be23 100644
--- a/src/btop_tools.cpp
+++ b/src/btop_tools.cpp
@@ -18,13 +18,15 @@ tab-size = 4
 
 #include <cmath>
 #include <codecvt>
-#include <iostream>
-#include <fstream>
 #include <ctime>
-#include <sstream>
+#include <fstream>
 #include <iomanip>
-#include <utility>
+#include <iostream>
 #include <ranges>
+#include <sstream>
+#include <string>
+#include <string_view>
+#include <utility>
 
 #include <unistd.h>
 #include <termios.h>
@@ -485,11 +487,11 @@ namespace Tools {
 		return new_str;
 	}
 
-	string strf_time(const string& strf) {
+	string strf_time(const std::string_view strf) {
 		auto in_time_t = std::chrono::system_clock::to_time_t(std::chrono::system_clock::now());
 		std::tm bt {};
 		std::stringstream ss;
-		ss << std::put_time(localtime_r(&in_time_t, &bt), strf.c_str());
+		ss << std::put_time(localtime_r(&in_time_t, &bt), strf.data());
 		return ss.str();
 	}
 
diff --git a/src/btop_tools.hpp b/src/btop_tools.hpp
index e2869af..da3bde2 100644
--- a/src/btop_tools.hpp
+++ b/src/btop_tools.hpp
@@ -26,6 +26,7 @@ tab-size = 4
 #include <ranges>
 #include <regex>
 #include <string>
+#include <string_view>
 #include <thread>
 #include <tuple>
 #include <vector>
@@ -303,7 +304,7 @@ namespace Tools {
 	std::string operator*(const string& str, int64_t n);
 
 	//* Return current time in <strf> format
-	string strf_time(const string& strf);
+	string strf_time(const std::string_view strf);
 
 	string hostname();
 	string username();