refactor(gameplay): use steady clock and sleep_until for tick loop timing

src/gameplay/client_world.cpp

@@ -289,17 +289,17 @@ void ClientWorld::hot_reload() {
 
 void ClientWorld::client_run(std::stop_token stoken) {
     Logger::info("Client Thread Started");
-    while (!stoken.stop_requested()) {
+    using Clock = std::chrono::steady_clock;
-        auto t1 = system_clock::now();
 
+    constexpr auto TICK = std::chrono::milliseconds(DEFAULT_PER_TICK_TIME);
+
+    auto next = Clock::now();
+    while (!stoken.stop_requested()) {
+        next += TICK;
         for (auto& x : m_timers) {
             x.second.update();
         }
-
+        std::this_thread::sleep_until(next);
-        auto t2 = system_clock::now();
-        auto dt = duration_cast<microseconds>(t2 - t1);
-        auto st = std::max(dt, milliseconds(DEFAULT_PER_TICK_TIME) - dt);
-        std::this_thread::sleep_for(st);
     }
 }
 

src/gameplay/server_world.cpp

@@ -299,18 +299,19 @@ void ServerWorld::stop_thread_pool() {
 
 void ServerWorld::serever_run(std::stop_token stoken) {
     Logger::info("Server Thread Started!");
-    while (!stoken.stop_requested()) {
-        auto t1 = system_clock::now();
 
+    using Clock = std::chrono::steady_clock;
+    constexpr auto TICK = std::chrono::milliseconds(DEFAULT_PER_TICK_TIME);
+
+    auto next = Clock::now();
+    while (!stoken.stop_requested()) {
+        next += TICK;
         if (m_tick_running) {
             ++m_game_ticks;
             m_day_tick = (m_day_tick + 1) % DAY_TIME;
         }
         update();
-        auto t2 = system_clock::now();
+        std::this_thread::sleep_until(next);
-        auto dt = duration_cast<microseconds>(t2 - t1);
-        auto st = std::max(dt, milliseconds(m_per_tick_time) - dt);
-        std::this_thread::sleep_for(st);
     }
     Logger::info("Server Thread Stopped!");
 }