make hyperspeed not update ui so much

bench/bench_window.cpp

@@ -141,6 +141,8 @@ const lib94::warrior *bench_window::do_step() {
   return result;
 }
 
+static constexpr std::chrono::nanoseconds min_hyperspeed_ui_update_distance(1000000);
+
 void bench_window::runner_main() {
   std::chrono::system_clock::time_point last_step = std::chrono::system_clock::now();
 
@@ -154,10 +156,21 @@ void bench_window::runner_main() {
       break;
 
     core_mutex.unlock();
+
+    if (runner_hyperspeed) {
+      std::chrono::system_clock::time_point now = std::chrono::system_clock::now();
+      if (now - last_hyperspeed_ui_update >= min_hyperspeed_ui_update_distance) {
+        last_hyperspeed_ui_update = now;
+        runner_update_ui_dispatcher.emit();
+      }
+    }
+
+    else {
       runner_update_ui_dispatcher.emit();
-    if (!runner_hyperspeed)
       std::this_thread::sleep_until(last_step + time_between_steps);
       last_step = std::chrono::system_clock::now();
+    }
+
     core_mutex.lock();
   }
 

bench/bench_window.hpp

@@ -109,6 +109,8 @@ private:
   std::thread runner;
   bool runner_active;
 
+  std::chrono::system_clock::time_point last_hyperspeed_ui_update;
+
   void update_buttons();
   void update_ui();