Remove 10 ms sleep hidden inside SDL_WaitEvent(). This fixes mouse polling rate being capped at 100 Hz (1 second / 10 ms) and the rendering FPS being capped at 90 FPS.

app/streaming/session.cpp

@@ -667,7 +667,15 @@ void Session::exec()
     // Hijack this thread to be the SDL main thread. We have to do this
     // because we want to suspend all Qt processing until the stream is over.
     SDL_Event event;
-    while (SDL_WaitEvent(&event)) {
+    for (;;) {
+        // We explicitly use SDL_PollEvent() and SDL_Delay() because
+        // SDL_WaitEvent() has an internal SDL_Delay(10) inside which
+        // blocks this thread too long for high polling rate mice and high
+        // refresh rate displays.
+        if (!SDL_PollEvent(&event)) {
+            SDL_Delay(1);
+            continue;
+        }
         switch (event.type) {
         case SDL_QUIT:
             SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION,