perf: break animator and popup ref cycles, suspend idle timers

Break self -> animator -> lambda cycles in smooth switch and flat scale
by stopping animators and disconnecting value handlers on destroy. Drop
mutual OSD window/osd refs and clear the applet active-popup class ref.

Suspend the dock animation loop when nothing animates, pause the desktop
system info poller while unmapped, replace the OSD watchdog polling with
a single shot at expiry, lower the notch visualizer tick rate, and
cancel outstanding dock occlusion/rebuild timers on teardown.

src/window/desktop/system.py

@@ -37,6 +37,9 @@ class SystemInfoBase(Box):
             all_visible=True,
             **kwargs,
         )
+        self._system_timer_id = None
+        self.connect("map", self._on_map)
+        self.connect("unmap", self._on_unmap)
         self.progress = self.create_progress_bar(name="progress")
         self.main_label = Label(
             label="0%\nLoading", justification="center", name="progress-label"
@@ -65,14 +68,39 @@ class SystemInfoBase(Box):
         )
 
     def start_updates(self):
-        self.update()
-        self._system_timer_id = invoke_repeater(SYSTEM_UPDATE_INTERVAL, self.update)
+        self._start_update_timer()
+
+    def _start_update_timer(self):
+        self._stop_update_timer()
+        if not self.get_mapped():
+            return
+        self._system_timer_id = invoke_repeater(
+            SYSTEM_UPDATE_INTERVAL, self._update_tick
+        )
+
+    def _stop_update_timer(self):
+        if getattr(self, "_system_timer_id", None):
+            try:
+                GLib.source_remove(self._system_timer_id)
+            except Exception as e:
+                logger.error(f"Error removing system info timer: {e}")
+            self._system_timer_id = None
+
+    def _update_tick(self) -> bool:
+        if not self.get_mapped():
+            self._system_timer_id = None
+            return False
+        return self.update()
+
+    def _on_map(self, *_):
+        self._start_update_timer()
+
+    def _on_unmap(self, *_):
+        self._stop_update_timer()
 
     def destroy(self):
         """Cleanup system info update timer"""
-        if hasattr(self, "_system_timer_id") and self._system_timer_id:
-            GLib.source_remove(self._system_timer_id)
-            self._system_timer_id = None
+        self._stop_update_timer()
         super().destroy()
 
     def create_info_line(

src/window/dock/animator.py

@@ -64,4 +64,12 @@ class DockAnimator:
             canvas._needs_redraw = False
             canvas.queue_draw()
 
+        # Self-pause: stop ticking once nothing is animating and no redraw is
+        # pending, so an idle dock consumes zero CPU. Restarted on mouse
+        # motion/enter, size changes or model rebuilds.
+        if not dirty and not canvas._needs_redraw:
+            self._running = False
+            self._timer_id = None
+            return False
+
         return self._running

src/window/dock/canvas.py

@@ -163,6 +163,9 @@ class DockCanvas(Gtk.DrawingArea):
 
     def _on_size_allocate(self, widget, allocation) -> None:
         self._needs_redraw = True
+        animator = getattr(self, "animator", None)
+        if animator is not None:
+            animator.start()
 
     def do_get_preferred_height(self):
         h = self._canvas_height()
@@ -327,6 +330,7 @@ class DockCanvas(Gtk.DrawingArea):
 
         self.model.items = new_items
         self._needs_redraw = True
+        self.animator.start()
 
     def _update_trash_item(
         self,
@@ -459,7 +463,7 @@ class DockCanvas(Gtk.DrawingArea):
     def debounced_update_dock_apps(self) -> None:
         if self._dock_update_timer:
             GLib.source_remove(self._dock_update_timer)
-        self._dock_update_timer = GLib.timeout_add(50, self._do_update)
+        self._dock_update_timer = GLib.timeout_add(100, self._do_update)
 
     def _do_update(self) -> bool:
         self._dock_update_timer = None

src/window/dock/main.py

@@ -57,6 +57,7 @@ class Dock(Window):
         self.is_hovered = False
         self.hide_ticket = 0
         self._occlusion_timer_id = None
+        self._occlusion_check_pending = False
         self._hyprland_handlers = []
         self._destroyed = False
 
@@ -87,14 +88,15 @@ class Dock(Window):
 
     def _check_occlusion_deferred(self) -> None:
         """Debounce occlusion check to avoid rapid successive checks."""
-        if hasattr(self, "_occlusion_check_pending") and self._occlusion_check_pending:
+        if self._occlusion_check_pending:
             return
         self._occlusion_check_pending = True
-        GLib.timeout_add(50, self._run_occlusion_check)
+        self._occlusion_timer_id = GLib.timeout_add(50, self._run_occlusion_check)
 
     def _run_occlusion_check(self) -> bool:
         """Run the actual occlusion check."""
         self._occlusion_check_pending = False
+        self._occlusion_timer_id = None
         if self._destroyed:
             return False
         try:
@@ -138,7 +140,9 @@ class Dock(Window):
         if config().get("dock.enabled", True):
             self.show()
             self.revealer.set_reveal_child(True)
+            self.canvas.animator.start()
         else:
+            self.canvas.animator.stop()
             self.hide()
 
     def on_hover_enter(self) -> None:
@@ -165,6 +169,7 @@ class Dock(Window):
 
     def _disconnect_occlusion_signals(self) -> None:
         """Disconnect all Hyprland occlusion signal handlers."""
+        self._cancel_occlusion_timer()
         hyprland = get_modus_service()._hyprland_connection
         for handler_id in self._hyprland_handlers:
             try:
@@ -173,8 +178,20 @@ class Dock(Window):
                 logger.warning(f"[Dock] Error disconnecting occlusion handler: {e}")
         self._hyprland_handlers.clear()
 
+    def _cancel_occlusion_timer(self) -> None:
+        if self._occlusion_timer_id is not None:
+            try:
+                GLib.source_remove(self._occlusion_timer_id)
+            except Exception as e:
+                logger.debug(
+                    f"[Dock] Failed to remove occlusion timer {self._occlusion_timer_id}: {e}"
+                )
+            self._occlusion_timer_id = None
+        self._occlusion_check_pending = False
+
     def destroy(self) -> None:
         self._destroyed = True
+        self._cancel_occlusion_timer()
         self._disconnect_occlusion_signals()
         from services.config import off_config_change
 

src/window/osd/components/base.py

@@ -43,6 +43,8 @@ class BaseOSDContainer(Box):
     def _on_leave_notify(self, widget, event):
         if event.detail != Gdk.NotifyType.INFERIOR:
             self._is_hovered = False
+            if self.watchdog_handler and self.window.get_visible():
+                self._schedule_watchdog()
 
     def is_hovered(self):
         return self._is_hovered
@@ -92,20 +94,27 @@ class BaseOSDContainer(Box):
         self.window.hide()
         return False
 
+    def _schedule_watchdog(self) -> None:
+        """Arm a single-shot watchdog that hides the OSD at MAX_VISIBLE_TIME."""
+        self.remove_watchdog_handler()
+        remaining = self.show_timestamp + self.MAX_VISIBLE_TIME - time.time()
+        delay_ms = max(50, int(remaining * 1000))
+        self.watchdog_handler = GLib.timeout_add(delay_ms, self.watchdog_force_hide)
+
     def watchdog_force_hide(self, *_):
+        self.watchdog_handler = 0
         if not self.window.get_visible():
             self.cleanup_all_handlers()
             return False
 
-        elapsed = time.time() - self.show_timestamp
-        if elapsed >= self.MAX_VISIBLE_TIME:
-            if not self.is_hovered():
-                self.hide_window()
-                self.cleanup_all_handlers()
-                return False
-            else:
-                return True
-        return True
+        if self.is_hovered():
+            # Keep the OSD visible while hovered; re-check periodically.
+            self.watchdog_handler = GLib.timeout_add(500, self.watchdog_force_hide)
+            return False
+
+        self.hide_window()
+        self.cleanup_all_handlers()
+        return False
 
     def update(self, *_):
         if self._update_in_progress:
@@ -130,7 +139,7 @@ class BaseOSDContainer(Box):
 
         self.focus()
         self.last_handler = invoke_repeater(1700, self.unfocus, initial_call=False)
-        self.watchdog_handler = GLib.timeout_add(1000, self.watchdog_force_hide)
+        self._schedule_watchdog()
         self._update_in_progress = False
 
     def focus(self, *_):

src/window/osd/main.py

@@ -51,6 +51,11 @@ class OSD(Box):
             return
         self.show_container(self.containers.get("brightness"))
 
+    def destroy(self):
+        """Break the OSD <-> window reference cycle before teardown."""
+        self.window = None
+        super().destroy()
+
 
 class OSDWindow(Window):
     def __init__(self, **kwargs):
@@ -81,3 +86,11 @@ class OSDWindow(Window):
         if not get_config("panel.osd", True):
             return
         self.osd.containers["brightness"].update()
+
+    def destroy(self):
+        """Break the OSD <-> window reference cycle before teardown."""
+        osd = getattr(self, "osd", None)
+        self.osd = None
+        if osd is not None:
+            osd.window = None
+        super().destroy()

src/window/panel/notch/player.py

@@ -12,7 +12,7 @@ from utils.gtk_utils import svg_file
 
 # tunables
 _BARS = 8  # number of bars
-_TICK_MS = 150  # ~7 fps — smooth with sine, very cheap
+_TICK_MS = 300  # ~3 fps — wall-clock sine curve, cheaper sampling
 _H_MIN = 2  # minimum total bar height (px, both halves)
 _H_MAX = 16  # maximum total bar height (px)
 _BAR_W = 1  # bar pixel width