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[client] Debug: create GUI windows on demand and destroy them on close

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Experiment on top of the memory profiler: the main and Settings windows are no
longer created at startup or kept alive hidden, so an idle tray holds no webview
process. The WindowManager owns creation, rebuilds the main window on the next
show, and defers every show until the frontend reports it has rendered, which
keeps an empty webview off screen.

Measured on macOS: idle footprint drops from ~160 MB to ~74 MB, at the cost of
~150-250 ms per window open.
This commit is contained in:
Zoltan Papp
2026-08-07 14:43:52 +02:00
parent 04ca92d42b
commit bc73e6bd71
7 changed files with 296 additions and 74 deletions
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client/ui/main.go
+22 -30
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@@ -143,13 +143,11 @@ func main() {
prefStore: prefStore,
})
window := newMainWindow(app, prefStore)
// Settings is created eagerly (hidden) so the first gear click paints
// instantly and React keeps per-tab state across reopens. The other
// auxiliary windows stay lazy + destroy-on-close so Wails's macOS
// dock-reopen handler can't resurrect them.
windowManager := services.NewWindowManager(app, window, bundle, prefStore, iconWindow)
windowManager := services.NewWindowManager(app, nil, bundle, prefStore, iconWindow)
windowManager.SetMainFactory(func() *application.WebviewWindow {
return newMainWindow(app, prefStore, windowManager)
})
registerDockReopenHook(app, windowManager)
// Minimal WMs (XEmbed-tray path) neither center small windows nor restore
// position across hide -> show, dropping them top-left. Gate Go-side
// re-centering on that environment; nil leaves placement to the WM on full
@@ -172,7 +170,7 @@ func main() {
// RegisterStatusNotifierItem hits a watcher we control.
startStatusNotifierWatcher()
tray = NewTray(app, window, TrayServices{
tray = NewTray(app, nil, TrayServices{
Connection: connection,
Settings: settings,
Profiles: profiles,
@@ -342,9 +340,7 @@ func registerServices(app *application.App, conn *Conn, s registeredServices) {
app.RegisterService(application.NewService(s.compat))
}
// newMainWindow creates the hidden main window, sized to the user's last view
// mode, and installs the hide-on-close and macOS dock-reopen hooks.
func newMainWindow(app *application.App, prefStore *preferences.Store) *application.WebviewWindow {
func newMainWindow(app *application.App, prefStore *preferences.Store, wm *services.WindowManager) *application.WebviewWindow {
// Width matches the last view mode so Advanced-mode users don't see the
// window pop from 380px to 900px on launch. Height is mode-agnostic.
initialWidth := 380
@@ -372,29 +368,25 @@ func newMainWindow(app *application.App, prefStore *preferences.Store) *applicat
},
})
// Hide instead of quit on close; "really quit" is reached via tray -> Quit.
window.RegisterHook(events.Common.WindowClosing, func(e *application.WindowEvent) {
window.RegisterHook(events.Common.WindowClosing, func(_ *application.WindowEvent) {
if services.ShuttingDown() {
return
}
e.Cancel()
window.Hide()
wm.ForgetMain()
})
// On macOS, Wails' default applicationShouldHandleReopen handler Show()s
// every hidden window on dock-icon click, resurrecting hide-on-close
// surfaces like Settings. Cancel it in a hook (hooks run before listeners)
// and show only the main window. No-op elsewhere — the event never fires.
if runtime.GOOS == "darwin" {
app.Event.RegisterApplicationEventHook(events.Mac.ApplicationShouldHandleReopen, func(e *application.ApplicationEvent) {
e.Cancel()
if e.Context().HasVisibleWindows() {
return
}
window.Show()
window.Focus()
})
}
return window
}
func registerDockReopenHook(app *application.App, wm *services.WindowManager) {
if runtime.GOOS != "darwin" {
return
}
app.Event.RegisterApplicationEventHook(events.Mac.ApplicationShouldHandleReopen, func(e *application.ApplicationEvent) {
e.Cancel()
if e.Context().HasVisibleWindows() {
return
}
wm.ShowMain()
})
}