Slow startup of Ghostty (1.1.2) with multiple warnings on Debian Trixie

[Hoastar]

Ghostty terminal takes significantly longer to launch compared to other terminals (e.g., GNOME Terminal), accompanied by multiple warnings and unimplemented features in logs. Key observations:
i: Unimplemented GTK Actions:
a.warning(gtk): unimplemented action=apprt.action.Action.Key.cell_size
b.warning(gtk): unable to get current color scheme: Timeout was reached
ii:Unsupported OSC Commands:
a.unimplemented OSC callback: end_of_command
iii:Semantic Prompts Issues:
a.Repeated unknown semantic prompts option: special_key
iv:GPU Buffer Reallocation:
a.info(grid): reallocating GPU buffer old=0 new=105

ENV:
Ghostty: 1.1.2 (ReleaseFast)
OS: Debian GNU/Linux trixie/sid x86_64
Kernel: 6.12.12-amd64
DE: GNOME 47.3 (Mutter X11)
GPU: Integrated (ThinkPad T480) + External ASUS VG249
GTK: 4.17.4 (libadwaita 1.7.0)
Shell: fish 4.0b1 (integration enabled)

[Hoastar]

From the following log output, there is an obvious sense of obstruction.

info(grid): loaded OpenGL 4.5
info(io_exec): found Ghostty resources dir: /usr/share/ghostty
info(io_exec): shell integration automatically injected shell=termio.shell_integration.Shell.fish
warning(gtk): unimplemented action=apprt.action.Action.Key.cell_size
info(io_exec): started subcommand path=/bin/sh pid=41348
info(io_exec): subcommand cgroup=-
warning(stream): unimplemented OSC callback: terminal.osc.Command{ .end_of_command = terminal.osc.Command.Command__struct_92012{ .exit_code = null } }
warning(stream): unimplemented OSC command: end_of_command
info(osc): unknown semantic prompts option: special_key
warning(gtk): unable to get current color scheme: GDBus.Error:org.freedesktop.DBus.Error.TimedOut: Failed to activate service 'org.freedesktop.portal.Desktop': timed out (service_start_timeout=120000ms)
info(grid): reallocating GPU buffer old=0 new=105
info(osc): unknown semantic prompts option: special_key

[jcollie]

warning(gtk): unable to get current color scheme: GDBus.Error:org.freedesktop.DBus.Error.TimedOut: Failed to activate service 'org.freedesktop.portal.Desktop': timed out (service_start_timeout=120000ms)

You need to be running xdg-portal-desktop-gtk to get rid of this warning.

[pluiedev]

GNOME not having a working XDG portal is really weird though. I wonder if something else is going on in here

[00-kat]

warning(gtk): unimplemented action=apprt.action.Action.Key.cell_size

I'm not sure if this one is problematic; I've always got this too and never noticed any issues due to it.

unimplemented OSC callback: end_of_command

I'm not sure if this one is problematic either, though someone else could probably comment on this better than I could.

info(grid): reallocating GPU buffer old=0 new=105

This isn't a warning, and it's perfectly normal.