junction window is slow

[symphorien]

Describe the bug

running re.sonny.Junction from nix-shell -p junction displays a transparent window which is only drawn after 40 seconds (I timed it, it's not an exaggeration). Similarly, clicking the menu button takes about 20s to display the menu. Only the close button is "fast".

Steps To Reproduce

Steps to reproduce the behavior:

1. run re.sonny.Junction
2. it's slow
3. ...

Expected behavior

it displays fast

Screenshots

on the right is the transparent window and my wallpaper.

Additional context

I'm not running gnome, but xfce+i3+picom if it's relevant. But as junction eventually works, something is probably not missing.

Notify maintainers

cc @hqurve

Metadata

• system: "x86_64-linux"
• host os: Linux 5.15.74, NixOS, 22.11 (Raccoon), 22.11pre420601.b39fd6e4ede
• multi-user?: yes
• sandbox: yes
• version: nix-env (Nix) 2.11.0
• channels(root): "nixos, nixos-unstable"
• channels(symphorien): "home-manager"
• nixpkgs: /nix/var/nix/profiles/per-user/root/channels/nixos

[wamserma]

Opens within a few seconds here with LXQt on a twelve-year old CPU...
tested with: /nix/store/fiml1gm3cqh6ym8yqd6jph72gvlyvqj3-junction-1.5.0/bin/re.sonny.Junction

[hqurve]

I'm using plasma on unstable and I experience normal app delay. (1-2 seconds). /nix/store/b58zd02jvalgx9ab0w13qgbg36fxzsii-junction-1.5.0/bin/re.sonny.Junction (Maybe one or two iterations old).

There is sonnyp/Junction#45; however, I do not know how applicable it is. I tried to follow the steps using a shell based on the derivation (plus blueprint-compiler) but I encounter the following error

❯ time ./re.sonny.Junction --terminate_after_init

(re.sonny.Junction:184189): Gjs-WARNING **: 22:07:47.547: JS ERROR: TypeError: source is null
_init@resource:///org/gnome/gjs/modules/core/overrides/Gio.js:705:1
@resource:///re/sonny/Junction/common.js:3:25
@file:///home/joshua/kde/src/Junction/re.sonny.Junction:49:6

(will try again tomorrow)

PS: Also thanks, I didnt realize that I needed to update junction to 1.6 (I'll try to do it soon™, .... but its a javascript dependency)

[symphorien]

$  time re.sonny.Junction --terminate_after_init 
re.sonny.Junction --terminate_after_init  0.07s user 0.03s system 65% cpu 0.152 total

Note: the issue does not happen with the flatpak.

[symphorien]

it's actually caused by setting WEBKIT_DISABLE_COMPOSITING_MODE to 1, a workaround to #32580