Unusually long load times with trame-router and pyvista when changing actor attributes.

Hello (again),

I'll preface by saying: this might be more of a pyvista issue, but I noticed it's only happening when I use it in-conjunction with trame-router.

Please see the following demo code below as well as the output of my pip freeze.

I have two RouterViewLayouts which each render a single pyvista actor (just a colored sphere). However, on each route /path1 and path2/ I have toggle buttons which are supposed to enable/disable the visibility of the actors.

Here's what I've noticed: On /path1: The visibility toggle does not work at all or works extremely slowly. On /path2 The visibility toggle is almost instant/functions as intended.

If I swap the ordering of the RouterViewLayouts in my code, this behavior swaps too: Visibility toggling in /path2 now doesn't work and it now works for /path1

Please let me know if you have any advice

from trame.app import get_server
from trame.ui.router import RouterViewLayout
from trame.widgets import vuetify3, router

from trame_vuetify.widgets import vuetify3
from trame_vuetify.ui.vuetify3 import SinglePageLayout

import pyvista as pv
from pyvista.trame.ui import plotter_ui

pv.OFF_SCREEN = True

server = get_server(client_type="vue3")
state, ctrl = server.state, server.controller

with SinglePageLayout(server) as layout:
    with layout.content as body:
        router.RouterView()

pl_1 = pv.Plotter()
actor_1 = pl_1.add_mesh(pv.Sphere(), color="red")

with RouterViewLayout(server, "/path1") as layout:
    layout.root.style = "width: 100%; height: 100%;"

    @state.change("toggle_visibility_1")
    def toggle_visibility_1(toggle_visibility_1=True, **kwargs):
        print("toggle_visibility_1")
        actor_1.visibility = toggle_visibility_1
        # Need to update the view and the image
        ctrl.view_update()
        ctrl.view_update_image()

    view_1 = plotter_ui(pl_1)
    ctrl.view_update = view_1.update
    ctrl.view_update_image = view_1.update_image
    ctrl.reset_camera = view_1.reset_camera

    with vuetify3.VAppBar() as toolbar:
        vuetify3.VSwitch(
            v_model=("toggle_visibility_1", True),
            label="Toggle visibility 1",
            hide_details=True,
        )

pl_2 = pv.Plotter()
actor_2 = pl_2.add_mesh(pv.Sphere(), color="blue")

with RouterViewLayout(server, "/path2") as layout:
    layout.root.style = "width: 100%; height: 100%;"

    @state.change("toggle_visibility_2")
    def toggle_visibility_2(toggle_visibility_2=True, **kwargs):
        print("toggle_visibility_2")
        actor_2.visibility = toggle_visibility_2
        # Need to update the view and the image
        ctrl.view_update()
        ctrl.view_update_image()

    view_2 = plotter_ui(pl_2)
    ctrl.view_update = view_2.update
    ctrl.view_update_image = view_2.update_image
    ctrl.reset_camera = view_2.reset_camera

    with vuetify3.VAppBar() as toolbar:
        vuetify3.VSwitch(
            v_model=("toggle_visibility_2", True),
            label="Toggle visibility 2",
            hide_details=True,
        )

if __name__ == "__main__":
    server.start()

Pip freeze:

aiohappyeyeballs==2.4.0
aiohttp==3.10.5
aiosignal==1.3.1
attrs==24.2.0
certifi==2024.8.30
charset-normalizer==3.3.2
contourpy==1.3.0
cycler==0.12.1
fonttools==4.53.1
frozenlist==1.4.1
idna==3.10
kiwisolver==1.4.7
matplotlib==3.9.2
more-itertools==10.5.0
msgpack==1.1.0
multidict==6.1.0
numpy==2.1.1
packaging==24.1
pillow==10.4.0
platformdirs==4.3.6
pooch==1.8.2
pyparsing==3.1.4
python-dateutil==2.9.0.post0
pyvista==0.44.1
requests==2.32.3
scooby==0.10.0
six==1.16.0
trame==3.6.5
trame-client==3.2.5
trame-router==2.3.0
trame-server==3.2.0
trame-vtk==2.8.10
trame-vuetify==2.7.1
typing_extensions==4.12.2
urllib3==2.2.3
vtk==9.3.1
wslink==2.2.1
yarl==1.11.1

Kitware / trame-router

Unusually long load times with trame-router and pyvista when changing actor attributes. #6