Speed up initial load 3% by not resolving the same paths over and over again

[MarcSkovMadsen]

I'm on the main branch of Panel trying to find performance improvements.

I can see that its quite expensive (3% of app load time) to lookup the p attribute on the theme. It should not be like that. Its the same path we are loading again and again and again.

The problem is in Param where the raw_path is being resolved again and again.

Reproduce

import panel as pn

N=10

pn.Column(
    *[pn.Row(
        *[pn.pane.Markdown("Hello World") for i in range(N)]
    ) for i in range(N)]
).servable()

Run

 panel serve script.py --autoreload --index script --admin --profiler pyinstrument

Open the app 5 times and inspect the pyinstrument report.

[MarcSkovMadsen]

Will be closed by holoviz/param#890

[philippjfr]

Fix is upstream, so will close.

[github-actions]

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