WARNING: Multiple instances of Three.js being imported.

[EdwardMoyse]

when opening e.g. https://hepsoftwarefoundation.org/phoenix/#/lhcb (but any phoenix instance will show it), I see the following in the log:

WARNING: Multiple instances of Three.js being imported.

This message has been there for ages but apparently this can cause issues such as mem leaks, performance issues, and other undefined behaviour ... so I think we should fix it

[9inpachi]

It's because of JSROOT if I recall correctly.

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On Mon, 25 Mar 2024, 3:23 pm Edward Moyse, ***@***.***> wrote: when opening e.g. https://hepsoftwarefoundation.org/phoenix/#/lhcb (but any phoenix instance will show it), I see the following in the log: WARNING: Multiple instances of Three.js being imported. This message has been there for *ages* but apparently this can cause issues such as mem leaks, performance issues, and other undefined behaviour ... so I think we should fix it — Reply to this email directly, view it on GitHub <#655>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AIZVY6N3OOSOFV2FQ5JJ4HLY2AXONAVCNFSM6AAAAABFHDNXX2VHI2DSMVQWIX3LMV43ASLTON2WKOZSGIYDKOBYGM3DMNA> . You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>

[EdwardMoyse]

Ah seems likely:
https://github.com/root-project/jsroot/blob/7a64fb096d51bfa7e87bf36789e0206f78b08d4c/libs/three/package.json

So, there's not much we can do about this. :-(

[DraTeots]

Found this on threejs

mrdoob/three.js#25681

But not sure it is used here. Could this help in Phoenix case?

[EdwardMoyse]

Found this on threejs

mrdoob/three.js#25681

But not sure it is used here. Could this help in Phoenix case?

Unfortunately I think in this case it really is from jsroot.

[NikhilSharma201]

I think the warning is because the app imports three.js directly but the jsroot also bundles its own three.js and even if they the same version JavaScript will treat them as distinct instance.
A possible fix could be to externalize Three.js in jsroot or ensure both libraries resolve to the same instance via aliasing or peer dependency alignment.