*: prerelease fixes

[tharvik]

on the way to v3, we have some stuff to iron out, tracked in #686.
taking over some from there.

• update {Trainer,Model}.fit to return async iterators to follow progression of every part of processing. allows for more reactive UI as it refreshes on every batch rather on every round.
  • I don't really like how async iterators are handled in JS (no easy way to get return values), added an "utils" module to ease its use
  • there is not ETA but it helps users not get borded by a slow interface.
• commonize branding to have the same "DISCO" everywhere
• add demo notice
• rework some webapp internals

[JulienVig]

Great work!! I'll review the implementation details next week.

I noticed a few UI things that I would change, like off centered buttons, small margins, I would also want to make the Demo warning a banner rather than a Card on the home page. If you want, I'm happy to tweak that myself next week (along with other things like the feedback form)

[martinjaggi]

for the async iter every batch vs every round: does it affect training speed or not much? (thinking of the cases where local iterations might be super fast but communication might be slow, which might often be the case)

[tharvik]

for the async iter every batch vs every round: does it affect training speed or not much? (thinking of the cases where local iterations might be super fast but communication might be slow, which might often be the case)

hum, not from what I remember. we didn't actively test with slow communications but it didn't seem like a high time cost in comparaison to the training (sub-seconds vs whole seconds). of course, if the network is very flaky, it might come as an issue.

[tharvik]

like off centered buttons

ho good catch, I mixed two tailwindcss classes, fixed in the new commits.

small margins, I would also want to make the Demo warning a banner rather than a Card on the home page. If you want, I'm happy to tweak that myself next week (along with other things like the feedback form)

gladly, web UI is not really my strongest suit :)

[JulienVig]

gladly, web UI is not really my strongest suit :)

It's not mine either but I unfortunately have strong opinions on the matter... If that's fine with you I'll make changes in a follow-up PR rather than this one

[JulienVig]

Great work!! Mostly minor comments but a few important ones:

• the preprocessing time measurement are now wrong
• the chart animations are jerky