Hovering dates in datepicker is very slow about formkit HOT 4 CLOSED

I was using my notebook (~5 year old, rather low-performance Intel Core i7-7500U) when creating this issue. Now back on my PC (much more performant AMD Ryzen 9 7950X) the same example renders at around 40ms for the mouseenter event. However a 4x CPU slowdown (to get to more "average" CPU levels) again results in quite a lag and >100ms for the event.

On both my notebook and PC I'm using Manjaro Linux (running 6.9.0-1) and version 124.0.6367.155 of chromium.
In my local setup I'm using the latest FormKit versions (1.6.3 and 0.125.8 for pro), I assume the same versions as in the playground.

I can also confirm that the example you posted with the value-format prop has quite the lag, even without CPU throttling. The mouseenter event takes about 130ms. And with 4x CPU slowdown it's 600ms 😅

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I do see a performance hit when using the value-format prop and having a value applied:

https://formkit.link/49d30a3d2b8049386969bec88e0b41b9

However I don’t see the same performance issue in the example you posted. Either way we need to address this, but are you still seeing the issue in your posted example: https://formkit.link/fe4ec94aa80661e9281fea631334bd90

Maybe some screen captures and more environment details would be helpful too such as the OS and version of formkit and formkit pro.

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@dulnan Hey there! We took a look at this issue. Our initial benchmarks for performance at 6x CPU throttle when hovering over the day cells was ~72ms and ~185ms with the value-format prop assigned. At FormKit Pro v0.126.5, these numbers are now both down to around ~22ms. Let us know if you're seeing this improvement as well after updating.

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@dulnan Hey, I'm actually going to close this for now. Let me know if you are still having significant latency issues.

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