`timeZone` causes bad performance due to slow re-renders

[mciudoiu]

Using timeZone significantly affects performance slowing down re-renders by up to 15x.
Having some disabled dates and modifiers additionally increases this time.

To reproduce

CodeSandbox: https://codesandbox.io/p/sandbox/daypicker-bug-report-forked-8lrc7t

Actual Behavior

Re-renders are very slow.

Expected Behavior

Be as fast as when not using timeZone.

[rodgobbi]

@mciudoiu Thanks for the detailed CodeSandbox!

I'll investigate it and try to improve it.

[FreddyStraub]

We have the same issue in out time application. Are there any performance improvements planned? 😊

[gpbl]

@FreddyStraub thanks for your feedback! I’ve tried to improve performance on this side, but haven’t had much luck. date-fns has good timezone support, but it also comes with some performance limitations.

Performance should improve significantly once we add a Temporal version of DayPicker.

[FreddyStraub]

Hi @gpbl thx for the info :)

Just checked out the Temporal version issue. Is it already known when that issue will be solved or V11 will be released?