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kotlinlang

Hey, quick question.

I’m working on the `DatePicker` and we use `java.util.Calendar` in a few date helper functions. These helpers can get called a lot while creating the calendar days, so I was looking at whether it makes sense to reuse the "Calendar" instead of creating a new one each time.

Since `Calendar` is mutable, I don’t want to use one shared instance. I was thinking about `ThreadLocal&lt;Calendar&gt;` instead.

Does anyone have a recommendation for this in Compose? Is `ThreadLocal` reasonable here, or would you keep creating a new `Calendar` unless we see an actual performance issue?

&gt; Is `ThreadLocal` reasonable here,
IMHO, no. `ThreadLocal` != "coroutine local".

&gt; would you keep creating a new `Calendar` unless we see an actual performance issue?
`Calendar` ought to be very cheap to instantiate. Don't create a million instances in a tight loop. Otherwise I would not worry about it unless you see a concrete performance issue.

Yeah, makes sense. I’ll leave it as it is for now and only look at changing it if we actually see a performance issue. Thanks for the point about `ThreadLocal` as well.