[FEA] [performace] [follow-up] investigate to handle DST timezones on GPU for year > 2200. #3674
Description
Is your feature request related to a problem? Please describe.
PR #3072 starts to support Daylight Saving Time (DST) timezones.
When there is year > 2200, it leverages CPU to compute, this may introduce performance issue, at least it's never faster than CPU because there is memory copy overhead from GPU to CPU before computing on CPU.
We may need to investigate is there a way to handle year > 2200 on GPU and get a better performance than CPU.
Describe the solution you'd like
Related comment, refer to link
One potential solution, but not sure it will get good perf:
- implement a method to get whether a day is sunday.
- Dynamically generate transitions for a given day.