jeshualin

Release: 1.64 At date_time/local_time/local_date_time.hpp:199 we have: tz->dst_local_start_time(d.year()).date(), tz->dst_local_start_time(d.year()).time_of_day(), tz->dst_local_end_time(d.year()).date(), tz->dst_local_end_time(d.year()).time_of_day(), tz->dst_offset() We did some performance evaluation and found that caching d.year(), dst_local_start_time() and dst_local_end_time() improved performance substantially.