当年在做go时,很羡慕它的时间有微秒,纳秒,在做性能优化时,能很小颗粒度的查看引入方法执行的时间,当时.net的DateTime只有毫秒(虽然也有别的办法获取)。现在,在最新的.NET7 Preview4中,DateTime也有微秒和纳秒了,倍感亲切。
纳秒在百位上,没有十位和个位,但这也说明.NET在进化,向高性能进化,在乎微秒和百位纳秒了(哈哈)。
下面是引入这两个时间单位的实现:
namespace System { public struct DateTime { public DateTime(int year, int month, int day, int hour, int minute, int second, int millisecond, int microsecond); public DateTime(int year, int month, int day, int hour, int minute, int second, int millisecond, int microsecond, System.DateTimeKind kind); public DateTime(int year, int month, int day, int hour, int minute, int second, int millisecond, int microsecond, System.Globalization.Calendar calendar); public int Microsecond { get; } public int Nanosecond { get; } public DateTime AddMicroseconds(double value); } public struct DateTimeOffset { public DateTimeOffset(int year, int month, int day, int hour, int minute, int second, int millisecond, int microsecond, System.TimeSpan offset); public DateTimeOffset(int year, int month, int day, int hour, int minute, int second, int millisecond, int microsecond, System.TimeSpan offset, System.Globalization.Calendar calendar); public int Microsecond { get; } public int Nanosecond { get; } public DateTimeOffset AddMicroseconds(double microseconds); } public struct TimeSpan { public const long TicksPerMicrosecond = 10L; public const long NanosecondsPerTick = 100L; public TimeSpan(int days, int hours, int minutes, int seconds, int milliseconds, int microseconds); public int Microseconds { get; } public int Nanoseconds { get; } public double TotalMicroseconds { get; } public double TotalNanoseconds { get; } public static TimeSpan FromMicroseconds(double microseconds); } public struct TimeOnly { public TimeOnly(int day, int hour, int minute, int second, int millisecond, int microsecond); public int Microsecond { get; } public int Nanosecond { get; }想要更快更方便的了解相关知识,可以关注微信公众号
![](/i/l/?n=23&i=blog/1101861/202212/1101861-20221205204657243-1535433482.png)
标签:millisecond,细致,get,int,DateTime,时间,NET7,public,day From: https://www.cnblogs.com/ljknlb/p/16953493.html