Hacker Newsnew | past | comments | ask | show | jobs | submitlogin

I'd be worried about much more than 20ns. Someone email the ntp list not to long ago asking about getting nano-second resolution time, and one of the responses pointed out that light travels about a foot in a second. So do you want the time on this side of the room, or that side?


Printable nanosecond for reference: http://blog.jgc.org/2012/10/a-downloadable-nanosecond.html


Presumably you meant, "travels about a foot in a nanosecond." From Google, "the speed of light / (10^9) = 0.299792458 m / s" -> about one foot.


As explained by Grace Hopper: http://highscalability.com/blog/2012/3/1/grace-hopper-to-pro...


Light travels about 300000 km in a second. I think you meant nano-second.


A foot a second is off by several orders of magnitude. It's closer to 300 thousand km per second in vacuum, and around 200 thousand km per second in fiber.


He obviously means a foot in a nanosecond.


Whoops, meant nanosecond. Thanks.




Consider applying for YC's Fall 2026 batch! Applications are open till July 27.

Guidelines | FAQ | Lists | API | Security | Legal | Apply to YC | Contact

Search: