the implementation with time.Ticker for me use stably under 20% CPU, i guess this is the best i can get without syscall or CGO magic
https://play.golang.org/p/Q5BMpr6zCEF interesting fact that for me time.Sleep was the least performant while github issue states the opposite Robert Engels <reng...@ix.netcom.com> ezt írta (időpont: 2018. dec. 20., Cs, 5:04): > Then something is broken on the implementation. 10x overhead does not seem > realistic. > > > On Dec 19, 2018, at 9:50 PM, Ian Lance Taylor <i...@golang.org> wrote: > > > >> On Wed, Dec 19, 2018 at 6:52 PM robert engels <reng...@ix.netcom.com> > wrote: > >> > >> I don’t think the analysis is correct in the issue cited. No one > mentions just using usleep() as the system call like a C program would, at > least for time.Sleep(), and block the calling thread. > > > > That doesn't scale to large numbers of goroutines. > > > > > >> For the timer based select, it is more difficult, and it seems the > timerfd is the best solution - but I would instead proposed a timer thread > - that manages all timers, and interacts with the scheduler as an external > event - that is it wakes up based on the earliest expiration timer. > > > > That's more or less how the runtime works today, although it doesn't > > use timerfd and there are up to 64 timer threads. > > > > Ian > > > > > >> On Dec 19, 2018, at 7:58 PM, djad...@gmail.com wrote: > >> > >> see https://github.com/golang/go/issues/27707 > >> > >> > >> -- > >> You received this message because you are subscribed to the Google > Groups "golang-nuts" group. > >> To unsubscribe from this group and stop receiving emails from it, send > an email to golang-nuts+unsubscr...@googlegroups.com. > >> For more options, visit https://groups.google.com/d/optout. > >> > >> > >> -- > >> You received this message because you are subscribed to the Google > Groups "golang-nuts" group. > >> To unsubscribe from this group and stop receiving emails from it, send > an email to golang-nuts+unsubscr...@googlegroups.com. > >> For more options, visit https://groups.google.com/d/optout. > > -- > You received this message because you are subscribed to the Google Groups > "golang-nuts" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to golang-nuts+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
