It is not rare a function will use 10M+ stack. On Thursday, July 1, 2021 at 4:13:40 AM UTC-4 Volker Dobler wrote:
> Note that the compiler should generate efficient code for > common, typical, real-world code. Optimising the compiler > to generate the most efficient code for pathological code > can be a waste of time, both for the compiler writers and > for the users waiting longer for their "normal" code to be > compiled. Nevertheless the compiler should emit "decent" > code for pathological cases. The quadratic stack growth > seems decent to me. > > V. > > On Thursday, 1 July 2021 at 03:03:37 UTC+2 tapi...@gmail.com wrote: > >> On Wednesday, June 30, 2021 at 8:46:19 PM UTC-4 axel.wa...@googlemail.com >> wrote: >> >>> On Thu, Jul 1, 2021 at 2:34 AM tapi...@gmail.com <tapi...@gmail.com> >>> wrote: >>> >>>> >>>> >>>> On Wednesday, June 30, 2021 at 11:56:45 AM UTC-4 Brian Candler wrote: >>>> >>>>> So I think what you're asking is, "under what scenario does the code >>>>> in L1066-1069 >>>>> <https://github.com/golang/go/blob/d19a53338fa6272b4fe9c39d66812a79e1464cd2/src/runtime/stack.go#L1065-L1070> >>>>> >>>>> get run?" - is that right? >>>> >>>> >>>> Almost true. >>>> >>>> Whether or not it should run, growing the stack from 2048 to 512M in >>>> 18+ steps looks not right. >>>> >>> >>> Why? 2048 • 2^18 = 2^11 • 2^18 = 2^29 = 536870912. >>> Seems like exactly the expected result. >>> >> >> It looks each step calls copystack once. >> Isn't one step more efficient? >> >> >>> >>> >>>> >>>> >>>>> >>>>> On Wednesday, 30 June 2021 at 14:21:21 UTC+1 tapi...@gmail.com wrote: >>>>> >>>>>> Sorry, I post the wrong anchor. It is line 1068: >>>>>> https://github.com/golang/go/blob/d19a53338fa6272b4fe9c39d66812a79e1464cd2/src/runtime/stack.go#L1068 >>>>>> >>>>>> On Wednesday, June 30, 2021 at 5:08:30 AM UTC-4 Brian Candler wrote: >>>>>> >>>>>>> On Wednesday, 30 June 2021 at 08:25:59 UTC+1 tapi...@gmail.com >>>>>>> wrote: >>>>>>> >>>>>>>> >>>>>>>> It looks this line >>>>>>>> https://github.com/golang/go/blob/master/src/runtime/stack.go#L1078 >>>>>>>> never gets executed. >>>>>>>> >>>>>>>> >>>>>>> Can you quote the line you're referring to? Line numbers can shift >>>>>>> up and down as commits are made to the master branch. Right now, L1078 >>>>>>> is a >>>>>>> blank line. >>>>>>> >>>>>> -- >>>> >>> 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...@googlegroups.com. >>>> >>> To view this discussion on the web visit >>>> https://groups.google.com/d/msgid/golang-nuts/5fab5a6e-5dd5-4df2-8b31-4a51aa825f92n%40googlegroups.com >>>> >>>> <https://groups.google.com/d/msgid/golang-nuts/5fab5a6e-5dd5-4df2-8b31-4a51aa825f92n%40googlegroups.com?utm_medium=email&utm_source=footer> >>>> . >>>> >>> -- 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. To view this discussion on the web visit https://groups.google.com/d/msgid/golang-nuts/9e869b98-f3e0-4bfd-8a24-56c9a8dea8a4n%40googlegroups.com.
