On Sat, May 18, 2019 at 6:01 AM Tong Sun <suntong...@gmail.com> wrote: > > On Saturday, May 18, 2019 at 1:52:43 AM UTC-4, Ian Lance Taylor wrote: >> >> On Fri, May 17, 2019 at 9:12 PM Tong Sun <sunto...@gmail.com> wrote: >> > >> > How efficient Go linker is in detecting unused things (e.g., functions) in >> > a package during build and remove them from the compiled binary? >> > >> > To extremely simplify the case, say >> > >> > - I have a package that contains 10 individual functions, and each of them >> > will compile to 10K in binary size. >> > - Then a program calls one single function from such package. >> > >> > Will the compiled binary executable be 10K more in size, because of >> > calling that one single function, or 100K more? >> > >> > I.e., will using a tiny portion of a big package cost me the whole big >> > package in compiled binary size, or only the tiny portion that I used? >> >> The linker will discard all unused functions and variables, but will >> not discard unused methods. > > > > Thanks, Ian > > So in other words, if a package A that I'm using is importing 10 other > packages, and as long as any of the packages' methods are used within package > A's methods, all related methods from those 10 other packages will be > compiled & included in the binary executable, right? > > E.g., if I'm using a package just for CLI processing, however if the package > is doing some funky processing in its methods that use packages of net, > net/http, net/url, all related methods from net, net/http, net/url will end > up within my binary executable, right?
The details matter, and of course methods are associated with specific types rather than packages, but, in the general case, yes, that can happen. Ian -- 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/CAOyqgcU8VTs750TurABx6Hs5saRL%2BRmgvmUQGGb91mv0CdrQRQ%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
