On Thu, Feb 27, 2025 at 5:56 PM Amnon <amno...@gmail.com> wrote: > Go nearly had Arenas a few years ago. And I think they are still used in > Google. > But they were pulled because the polluted the API's of too many libraries. > See https://github.com/golang/go/issues/51317 > On Thursday, 27 February 2025 at 07:55:27 UTC will....@gmail.com wrote: > >> I recently recalled that someone in the Go Team—I forget who—said that >> the Go compiler slowed down a lot after converting from C to Go because the >> Go GC was freeing a lot of memory that the C code wasn't. >> >> I wonder if an approach like that of memory regions ( >> https://github.com/golang/go/discussions/70257) could be used to hint to >> the GC that memory allocated in a function doesn't need to be freed unless >> there is severe memory pressure. >> > GOMEMLIMIT (https://go.dev/doc/gc-guide#Memory_limit) applies this idea to all allocations. (GC doesn't need to run if there is lots of headroom).
I'm not sure I understand the rationale for targeting specific functions? If the allocations are unreachable, why does it matter whether they came from a DeferCollection function or not? If you want a cache that might be cleared under memory pressure (like sync.Pool), that is something that is now possible to build with the weak package (https://pkg.go.dev/weak). > >> For example (for lack of a better name): >> >> func main() { >> runtime.DeferCollection(func() { >> runCommand() >> }) >> } >> >> Will >> > -- > 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 visit > https://groups.google.com/d/msgid/golang-nuts/2ebe77c1-7d62-4e5f-b300-1165e99cd477n%40googlegroups.com > <https://groups.google.com/d/msgid/golang-nuts/2ebe77c1-7d62-4e5f-b300-1165e99cd477n%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 visit https://groups.google.com/d/msgid/golang-nuts/CALoThU_1qcONrXA_%3DDK11RBvJqEez6BMHKOZEBXtexmrbXXdpQ%40mail.gmail.com.
