I simply want to delete the memory allocated by Value too. When i checked memory with MemStats, its still same as when i added entries to map
On Monday, August 27, 2018 at 3:02:53 PM UTC+5:30, Hau Ma wrote: > > I think there is a major different: the memory allocated for key "index" > in hashmap, if you assign m[index] to nil, the allocated memory for hashed > key "index" still exist, when delete the allocated memory will be deleted > as well. Both will have same affect on the pointer to struct, it will be > collected by Garbage Collector > > > Vào Th 2, 27 thg 8, 2018 vào lúc 16:00 Kasun Vithanage < > alan...@gmail.com <javascript:>> đã viết: > >> I've a map which has set of keys and pointing to some structs like this. >> In here i allocate lot of entries and trying to delete them. But the memory >> usage is not shrinking. >> >> According to this issue <https://github.com/golang/go/issues/20135> it >> seems how go behave at this point. In there its suggested to create a new >> map and move all data there for reduced memory usage. But that seems not a >> better option as it >> is an expensive operation against such large map. >> >> What is the best way to delete a key from map freeing the memory occupied >> by the Value(a pointer in this case). >> >> type Person struct { >> Name string >> } >> >> func NewPerson(name string) *Person { >> return &Person{Name: name} >> } >> >> func main() { >> m := make(map[int]*Person) >> >> for i := 0; i < 1000000000; i++ { >> m[i] = NewPerson("Person" + strconv.Itoa(i)) >> } >> >> for index := 0; index < 10000; index++ { >> m[index] = nil >> delete(m, index) >> } >> } >> >> >> >> -- >> 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 <javascript:>. >> 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.
