Trivial generic arena alocator for go

arena.go

package arena

func ArenaAlloc[T any](n int) <-chan *T {
	c := make(chan *T, n/2)

	go func() {
		for {
			s := make([]T, n)
			for k := range s {
				c <- &s[k]
			}
		}
	}()

	return c
}

usage_example.go

package arena

var intPtrMaker = ArenaAlloc[int](1024)
var arrMaker = ArenaAlloc[[8]int](1024)

func example() {
	intPtr := <-intPtrMaker
	slice := (<-arrMaker)[:0]

	_, _ = intPtr, slice
}