// have a greater chance of finding adjacent ones.
// size class 19: 320 byte objects, 25 per page, 1 page alloc at a time
const objsize = 320

type objtype [objsize]byte

func adjChunks() (*objtype, *objtype) {
	var s []*objtype

	for {
		c := new(objtype)
		for _, d := range s {
			if uintptr(unsafe.Pointer(c))+unsafe.Sizeof(*c) == uintptr(unsafe.Pointer(d)) {
				return c, d
			}