runtime.ReadMemStats(s0)
	if _, err := Decode(buf); err != nil {
		t.Fatal("Decode:", err)
	}
	runtime.ReadMemStats(s1)
	if heapDiff := int64(s1.HeapAlloc - s0.HeapAlloc); heapDiff > 30<<20 {
		t.Fatalf("Decode of %d frames increased heap by %dMB", frames, heapDiff>>20)
	}
}

func BenchmarkDecode(b *testing.B) {
	data, err := os.ReadFile("../testdata/video-001.gif")
	if err != nil {
		b.Fatal(err)

// Init is idempotent with respect to the heap invariants
// and may be called whenever the heap invariants may have been invalidated.
// The complexity is O(n) where n = h.Len().
func Init(h Interface) {
	// heapify
	n := h.Len()
	for i := n/2 - 1; i >= 0; i-- {
		down(h, i, n)
	}
}

// Push pushes the element x onto the heap.
// The complexity is O(log n) where n = h.Len().
func Push(h Interface, x any) {
	h.Push(x)