if v == nil {
		s = make([]int64, 1<<b)
	} else {
		sp := v.(*[]int64)
		s = *sp
		*sp = nil
		c.hdrInt64Slice = append(c.hdrInt64Slice, sp)
	}
	s = s[:n]
	return s
}
func (c *Cache) freeInt64Slice(s []int64) {
	for i := range s {
		s[i] = 0
	}
	b := bits.Len(uint(cap(s)) - 1)
	var sp *[]int64
	if len(c.hdrInt64Slice) == 0 {
		sp = new([]int64)
	} else {
		sp = c.hdrInt64Slice[len(c.hdrInt64Slice)-1]