slicereader_fast.go
func (b *sliceReader) ReadInt() uint64 {
	return uint64(binary.LittleEndian.Uint32(b.Read(4)))
}
func (b *sliceReader) ReadInt() uint64 {
	return uint64(binary.LittleEndian.Uint32(b.Read(4)))
}
// Despite returning a uint64, this actually reads a uint32. All table indices
// and lengths are stored as uint32 values.