public static void Fill(this IStorage input, byte value, long offset, long count, IProgressReport progress = null)
{
const int threshold = 0x400;
if (count > threshold)
{
input.FillLarge(value, offset, count, progress);
return;
}
Span <byte> buf = stackalloc byte[(int)count];
buf.Fill(value);
input.Write(buf, offset);
}