Or have the server adapt based on page size. Even if starting with 10 packets at a time is optimal when sending an arbitrarily large payload, it's probably not

Or have the server adapt based on page size. Even if starting with 10 packets at a time is optimal when sending an arbitrarily large payload, it's probably not optimal for an 11-packet payload - just send the whole thing at once. I don't know enough about web servers to know why the good ones don't already do this. I suppose it may be reading data from a stream where it doesn't know the size up front.