Re: Delta Compression and UTF-8 Header Values

[Roberto Peon <[e-mail]>]

Agreed.
-=R


On Tue, Feb 12, 2013 at 3:41 PM, James Cloos <[e-mail]> wrote:

> >>>>> "RP" == Roberto Peon <[e-mail]> writes:
>
> RP> The header names are almost completely handled with the pre-seeded
> RP> dictionary, so they really don't affect the character frequency
> RP> count and/or thus the huffman encoding.
>
> RP> Arithmetic coding gets better compression ratios, at the expense of
> RP> gobs of CPU and complexity. I don't think that is a good tradeoff :/
>
> It is sometimes hard to guess whether huffman is chosen due to inertia,
> arithmetic patent agnst, or good technical reasons.  It is good to know
> that in this case it is the latter.
>
> I may not have expressed my primary point quite well enough though:
>
> Although I doubt that right now there is any text in the headers which
> is both common enough to warrent inclusion in a static table and not
> seven-bit clean, my point was that even if such text shows up over time,
> the fact that it is not seven-bit should not prevent its inclusion in
> future, extended versions of the static table.  As such specifying that
> text is defined to be utf-8 and the use of a static huffman table should
> not contra-indicate each other.
>
> -JimC
> --
> James Cloos <[e-mail]>         OpenPGP: 1024D/ED7DAEA6
>