Re: Straw Poll: Restore Header Table and Static Table Indices

[Greg Wilkins <[e-mail]>]

On 21 October 2014 03:53, Willy Tarreau <[e-mail]> wrote:

> Anyone would please review and/or comment ?



Willy,

IF we are changing, then I'm fine with your approach IFF those that are
advocating bias to dynamic headers are also satisfied with it.

However, note that I think it needs to be considered together with a review
of the static table itself.  With your pattern we get :

   - 62 static 1 byte indexed fields - which are only useful if we have
   values for most of the first 62 entries in the static table - so we need to
   add as many valus as possible
   - For static name, literal value encodings, we only get 6 1 byte indexed
   fields, so we need to review the table order to ensure that the first 7
   static entries are most frequently used with dynamic values. Currently that
   is most definitely not the case.  Also consideration has to be given to the
   length of the 6 selected fields as if Date encodes to 2 byte index, then
   you may as well send it huffman encoded and save the 1 byte index for
   something like last-modified.

So currently I'm +0 on this, but if somebody proposed a well tuned static
table to match then I'd be +1

If those who are advocating dynamic header support don't dismiss this
approach, then I'll give a go at proposing such a tuned static table
tomorrow.

cheers



-- 
Greg Wilkins <[e-mail]>  @  Webtide - *an Intalio subsidiary*
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