W3C home > Mailing lists > Public > ietf-http-wg@w3.org > January to March 2013

Re: Header Stats

From: James M Snell <jasnell@gmail.com>
Date: Tue, 22 Jan 2013 20:33:50 -0800
Message-ID: <CABP7RbdYsjQELcnZseCz8x_uhqyoFcd1kQaAyA2VHvdBjZ_QKA@mail.gmail.com>
To: "ietf-http-wg@w3.org" <ietf-http-wg@w3.org>
Ok.. I have updated the calculations to show:

  1. General variability of header values. The lower the number, the more
redundant the value tends to be.
  2. A frequency distribution of specific values per header. This is rather
verbose but extremely informative
  3. For date and numeric header values, comparison values between the
text-value and optimized binary encoding value.
  4. A summation of the total bytes saved by using the optimized binary
encoding for dates and numeric headers.


  - Implement experimental Set-Cookie, Cookie and Cache-Control headers to
see the difference for binary encoding
  - Properly handle null-separated value lists

If there are other interesting calculations you'd like to see, let me

The updated output is here:

On Tue, Jan 22, 2013 at 1:24 PM, James M Snell <jasnell@gmail.com> wrote:

> I've started working on generating stats for individual headers within
> messages. Rather than take up too much space here on the list for the
> results, I am keeping the results in my github fork [1] of the
> compression-test code and will be posting summaries of the results
> periodically on my personal blog [2]. I will be putting together a summary
> of my findings together in time for the interim meeting next week.
> Unfortunately, however, I will not be able to attend the meeting.
> [1] https://github.com/jasnell/compression-test/blob/master/counts/
> [2] http://chmod777self.blogspot.com/2013/01/http-20-header-stats.html
> - James
Received on Wednesday, 23 January 2013 04:34:38 UTC

This archive was generated by hypermail 2.3.1 : Tuesday, 1 March 2016 11:11:09 UTC