- From: Ian B. Jacobs <ij@w3.org>
- Date: Wed, 08 Aug 2007 03:35:44 +0000
- To: "He, Shelly" <Shelly.He@genesys.com>
- Cc: site-comments@w3.org, chris@w3.org
- Message-Id: <1186544144.8044.36.camel@localhost>
On Wed, 2007-08-08 at 11:16 +0800, He, Shelly wrote: > Hi, guys in W3 Company, > > > > I am a Validation Engineer in Genesys. > > Yesterday I learned a document from your web sit. But I don’t > understand the meaning of the “eff” marked in yellow. > > Could you give me some explanations? Hello, I believe you are referring to this report (February 1997) http://www.w3.org/Talks/970210HTTP/all.htm I found a more recent version of the paper (June 1997) http://www.w3.org/Protocols/HTTP/Performance/Pipeline.html In the later version, the "eff" column is replaced by "%ov" where "%ov is the percentage of overhead bytes due to TCP/IP packet headers." From a quick glance: %ov = (1.0 - eff) * 100 I'm not sure (and am not one of the authors of the report), but it looks like they replaced "eff" with "%ov," which perhaps was more communicative. I'm cc'ing Chris Lilley, one of the authors of the papers. Hope that helps, _ Ian P.S. The reason I dug into this a bit is that I co-wrote a summary of the report many years ago: http://www.w3.org/Protocols/NL-PerfNote.html > Thank you very much! > > > > Jigsaw > - > High Bandwidth, Low Latency > > > > > > > > > First > time > retrival > > > Cache > validation > > > > > > Packets > > > bytes > > > time > > > eff. > > > Packets > > > bytes > > > time > > > eff. > > > > > > HTTP/1.0 > > > 455.2 > > > 187525.6 > > > 1.12 > > > 0.912 > > > 362.8 > > > 58993.0 > > > 0.76 > > > 0.803 > > > > > > HTTP/1.1 > > > 234.4 > > > 189938.0 > > > 1.32 > > > 0.953 > > > 88.4 > > > 16878.0 > > > 0.80 > > > 0.827 > > > > > > HTTP/1.1 Pipelined > > > 168.0 > > > 189646.0 > > > 0.69 > > > 0.966 > > > 27.6 > > > 16878.0 > > > 0.52 > > > 0.939 > > > > > > HTTP/1.1 Pipelined > and > compression > > > 140.4 > > > 158460.0 > > > 0.59 > > > 0.966 > > > 27.2 > > > 16873.0 > > > 0.47 > > > 0.939 > > > > > > > > Best Regards, > > Shelly > > ============================== > > Shelly He, Validation Engineer, > > Department: Systems Engineering Testing, > > Company: Genesys Conferencing, > > Address: 333 North Chengdu Road, > > 1902-1905 Suite, Shanghai, 200040, > > Phone: +86 21 6135 2246 > > Mobile: +86 139 1626 8060 > > shelly.he@genesys.com > > www.genesys.com > > > > > > -- Ian Jacobs (ij@w3.org) http://www.w3.org/People/Jacobs Tel: +1 718 260-9447
Received on Wednesday, 8 August 2007 03:35:49 UTC