http-compression in low performance

Hi Steve

 

 

The request and response captured in F5 via tcpdump are exactly the same as shown in HttpFox at client browser.

 

Here is an example of request header, all include Accept_Encoding tag

 

Host: 4.pushauction.com

 

Connection: keep-alive

 

User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/535.11 (KHTML, like Gecko) Chrome/17.0.963.79 Safari/535.11 QIHU THEWORLD

 

Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8

 

Referer: http://4.pushauction.com/Listing/Listing.aspx?parentID=103&page=10&btn=hrefListOnline

 

Accept-Encoding: gzip,deflate,sdch

 

Accept-Language: zh-CN,zh;q=0.8

 

Accept-Charset: GBK,utf-8;q=0.7,*;q=0.3

 

Cookie: __utma=131059338.1972362686.1355392282.1355392282.1355392282.1; __utmz=131059338.1355392282.1.1.utmcsr=(direct)|utmccn=(direct)|utmcmd=(none); ASP.NET_SessionId=box1anmvqyav31sfstdpy2tc; Lang=en-us; cateid=; folderkey=

 

 

And only javascript / css got compressed in response, which include vary tag:

 

16:12:18.828781 IP (tos 0x0, ttl 255, id 49326, offset 0, flags [DF], proto: TCP (6), length: 40) 192.168.0.90.http > 112.90.90.17.ias-admind: ., cksum 0x96ed (correct), 1:1(0) ack 682 win 65535

 

....E..(..@.../....ZpZZ..P.](_.S....P.........

 

16:12:18.828781 IP (tos 0x0, ttl 255, id 49327, offset 0, flags [DF], proto: TCP (6), length: 1480) 192.168.0.90.http > 112.90.90.17.ias-admind: ., cksum 0x3e3b (correct), 1:1441(1440) ack 682 win 65535

 

....E.....@...*....ZpZZ..P.](_.S....P...>;..HTTP/1.1 200 OK

 

Date: Tue, 14 May 2013 08:12:18 GMT

 

Connection: Keep-Alive

 

Content-Type: text/css

 

Last-Modified: Wed, 09 Jan 2013 11:10:36 GMT

 

Accept-Ranges: bytes

 

ETag: "WA827ca453e86248d3"

 

Server: Microsoft-IIS/7.5

 

X-Powered-By: ASP.NET

 

Expires: Thu, 16 May 2013 04:51:04 GMT

 

Cache-Control: public, max-age=172800, s-maxage=14400

 

Age: 11749

 

Content-Length: 8852

 

X-WA-Info: [S10101.C100018.A12236.RA0.U1196752467].[OT/all.OG/includes]

 

Vary: Accept-Encoding

 

 

F5 just not to compress plain text like this:

 

Cache-Control: private

 

Content-Type: text/xml; charset=utf-8

 

Server: Microsoft-IIS/7.5

 

X-AspNet-Version: 4.0.30319

 

X-Powered-By: ASP.NET

 

Date: Tue, 14 May 2013 08:06:57 GMT

 

Content-Length: 11877

 

X-WA-Info: [S10203.C100018.A12164.RA0.U0].[OT/xml.OG/pages]

 

 

More samples:

 

Cache-Control: private

 

Content-Type: text/html; charset=utf-8

 

Server: Microsoft-IIS/7.5

 

X-AspNet-Version: 4.0.30319

 

X-Powered-By: ASP.NET

 

Date: Tue, 14 May 2013 08:06:59 GMT

 

Content-Length: 7352

 

X-WA-Info: [S10203.C100018.A12164.RA0.U0].[OT/html.OG/pages]

 

 

Everything settings in F5 is so straight forward. However, I just cannot make F5 compress these plain text!

 

 

Thanks!

 

 

Larry