OK guys, this is probably a piece of cake for most of you... but I'm puzzled.
I have an server with a 2 Mbit/s upload link to the internet. The modem is an Arris Touchstone CM450b (cablemodem).
When people download a file from my server with their internet explorer (through IIS, which is installed on my server), speeds are normal.
However, when IIS sends out a html page containing img tags pointing to graphics on the same server, those gifs and jpegs are send VERY slowly. Users see the pictures being drawn in chuncks on their screens.
Can this have something to do with packet sizes?? Has anyone seen this before? Please help me solve this puzzle!
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Try jpeg2000
http://stargate.ecn.purdue
Reps
>those gifs and jpegs are send VERY slowly
What size jepgs? (How big are files?)
Is it possible that the images need resized and optimized for browsing?
How To Optimize Any Image for the Web
http://www.pantos.org/atw/
You do realize, I hope that upload/download over cable is radically different speeds? Like upload can be 10x slower than download. Remember, web pages are small, images are big. Look at the IIS HTML directory, if the JPGs are 50X the size of the web pages, you have your answer.
The only reason sending of JPG files would be unusually slow is if you have something like an antivirus program (or some component of IIS) screening the JPG and other image files for viruses. You should also call the cable company to see if THEY are screening these files for viruses, which will make them slow.
scrathcyboy has a good point - local software on the server other than IIS (or even between your server and the typical client) may be causing delays due to the content type.
Also, I don't really keep up on all the latest exploits, but it might be possible that you have some sort of virus/malware that is attemping to actively infect image files served through your site as they are sent out (IIRC, there have been several IE image file exploits discovered over the years [WMF being the biggest fiasco]).
I have a good test for you - create a page that refers to the same file in two different ways - one with an image extension (.jpg or whatever) and one with a non-image extension (.txt or something). Do the download speeds differ?
Cheers,
-Jon
Business Accounts
Answer for Membership
by: r_naren22atyahooPosted on 2006-07-12 at 00:34:38ID: 17088452
not quite sure give us the site address if its on internet