Comments on: IIPImage: Ajax-based Ultra High Resolution Image Viewer

By: Ruven

Ruven — Mon, 04 Jun 2007 19:35:01 +0000

OK, I’ve increased the tile size to 256×256 pixels, which will reduce the number of connections necessary by a factor of 4.

And I’ve offloaded some of the server workload via some internal load-balancing, so the whole thing should be a lot faster now :-)

By: Scott Schiller

Scott Schiller — Mon, 04 Jun 2007 17:58:47 +0000

I might try using larger (512×512?) tiles, which should help to lower the number of requests. I didn’t check, but it’d be even cooler if tile size is a user-configurable thing. ;) Rotating through server names may help with parallel downloads as well.

By: Jester

Jester — Mon, 04 Jun 2007 15:09:52 +0000

very nice work m8, hoping to see alot more like this in the future

By: Angad

Angad — Mon, 04 Jun 2007 14:48:38 +0000

and its slow ppl bcoz of the server being slow not the script! :)

By: Ruven

Ruven — Mon, 04 Jun 2007 14:46:13 +0000

Glad most of you like it :-D

Sorry about the slowness at the moment. The sudden surge in hits caused by this article has slowed my poor little server :-(

Using tiles is usually a good way to optimize the use of browser cache and minimize bandwidth (Google maps is also tile based), but, yes, it can result in a lot of hits. The old marble earth demo, though, transfers a single image per request.

Hey, I kinda like that GIF :-P

Which version of FF are you using BillyG and on which OS? If anyone else has had any problems, please post them to the project forum!

By: Angad

Angad — Mon, 04 Jun 2007 14:45:27 +0000

Isn’t this the same concept used in google maps?

By: jdalton

jdalton — Mon, 04 Jun 2007 14:35:59 +0000

I think the correct way to handle the large number of image requests is with sub-domains like img1.yoursite.com, img2.yoursite.com and img3.yoursite.com. I am glad the work got published 8).

By: JSerror

JSerror — Mon, 04 Jun 2007 14:34:36 +0000

Does it use the image_subdomain_trick? maybe it speeds the thing up a bit -> http://www.ajaxperformance.com/2006/12/18/circumventing-browser-connection-limits-for-fun-and-profit/

By: stu

stu — Mon, 04 Jun 2007 14:00:29 +0000

Great, this is very nice.

But I wanna do it offline! ;)

By: kenji

kenji — Mon, 04 Jun 2007 13:59:55 +0000

too slow. :-(

By: BillyG

BillyG — Mon, 04 Jun 2007 13:47:42 +0000

Maybe it’s just my FF, but all I got was some tiles flashed at me in the opened window and then blankness (for the first two supplied demo images).

Cool idea though.

By: Paolo M.

Paolo M. — Mon, 04 Jun 2007 13:32:10 +0000

It looks great, but panning around the image is quite quick so why does it take so long to load the initial screen?

By: uriel katz

uriel katz — Mon, 04 Jun 2007 13:14:48 +0000

really really nice!
but why you download the images in little squares? it take alot of time coz there so many requests,it will be better if the server could merge them into one picture and the client will just add it to the big picture

By: Alex

Alex — Mon, 04 Jun 2007 13:14:48 +0000

nice but very slow !

By: Stephan

Stephan — Mon, 04 Jun 2007 13:09:57 +0000

…Louvre! ;-) I like it.

Well done, although the indicator-GIF looks crappy ;-)