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    • Slow Image Galleries?

    Posted by td80 posts: 1

    I just installed TikiWiki 1.8.1 and have set it up on a test community site. Everything looks good and I've been happy with everything so far except that the images and thumbnails in the image galleries take FOREVER to load. I have the image galleries set to save to disk and it seems to be properly storing the image and the thumbnail in the directory i specified, but loading the gallery index can take up to a minute and loading images takes upwards of 20 seconds for a fairly small image (40k).

    Not sure if this is a common problem or there is another setting I should check to speed things up? When i click the files themselves outside the gallery (i.e. loading up the directory where its saving the actual image and thumbnail files in a browser) they load up quickly, but trying to view them in the gallery takes forever.

    I didnt see much in the forums about this problem so I figured I'd check to see what might cause the problem. Any suggestions would be greatly appreciated. Thanks!

    Reads: 1638


    Posted by Russ Wilde posts: 63 United Kingdom

    me too 😉
    Fix did speed up thumbnails loading although I remember 1.7 lolading them faster 😛


    Posted by Philippe Cloutier posts: 1001 Canada
    Hi tarka and Russ, thanks for commenting this but it would be better if you and others could comment on the bug tracker directly. At this state this is still relevant information.

    Posted by Damian Parker posts: 2881 United Kingdom

    I think a lot here is down to Server and Browser compatibility.

    I use Tiki now 1.8 for managing my large collection of Digital Photos close on 7000, and not really noticed any problems here.

    Server: Apache 2 on Fedora Core
    Client: Mozilla 1.6 on Fedora Core (diff computer tho)

    Damian


    Posted by eru posts: 21 Netherlands

    In 1.8.2 the problem still occurs.
    A fix suggested at SF bug page helped.

    my conf: Apache 2.0.49, php 4.3.4, RedHat9, FireFox 0.8


    Posted by eru posts: 21 Netherlands

    Gotcha!

    I think I just identified a problem.
    As in my other post, it is related to gzip compression.

    When we explicitly set Content-length header, we always give it a value of a source file. When compression is on, the content becomes smaller, hence browser probably waits for more data (which never arrives).

    Switching compression off helps just as well as removing related header from show_image.php


    Posted by Russ Wilde posts: 63 United Kingdom

    So then solution is to make the header function only called when compression is off? Or are we not able to test if compression is being used without tiki's say-so (outside the "use gzip compression" checkbox)?

    Should be easy right?


    Posted by eru posts: 21 Netherlands

    In fact, I would remove all 'Content-Length' headers from tiki-created pages.
    Reason is, the output can be compressed by php itself depending on various settings in php.ini.
    And I'm not sure if the zlib or gzip compression correctly modifies headers when it compresses data.
    Some PHP and HTTP expert could say probably more 😊


    Posted by kiilo posts: 22 Switzerland

    thx!

    my image gallery is much more fast now ...

    ... Then I looked at

    show_image.php. It didn't change much. But I found this
    line added by mose (revision 1.12) :
    header ("Content-length: ".$imagegallib->filesize);
    I didn't check filesize() yet, but I would be 95% sure

    that removing this line fixes (or improves the result) ...


    this does the job!
    i am using twiki 1.8RC3

    kiilo