100719 - Same image loaded repeatedly, cache seems to be useless

Status: RESOLVED INVALID

(Core :: Graphics: ImageLib, defect)

Description

[(Don't use, old account) - Kai Engert]

The following is seen with both cache settings set to "automatically" and "once
per session". Make sure you don't use a proxy.

Go to the above URL. It shows a table with many small cells, showing repeatedly
the same images multiple times. At least 3-4 images in the middle in every row
reference the identical URL.

While the page loads, I see the small images appearing slowly, the are drawn for
each table line separately.

This happens so slowly, it makes me believe, the cache is not used.

I used a network sniffer tool, and I see that while each row of images is drawn,
another ~20 KB are transferred over port 80.

Expected behaviour:
- each image appearing on page is requested from the web server only once
- for each unique image on page, once it is loaded over the network, all its
appearances on the page should be drawn nearly simultaneously.

Comment 1

[Elmar Ludwig]

Duplicate of bug 78019?

If this happens on (shift-)reload only, this is probably a duplicate of bug 79020.

Comment 2

[(Don't use, old account) - Kai Engert]

I see this when I start a new session and load the page for the first time in
the session.

Comment 3

[Doron Rosenberg (IBM)]

what version of mozilla are you using? page loads soo fast, i can't see it.

Comment 4

[(Don't use, old account) - Kai Engert]

Okay, I found the problem. I see this problem only with one profile, and in the
prefs.js there is the following line hanging around.

  user_pref("browser.enable.cache", true);

No idea how this could end up there. If I remove the line, it works very fast as
expected. New created profiles don't have that line.

Marking invalid.

Comment 5

[(Don't use, old account) - Kai Engert]

err, this is the working line, when it was slow, the entry said "false".