[Poppler-bugs] [Bug 28225] very slow rendering

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=28225

--- Comment #9 from thomasf <Thomas.Freitag at alfa.de> 2012-05-14 06:16:11 PDT ---
(In reply to comment #8)
> I get 3seconds per page in my laptop, but to be honest seems a bit too much for
> a "simple" page as that (text and some small images) i'd be interested in
> knowing why it's so slow

It's not just so "simple" You think: all the yellow symbols are images with a
resolution of 4924.5 ppi, and because we don't cache xobjects, we read i.e. on
page 1 70 images with such a resolution. This takes some time, even if the
images are all jpeg compressed, so one of the compressions which can be really
read quickly.
Of course it would be quite easy to implement a caching for images. If we would
do it, we would read i.e. the Euro sign on the first page only once instead of
8 times. But the next PDF producer probably even doesn't recognize that is is
always the same sign and would insert 8 images instead of one, and then even a
cache will not help anyway.
Therefore I think that 3 seconds per page is acceptable for something like
this.

-- 
Configure bugmail: https://bugs.freedesktop.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug.