Hi,
I wanted to speed up the image menu (and all other menus because they
show images, too). That's what I found out:
pygame is slow when reading png or jpg files. PIL is faster, but
transforming PIL images to pygame images is also slow. Right now, we
use png to store our thumbnails. For an example file, the cachefile
has the size of 70322 Bytes. Using jpg as cache is a little bit slower
(but not much), the size is 2827 Bytes. We could save disc space by
using jpg. But still, the speed is awful. But we could save the raw
image of the thumbnail using cPickle[1]. This size is now 216026
Bytes. It's about three times the size we use now, but it's much
faster, much?, no very much! In my test folder I needed about 5 secs
to enter with png or jpg, now it's only 1 sec and this sec is used by
the mmpython cache.
Question: how important is the usage of three times the space? I vote
for raw data.
Dischi
Footnotes:
[1] BTW, our use of cPickle is wrong. 1. we give cPickle open(..) as
argument ... noone closes this anywhere. 2. cPickle has an
optional argument TRUE/FALSE if cPickle should use binary
caching. This is a. faster and b. it uses less disc space. I
wrote util.read_pickle and util.save_pickle as wrapper. Please
use that.
--
C.O.B.O.L - Completely Obsolete Boring Old Language.
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