On Wed, 2008-08-06 at 23:41 +0200, Dirk Meyer wrote:
> The grid is a special case where it would not matter if the images are
> loaded by a thread and they pop up after each other. But in normal
> operation I want to see an image _now_.
At least for the actual UI (menus and such), any such images can be
preloaded, at startup or something, since we'll know what images are in
use based on the theme.
> Isn't texture_new_from_pixbuf a clutter 0.6 feature dropped in 0.8?
Oh, indeed it is. I wonder why they did that. I suppose it isn't
strictly needed, but it's a nice convenience.
> I will try to replace the imlib2 code with pixbuf and we will see. But
> it is late now, I will do this tomorrow.
Don't bother. I ran the test and imlib2 is faster, but only by a slim
margin (like 7%). See attached benchmark.
> But this is only a stupid performance test, loading 320 images at once
> and creating 1300 candy _and_ clutter objects isn't daily use. I just
> wanted to test if kaa.candy scales to avoid the problems we had with
> kaa.canvas and the tv guide grid taking too much time.
It's nice to know these sorts of performance characteristics, yeah. So
what do you think, will the tv guide be a problem?
import gtk, clutter
import kaa, kaa.imlib2
import time, os, glob
files = glob.glob(os.path.expanduser('~/.thumbnails/large/*'))[:500]
print 'Warming cache ...'
[ file(f).read() for f in files ]
t0 = time.time()
for f in files:
tex = clutter.Texture()
img = kaa.imlib2.open(f)
tex.set_from_rgb_data(img.get_raw_data(), True, img.width, img.height,
1, 4, clutter.TEXTURE_RGB_FLAG_BGR)
dur = time.time() - t0
print "imlib2 method took %f (%f each)" % (dur, dur / len(files))
t0 = time.time()
for f in files:
tex = clutter.Texture()
pb = gtk.gdk.pixbuf_new_from_file(f)
tex.set_from_rgb_data(pb.get_pixels(), True, pb.get_width(), pb.get_height(), 1, 4, 0)
dur = time.time() - t0
print "gdkpixbuf method took %f (%f each)" % (dur, dur / len(files))
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