On 12 Apr 2008, at 13:09, Andreas Delmelle wrote:
On Apr 11, 2008, at 23:30, Peter Coppens wrote:
Hi Peter
I don't like the jai dependancy (don't like native Java libraries)
Very rightly so. As demonstrated by this particular case, if one
platform lacks native support, it seriously breaks the usability of
the library as a platform-independent way of handling images.
Maybe this will be better in Apple Java 6, but I can't test since
the DP is only available for 64-bit Intel Macs and I'm still on
PowerPC... :(
I did...and these are decoders that are available
BMP
bmp
jpg
JPG
wbmp
jpeg
png
PNG
JPEG
WBMP
GIF
gif
but Jeremias' patch would solve that. The 6x performance hit
is ....more troublesome :(
Does this performance hit here also increase with the number of
TIFFs you include (as you verified with Sun's pure Java
implementation),
yes it does...that was the point I was trying to make
or is the effect restricted to the first one?
No, it does not,.
If you include, say 6 different images, is there still a 6x
performance hit, or does it shrink?
Have not tried to be honest
The latter would ind1icate that the performance hit could actually
be a sign of good scalability (always think positive ;-)).
A performance /hit/ for very low numbers, which decreases, then once
a threshold is reached, translates itself into an actual
performance /benefit/ for the larger numbers (?)
An algorithm with linear behavior will perform better (sometimes /
much/ better) for only one execution, than one with logarithmic
behavior. The latter, OTOH, will very soon become your friend as the
number of executions starts to grow. Slower for a single execution
due to the added complexity, but this added complexity would
precisely have as its purpose to reduce the runtime for future
executions. Only if there are none, does this become pure overhead.
Yes thanks for the refreshment (I had my share of csc :) ).
Another thing you could try out: Is there a similar difference in
timing if the TIFF is included as an fo:external-graphic? That would
already allow to factor Batik out of the equation.
Yes indeed...that would be a good parameter to play with.
Cheers
Andreas
---------------------------------------------------------------------
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
---------------------------------------------------------------------
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
