Hi all,
first of all: yes I have read the FAQ. I know pdfbox is not thread safe.
I'm trying to render parts of a larger pdf to a BufferedImage. e.g.
pages 5, 7, 10, 52, 53
However this is quite slow: My initial timing measurements show that
opening a pdf takes about half a second and rendering a single page
takes 0.8 - 2.5 seconds (Laptop; i7). So rendering e.g. 5 pages is 0.5
+ 5 * 1.5 = 8 seconds. I'm using loadNonSeq and
RenderUtil.convertToImage(page). I've also tried to use
drawer.drawPage directly without creating BufferedImages for each
page, same result.
Again, I know pdfbox is not thread safe. But anyway I had an idea to
make it multi threaded: just open the document in each thread
separately! So at least in theory we get: 0.5 (5 times simultaneously)
+ 2.5 (slowest page) = 3 seconds total which would be less than half
the time required before.
I haven't tested this yet, but maybe someone has already done
something like this?
Regards,
Alex
