> On 05 Jan 2016, at 22:09, robrez <resendez.j...@gmail.com> wrote: > > I was delighted to learn that fop 2.0 has been released (I live under a > rock). > > For some time now we've been manually breaking up our content into multiple > page-sequences -- many more than we would like to use. > > I saw that one long page-sequence still eats memory: > https://xmlgraphics.apache.org/fop/2.0/running.html#memory > > For years now, I've been using a less-than-ideal strategy to break my > content up into multiple page-sequences. I'm wondering if there is any hope > that we will be able to stop doing this at some point and let the pages > break naturally.
Not in the near future, I'm afraid... It would require a very thorough rework of the line- and page-breaking interaction. At any rate, barring forced page-breaks, what happens is that first ALL line breaks for the entire page-sequence are determined, and only then is control handed over to the page-breaking algorithm, which in turn computes the page-breaks based on the line-boxes. There have been lots of theories/ideas on improving that, but one thing is certain: it should start with making the basic line-breaking process interruptible. As long as that is not the case, it is virtually impossible to improve this. Roughly: if it is more or less a certainty that there are enough line-boxes to fill the current page, return control to the page-breaking algorithm, so that there is at least an opportunity to flush, and e.g. detect page-width changes much earlier. Right now, such changes are only detected after all the line-breaks have been computed once... If they occur, the line-breaking process is restarted as of the point where the page-break to a new page with different inline-progression-dimension occurred. In the end, that could very well mean that a set of hundreds of line-breaks are computed for nothing, just wasting memory and CPU cycles. Definitely not a trivial matter to resolve. KR Andreas --------------------------------------------------------------------- To unsubscribe, e-mail: fop-users-unsubscr...@xmlgraphics.apache.org For additional commands, e-mail: fop-users-h...@xmlgraphics.apache.org
