[xiljin]

Our rails app generates dozens of accounting related reports on the fly in HTML and we use Flying Saucer to generate a PDF version -

https://github.com/flyingsaucerproject/flyingsaucer

To help minimize request time, we keep Flying Saucer persisted with Nailgun -

https://github.com/martylamb/nailgun

For generating checks, IRS forms and other PDFs that involve precise formatting we use Prawn -

https://github.com/prawnpdf/prawn

[joshmarinacci]

Hey! Flying Saucer! I wrote the first version of that almost a decade ago. I'm so happy to see people are still using it.

[virtualwhys]

Use it on the JVM here, quite the god send, thanks for bringing it into being ;-)

We provide PDF reports generated from various stat pages on our site for NHL and college hockey scouts.

Performance is excellent, no caching required, and the implementation is seamless, just feed html directly to FS and voila, on-the-fly PDF reports.