My reader still hasn't been delivered so can't check this...

I've read that extremely long books can cause noticeable page-turn slowdowns (perhaps relating only to pdf files - not sure).

Here's my issue - I'd like to do series of books as one (like HarryT does) but am wondering whether there is a noticeable slowdown in performance/page turn speed with ebooks of more than 1000 pages...

1. lrs file using reader fonts
2. lrs file using embedded fonts
3. lrs file using embedded fonts and 4-6 cover photos...

What is the performance hit (if any) for these scenarios compared, say, to a 300 page ebook?

Are there reader agility issues? memory issues? (Have no idea how it works)

Thanks...

There's certainly no slowdown with long LRFs compared with short ones. I have read that embedded fonts cause severe slowdowns, but have no personal experience of this.

I've read a few eBooks over 1,000 pages, haven't noticed a difference between them and shorter books.

I think, like you said pitolee, that this issue is related to PDF files only, and it depends on which tools were used to generate the PDF (some generate more efficient PDF code than others).

PDF slowdown noticeable after ~200 pages, gets worse as you get further into the document. There seemes to be a 1000-page limit after which pages are blank (at least using my set of PDF tools).

LRF and RTF seem fine. Embedded-font LRF is about 2-3x slower.

PDF slowdown noticeable after ~200 pages, gets worse as you get further into the document. There seemes to be a 1000-page limit after which pages are blank (at least using my set of PDF tools).

LRF and RTF seem fine. Embedded-font LRF is about 2-3x slower.
dstampe, what tool did you use to convert your PDFs? For instance, with htmldoc, I notice the same performance problems as you described. When I use Adobe Acrobat, there seems to be no decrease in performance, even with books with more than 1000 pages.

i'm the only thing that slows down after a thousand pages

i'm the only thing that slows down after a thousand pages
*grin* :D

I see no noticeable slowdown reading 1200 page book in rtf format. Simple rtf. I have just set sans-sherif font size 12.

I've read a number of files in RTF & LRF both that were well above 2000 pages, with no noticeable slowdown. :shrug:

I have not had any problems with RTF, LRF, or PDF formats.

One of the LRF books had over 5,000 pages and had no speed problems at either the start or end.

I created a properly page-sized PDF of 1,800+ pages in Adobe Acrobat and had no slowdown. I repeated it in ABBYY PDF Transformer and again no speed problems.

All of these were done using internal memory.