Large pdf opening

[allovertheglobe]

Originally Posted by pthwaite

Success
96Mb pdf opened in 25s to first page, thereafter pages open between 1 - 10s. Quite why the difference I don't know, some quick others slow.

In suspect my problem file must be the way it was saved. I've re-saved it and it is now 11Mb so we'll see what happens tomorrow

I think it's not the PDF filesize per se that is the issue, but rather the -contents-.

It seems the one you just tried for David is one of the rare ones that are very large, but still mostly consist of text.

Most of the large ones I've come across (newspapers, magazines, illustrated manuals etc.) are large mostly due to the included graphics (bitmap or vector) These need to rendered out before being displayed, using a sizable amount of -memory- (whether it's one large one or several small ones that need to be displayed on the same page) and of course corresponding -CPU usage-.

(I've had the reader run out of memory zooming in to a single very large image...)

[davidspitzer]

I wonder if one of the 2 gig 20mb/s 133x sd cards would have any appreciable affect on the load and page turn times?

[davidspitzer]

I think it could make a difference...

461 meg PDF copied to the sd card via my MAC and then back to the hardrive


Standard Sandisk SD card (Non SDHC)
1:26 write
0:45 read

PNY Optima Pro SD 20gb/s 133x (Non SDHC)
0:34 write
0:23 read

the write was ~3 times as fast and the read was ~2 times as fast

[allovertheglobe]

Originally Posted by davidspitzer

I think it could make a difference...
461 meg PDF copied to the sd card via my MAC and then back to the hardrive
Standard Sandisk SD card (Non SDHC)
1:26 write
0:45 read
PNY Optima Pro SD 20gb/s 133x (Non SDHC)
0:34 write
0:23 read
the write was ~3 times as fast and the read was ~2 times as fast

Well, the controller in the DR1000 might not be able to leverage that. I'm quite familiar with this issue when it comes to digital cameras: For some it makes a big difference, others simply cannot take advantage of it because they lack the processing power or controller chip.

(BTW.: I got your message and replied to it, but now I simply can't back to that part of my control panel?! It's not in my Inbox of Private Messages. Anyhoo, if the reply didn't work either: just go ahead.)

[Savonarola]

I'm having no problem opening anything, up to 80Mb so far - but what is true is that turning pages in anything over a few Mb is noticeably slower than with the iLiad (and forces that annoying 'please wait a moment' screen).

[tribble]

The DR is very slow with PDFs from google for example. They have large JPG2000 encoded images in the files and that take quite some computatioon to render those (20 to 30 seconds per page). I have had large PDF files 100+ MB with plain jpg images embedded, that where opening without any hassle.

[allovertheglobe]

OK, before going to bed: David, I took you up on your offer to download one of the large PDFs & try it on the DR1000.

However, and I hope this is not causing you too much trouble, I went with the 175mb one since we already established here that the one you asked about works fine.

So: the reader can handle a 175mb PDF file! That's larger than the built-in memory (128mb)!

It took quite a while to load it initially (a couple of minutes), but after that I was able to flip to any of the 1250 small print pages in under 10s. Straight ahead reading, after some caching, was nearly instantaneous. I was even able to zoom in at 200%. At first I got an out of memory error, but then it displayed the next page anyway. Panning was slow... obviously. More importantly for you, I think, is the ability to search in such a text: that works too, albeit rather slowly!

All in all, I'm quite impressed. But it also proves once again that the size of the PDF itself does not play nearly as big role on how it performs than the contents itself, esp. graphics.

I'll get rid of it as soon as there no other questions, it's not my idea of light reading anyway

[Over]

Originally Posted by tribble

The DR is very slow with PDFs from google for example. They have large JPG2000 encoded images in the files and that take quite some computatioon to render those (20 to 30 seconds per page). I have had large PDF files 100+ MB with plain jpg images embedded, that where opening without any hassle.

Will you make that review video you talked about a couple of weeks ago?

[BKeeper]

Well, my DR is definitely having trouble rendering complex pdf files.
Your intuition is right it's not so much about document size, it's about complexity. Combining layers of text, vector and bitmap elements are lethal.

The buffering algorithm needs to be unproved: e.g. with a 25 MB pdf my DR needs 30s+ just to render some pages (remember that's with the CPU at full speed...), and more often than not it will just hang, requiring a reset.

I suppose the good news is that it can be fixed. Let's hope it's done sooner rather than later.

[davidspitzer]

At least for my application that is a big relief. I am optimistic that irex will be able to enhance the operation in short order to fix the really big bugs, although I know it can be infuriating in the interim. At least you got one to play with! . right now irex is the only game in town for a4 and 8.5x11 reading. I wish it was more fully baked, but I am also glad to see it on the market. I have seen a lot of vaporware announcements by other companies; at the very least it will hopefully get them off the dime too.

I ordered mine on the 9th from ereaderoutfiters and it is now on perma-backorder.

[allovertheglobe]

Originally Posted by davidspitzer

At least for my application that is a big relief. I am optimistic that irex will be able to enhance the operation in short order to fix the really big bugs, although I know it can be infuriating in the interim. At least you got one to play with! . right now irex is the only game in town for a4 and 8.5x11 reading. I wish it was more fully baked, but I am also glad to see it on the market. I have seen a lot of vaporware announcements by other companies; at the very least it will hopefully get them off the dime too.

I ordered mine on the 9th from ereaderoutfiters and it is now on perma-backorder.

Yes, it's indeed the only game in town for now when it comes to large size electronic readers. And now that we are (well, at least I am) over the initial playing/testing phase and associated posting, I have to say I find it quite usable as is, warts and all. Yesterday I got ~7 hours of use out of it, so it seems to be true that the battery life improves after a few charge/discharge conditioning cycles. I really like it, for graphics (my main interest) nothing else comes close.

I'd never have thought about trying to read large-sheet newspapers on such a device (a rather challenging type of PDF actually) But on the reader I can zoom in to a readable size and pan around. Sure it's a bit sluggish, but if you actually take the time to READ rather than skim/test, it's not that bad. I can even do the crosswords and sudoku

And improvements will come, as the Iliad proved (even if not everything will get done).

I hope you'll get yours soon, and can test that 460mb whopper I saw in your folder for yourself