Viewer takes ages to load books

GertNL01 · 01-19-2021, 02:44 PM

When looking for a book to read, I used to open book after book, reading a few lines, checking the index, etc.
After version 3.48 that is no longer possible. The least I can call it is annoying, because it always takes up to 10 seconds or more to load a new book.
Also when editing, I often save the changes, open the book, and check the changes made. When that takes more than say 2 seconds, it is irritating.

Is it possible to download and use the previous viewer somewhere, without de-installing the current installation?

theducks · 01-19-2021, 04:07 PM

Install that 3.xx PORTABLE on a thumb drive. (you can only install 1 version of Calibre on your PC)
Or install a 3rd party viewer and remove (preferences; behavior)the tick for the format under Use Internal Viewer

PeterT · 01-19-2021, 07:36 PM

Quote:

Originally Posted by theducks

Install that 3.xx PORTABLE on a thumb drive. (you can only install 1 version of Calibre on your PC)

I've got multiple installs on my windows PC with no issues; 32 and 64 bit plus different versions of portable.

SandFish · 01-21-2021, 05:56 AM

Quote:

Originally Posted by GertNL01

When looking for a book to read, I used to open book after book, reading a few lines, checking the index, etc.
After version 3.48 that is no longer possible. The least I can call it is annoying, because it always takes up to 10 seconds or more to load a new book.
Also when editing, I often save the changes, open the book, and check the changes made. When that takes more than say 2 seconds, it is irritating.

Is it possible to download and use the previous viewer somewhere, without de-installing the current installation?

I absolutely agree with you!!
First of all, the contents are present but -- if you jump on it to, say, have quick look at the copyright, the process brakes down with an error message.
Not nice!

retiredbiker · 01-21-2021, 02:49 PM

The Calibre viewer does a lot of caching as it opens books. After opening several hundred books, it gets very slow. I've found if I delete the cache it speeds right back up again. (The cache is at ~/home/.cache/calibre/ev2/ on my Ubuntu box.)

JSWolf · 01-21-2021, 04:18 PM

Calibre 3.48 may no longer work if the database is in the new Calibre 5 format. So if you've used Calibre 5, forget Calibre 3.48 and just learn to deal with the wait time for the eBook to open.

Sirtel · 01-21-2021, 05:07 PM

Quote:

Originally Posted by JSWolf

Calibre 3.48 may no longer work if the database is in the new Calibre 5 format. So if you've used Calibre 5, forget Calibre 3.48 and just learn to deal with the wait time for the eBook to open.

The viewer works just fine. I use the viewer of 3.48 for the same reason as the OP would. I have no time to wait when checking 100 or more books in quick succession.

The library database is not associated with 3.48. Only the viewer gets used.

01-19-2021, 02:44 PM	#1
GertNL01 Junior Member Posts: 1 Karma: 10 Join Date: Feb 2014 Device: Sony PRS-T2	Viewer takes ages to load books When looking for a book to read, I used to open book after book, reading a few lines, checking the index, etc. After version 3.48 that is no longer possible. The least I can call it is annoying, because it always takes up to 10 seconds or more to load a new book. Also when editing, I often save the changes, open the book, and check the changes made. When that takes more than say 2 seconds, it is irritating. Is it possible to download and use the previous viewer somewhere, without de-installing the current installation?

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01-19-2021, 04:07 PM	#2
theducks Well trained by Cats Posts: 30,443 Karma: 58055868 Join Date: Aug 2009 Location: The Central Coast of California Device: Kobo Libra2,Kobo Aura2v1, K4NT(Fixed: New Bat.), Galaxy Tab A	Install that 3.xx PORTABLE on a thumb drive. (you can only install 1 version of Calibre on your PC) Or install a 3rd party viewer and remove (preferences; behavior)the tick for the format under Use Internal Viewer

01-21-2021, 02:49 PM	#5
retiredbiker Evangelist Posts: 420 Karma: 2737916 Join Date: May 2013 Location: Ontario, Canada Device: Kindle KB, Oasis, Pop_Os!, Jutoh, Kobo Forma	The Calibre viewer does a lot of caching as it opens books. After opening several hundred books, it gets very slow. I've found if I delete the cache it speeds right back up again. (The cache is at ~/home/.cache/calibre/ev2/ on my Ubuntu box.)

01-21-2021, 04:18 PM	#6
JSWolf Resident Curmudgeon Posts: 76,402 Karma: 136466962 Join Date: Nov 2006 Location: Roslindale, Massachusetts Device: Kobo Libra 2, Kobo Aura H2O, PRS-650, PRS-T1, nook STR, PW3	Calibre 3.48 may no longer work if the database is in the new Calibre 5 format. So if you've used Calibre 5, forget Calibre 3.48 and just learn to deal with the wait time for the eBook to open.