Viewer slow first read and what are the shortcuts

aardbewoner · 10-19-2019, 01:58 PM

Today oct 19 i started using 4.1 on linux. And i Grumble on the viewer, it take minutes to read a ebook for the first time ! Is there a way he can read the whole library during the night ? second if i use escape and customize the keyboard shortcuts it does not show what the shortcuts are now. Trying to find them in the manual give no result

theducks · 10-19-2019, 02:14 PM

Read a Library in a night? I can rarely read ONE BOOK in a day.

aardbewoner · 10-19-2019, 02:32 PM

LOL no theducks to avoid the slow first read , that calibre reading all books as i sleep

theducks · 10-19-2019, 04:23 PM

You want it to Preload all the books.
But that would use a LOT of disk space, when all you really will look at is a few.

Obviously you don't harken back to the days of the original PC-XT (8080 processor) This is FAST

JSWolf · 10-19-2019, 04:24 PM

Quote:

Originally Posted by aardbewoner

Today oct 19 i started using 4.1 on linux. And i Grumble on the viewer, it take minutes to read a ebook for the first time ! Is there a way he can read the whole library during the night ? second if i use escape and customize the keyboard shortcuts it does not show what the shortcuts are now. Trying to find them in the manual give no result

Install Calibre 4.2. The speed to process an eBook for the first time has been improved and it's not nearly as slow as it was.

BetterRed · 10-19-2019, 05:59 PM

First time a book is 'read', it is converted/unpacked into calibre's cache folder. The unpacked version will stay there until calibre's BTS cache cleanup kicks in. I don't know what the cleanup thresholds are, and I've not seen spotted any related settings.

BR

kovidgoyal · 10-19-2019, 11:23 PM

I've never come across a book that takes minutes to open, if the viewer is really taking that long then there is something else going on in your system. Typical novel sized books on a decent system open in a second or two at most.

Das Kapital which has a book legnth of 26110 opened in 7.36 seconds for th first time on my system and in under a second on subsequent opens.

aardbewoner · 10-20-2019, 05:01 AM

Ok installed 4.2 indeed faster stil verry slow.
das kapital 3.9MB epub load time 29 sec,second load 32 sec
other space deputy epub 0.2 MB load19 sec, second load 8 sec

ubuntu 18.04.3 lts cpu 3805U 1.9 ghz 8GB ram python 2.7.15+

For me this is a decent system to read a book.

kovidgoyal · 10-20-2019, 05:03 AM

definitely something weird going on in your system. Those numbers look waaaay off.

aardbewoner · 10-20-2019, 05:05 AM

Hello Kovid any idea where/how to look ?
On the same system with calibre 3 it was "normal"

Is it possible to install version 3 together with 4 ?

kovidgoyal · 10-20-2019, 05:14 AM

first check the staartup time of the viewer alone without any book. Then run

calibre-debug -w file.epub

which will print out the amount of time it took to prepare the book.

And sure see the linux download page for how to install isolated calibre installs as well as installing previous versions.

aardbewoner · 10-20-2019, 07:57 AM

OK started calibre from terminal that give this " jan@xubu18:~$ calibre
<code>qt.qpa.xcb: QXcbConnection: XCB error: 148 (Unknown), sequence: 184, resource id: 0, major code: 140 (Unknown), minor code: 20 </code>
then in other terminal your code give same error cntr z and
<code> calibre-debug -w file.epub
Turning on automatic hidpi scaling
devicePixelRatio: 1.0
logicalDpi: 96.0 x 96.0
physicalDpi: 95.9763837638 x 96.0945812808
Using calibre Qt style: True
Cannot read from: file.epub
qt.qpa.xcb: QXcbConnection: XCB error: 148 (Unknown), sequence: 184, resource id: 0, major code: 140 (Unknown), minor code: 20
Book prepared in 0.00 seconds </code>
but took six

kovidgoyal · 10-20-2019, 08:27 AM

Yeah so as I suspected it has nothing to do with book preparing speed but Qt WebEngine is simply slow to start on your system. Not much I can do about that I'm afraid.

aardbewoner · 10-20-2019, 09:04 AM

OK thanks for the trying Kovid.

hiteshp · 09-01-2020, 06:42 AM

Quote:

Originally Posted by kovidgoyal

I've never come across a book that takes minutes to open, if the viewer is really taking that long then there is something else going on in your system. Typical novel sized books on a decent system open in a second or two at most.

Das Kapital which has a book legnth of 26110 opened in 7.36 seconds for th first time on my system and in under a second on subsequent opens.

today ... this problem got resolved after I disabled the NVidia enteries from the Context menu.

I used CCleaner to disable them. Now they seem to open faster. I tried opening atleast 50 books. Problems seems to be resolved.

10-19-2019, 01:58 PM	#1
aardbewoner Grumpy Posts: 74 Karma: 2222222 Join Date: Apr 2012 Device: linux computers ,raspberry	Viewer slow first read and what are the shortcuts Today oct 19 i started using 4.1 on linux. And i Grumble on the viewer, it take minutes to read a ebook for the first time ! Is there a way he can read the whole library during the night ? second if i use escape and customize the keyboard shortcuts it does not show what the shortcuts are now. Trying to find them in the manual give no result Last edited by aardbewoner; 10-19-2019 at 01:59 PM. Reason: Oops spelling

10-20-2019, 05:01 AM	#8
aardbewoner Grumpy Posts: 74 Karma: 2222222 Join Date: Apr 2012 Device: linux computers ,raspberry	Ok installed 4.2 indeed faster stil verry slow. das kapital 3.9MB epub load time 29 sec,second load 32 sec other space deputy epub 0.2 MB load19 sec, second load 8 sec ubuntu 18.04.3 lts cpu 3805U 1.9 ghz 8GB ram python 2.7.15+ For me this is a decent system to read a book. Last edited by aardbewoner; 10-20-2019 at 05:03 AM. Reason: add remark

10-20-2019, 05:05 AM	#10
aardbewoner Grumpy Posts: 74 Karma: 2222222 Join Date: Apr 2012 Device: linux computers ,raspberry	Hello Kovid any idea where/how to look ? On the same system with calibre 3 it was "normal" Is it possible to install version 3 together with 4 ? Last edited by aardbewoner; 10-20-2019 at 05:12 AM. Reason: question added

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10-19-2019, 02:14 PM	#2
theducks Well trained by Cats Posts: 30,454 Karma: 58055868 Join Date: Aug 2009 Location: The Central Coast of California Device: Kobo Libra2,Kobo Aura2v1, K4NT(Fixed: New Bat.), Galaxy Tab A	Read a Library in a night? I can rarely read ONE BOOK in a day.

10-19-2019, 02:32 PM	#3
aardbewoner Grumpy Posts: 74 Karma: 2222222 Join Date: Apr 2012 Device: linux computers ,raspberry	LOL no theducks to avoid the slow first read , that calibre reading all books as i sleep

10-19-2019, 04:23 PM	#4
theducks Well trained by Cats Posts: 30,454 Karma: 58055868 Join Date: Aug 2009 Location: The Central Coast of California Device: Kobo Libra2,Kobo Aura2v1, K4NT(Fixed: New Bat.), Galaxy Tab A	You want it to Preload all the books. But that would use a LOT of disk space, when all you really will look at is a few. Obviously you don't harken back to the days of the original PC-XT (8080 processor) This is FAST

10-19-2019, 05:59 PM	#6
BetterRed null operator (he/him) Posts: 21,008 Karma: 27620706 Join Date: Mar 2012 Location: Sydney Australia Device: none	First time a book is 'read', it is converted/unpacked into calibre's cache folder. The unpacked version will stay there until calibre's BTS cache cleanup kicks in. I don't know what the cleanup thresholds are, and I've not seen spotted any related settings. BR

10-19-2019, 11:23 PM	#7
kovidgoyal creator of calibre Posts: 44,566 Karma: 24495948 Join Date: Oct 2006 Location: Mumbai, India Device: Various	I've never come across a book that takes minutes to open, if the viewer is really taking that long then there is something else going on in your system. Typical novel sized books on a decent system open in a second or two at most. Das Kapital which has a book legnth of 26110 opened in 7.36 seconds for th first time on my system and in under a second on subsequent opens.

10-20-2019, 05:03 AM	#9
kovidgoyal creator of calibre Posts: 44,566 Karma: 24495948 Join Date: Oct 2006 Location: Mumbai, India Device: Various	definitely something weird going on in your system. Those numbers look waaaay off.

10-20-2019, 05:14 AM	#11
kovidgoyal creator of calibre Posts: 44,566 Karma: 24495948 Join Date: Oct 2006 Location: Mumbai, India Device: Various	first check the staartup time of the viewer alone without any book. Then run calibre-debug -w file.epub which will print out the amount of time it took to prepare the book. And sure see the linux download page for how to install isolated calibre installs as well as installing previous versions.

10-20-2019, 07:57 AM	#12
aardbewoner Grumpy Posts: 74 Karma: 2222222 Join Date: Apr 2012 Device: linux computers ,raspberry	OK started calibre from terminal that give this " jan@xubu18:~$ calibre <code>qt.qpa.xcb: QXcbConnection: XCB error: 148 (Unknown), sequence: 184, resource id: 0, major code: 140 (Unknown), minor code: 20 </code> then in other terminal your code give same error cntr z and <code> calibre-debug -w file.epub Turning on automatic hidpi scaling devicePixelRatio: 1.0 logicalDpi: 96.0 x 96.0 physicalDpi: 95.9763837638 x 96.0945812808 Using calibre Qt style: True Cannot read from: file.epub qt.qpa.xcb: QXcbConnection: XCB error: 148 (Unknown), sequence: 184, resource id: 0, major code: 140 (Unknown), minor code: 20 Book prepared in 0.00 seconds </code> but took six

10-20-2019, 08:27 AM	#13
kovidgoyal creator of calibre Posts: 44,566 Karma: 24495948 Join Date: Oct 2006 Location: Mumbai, India Device: Various	Yeah so as I suspected it has nothing to do with book preparing speed but Qt WebEngine is simply slow to start on your system. Not much I can do about that I'm afraid.

10-20-2019, 09:04 AM	#14
aardbewoner Grumpy Posts: 74 Karma: 2222222 Join Date: Apr 2012 Device: linux computers ,raspberry	OK thanks for the trying Kovid.

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