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Old 09-01-2020, 06:48 AM   #16
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Quote:
Originally Posted by kovidgoyal View Post
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.

edit:

now a 443mb ePub opened in less than 15 seconds first time.
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Old 04-26-2021, 04:53 PM   #17
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5.16.1 ebook-viewer 13 sec. load time (not even first read!)!
I get long loading times for first read and subsequent reads, even on Calibre 5.16.1 on a fast Linux machine:
Quote:
Originally Posted by kovidgoyal View Post
calibre-debug -w file.epub
Code:
Turning on automatic hidpi scaling
devicePixelRatio: 1.0
logicalDpi: 196.0 x 196.0
physicalDpi: 162.56 x 161.36470588235292
Using calibre Qt style: True
[0.000] Load of book started
[0.005] prepared emitted
[0.221] webview loading requested
[8.103] bridge ready
[13.141] loading finished
This is a small (128 kB) EPUB.
Last edited by Geremia; 04-26-2021 at 05:36 PM.
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Old 04-26-2021, 10:22 PM   #18
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That will be because qt webengine is slow on your machine, most likely because of GPU driver issues.
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Old 04-27-2021, 02:50 PM   #19
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Quote:
Originally Posted by kovidgoyal View Post
That will be because qt webengine is slow on your machine, most likely because of GPU driver issues.
I was using the open-source Nouveau driver. Now I'm using the proprietary Nvidia one, and I'm still getting the same slow load times (0.28MB EPUB here):

Code:
[0.000] Load of book started
[0.004] prepared emitted
[0.467] webview loading requested
[5.304] bridge ready
[7.332] loading finished
Turning on automatic hidpi scaling
devicePixelRatio: 1.0
logicalDpi: 196.0 x 196.0
physicalDpi: 162.56 x 161.36470588235292
Using calibre Qt style: True
Last edited by Geremia; 04-27-2021 at 06:16 PM.
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Old 04-27-2021, 11:12 PM   #20
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You can see it in the timings

[0.467] webview loading requested
[5.304] bridge ready

bridge ready is when webengine has finished initializing itself. On a properly functioning system it would be something like

[0.064] webview loading requested
[0.420] bridge ready
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Old 04-28-2021, 05:13 PM   #21
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Quote:
Originally Posted by Geremia View Post
I was using the open-source Nouveau driver. Now I'm using the proprietary Nvidia one, and I'm still getting the same slow load times (0.28MB EPUB here):

Code:
[0.000] Load of book started
[0.004] prepared emitted
[0.467] webview loading requested
[5.304] bridge ready
[7.332] loading finished
Turning on automatic hidpi scaling
devicePixelRatio: 1.0
logicalDpi: 196.0 x 196.0
physicalDpi: 162.56 x 161.36470588235292
Using calibre Qt style: True
What made a huge difference for me was setting calibre (and its processes, including QtWebEngineProcess.exe) to use the dedicated GPU.
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Old 04-29-2021, 01:07 AM   #22
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Quote:
Originally Posted by kovidgoyal View Post
You can see it in the timings

[0.467] webview loading requested
[5.304] bridge ready

bridge ready is when webengine has finished initializing itself. On a properly functioning system it would be something like

[0.064] webview loading requested
[0.420] bridge ready
I have no slow WebEngine issues using my own local QtWebEngine libraries (quicknanobrowser loads instantly). Could it have something to do with calibre's binaries,
Code:
/opt/calibre/lib/libQt5WebEngine.so.5
/opt/calibre/lib/libQt5WebEngineCore.so.5
/opt/calibre/lib/libQt5WebEngineWidgets.so.5
?

How can I make Calibre use my local WebEngine libraries? Would I have to build Calibre from scratch?
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Old 04-29-2021, 01:08 AM   #23
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Quote:
Originally Posted by thiago.eec View Post
What made a huge difference for me was setting calibre (and its processes, including QtWebEngineProcess.exe) to use the dedicated GPU.
Where do I set that?
Last edited by Geremia; 04-29-2021 at 01:13 AM.
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Old 04-29-2021, 05:04 AM   #24
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Yes if you want to use system libraries, you have to build from source.
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Old 04-29-2021, 06:25 AM   #25
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Quote:
Originally Posted by kovidgoyal View Post
first check the staartup time of the viewer alone without any book.
How do I do that, please?

Quote:
Then run
calibre-debug -w file.epub

which will print out the amount of time it took to prepare the book.
How do I do that on Windows?

Thanks.
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Old 04-29-2021, 01:25 PM   #26
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Quote:
Originally Posted by Geremia View Post
Where do I set that?
To change your graphical performance settings for an app:

1) Launch the Settings app.
2) Browse to System > Display > (scroll down) > Graphics settings.
3) Browse for a Classic app or Universal app to set preferences for.
4) Click the added app in the list and press Options.
5) Choose your performance mode preference and press "Save".

Repeat steps 3 to 5 mainly for this executables on calibre folder: calibre.exe, calibre-parallel.exe, ebook-edit.exe, ebook-viewer.exe and app/bin/QtWebEngineProcess.exe.

Maybe not all of them are necessary, but it surely doesn't hurt.
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Old 04-29-2021, 01:31 PM   #27
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Quote:
Originally Posted by Rida View Post
How do I do that, please?

How do I do that on Windows?

Thanks.
1) Type CMD on windows search bar and press enter.
2) To open the Viewer without a book, just type: calibre-debug -w
3) To open a book, type: calibre-debug -w "path/to/the/book/book.epub"

Theses commands will print the timings on your console window (CMD).
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Old 04-29-2021, 08:54 PM   #28
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Quote:
Originally Posted by kovidgoyal View Post
[0.467] webview loading requested
[5.304] bridge ready
Here's what goes on between "webview loading" and "bridge ready"

Code:
$ QTWEBENGINE_CHROMIUM_FLAGS="--enable-logging --log-level=0 --no-sandbox --v=1" nonet calibre-debug -w *.epub 

[12:12:0429/171736.235867:INFO:cpu_info.cc(53)] Available number of cores: 64
[12:12:0429/171736.235921:VERBOSE1:zygote_main_linux.cc(220)] ZygoteMain: initializing 0 fork delegates
[13:13:0429/171736.237679:INFO:cpu_info.cc(53)] Available number of cores: 64
[13:13:0429/171736.237734:VERBOSE1:zygote_main_linux.cc(220)] ZygoteMain: initializing 0 fork delegates
[3:3:0429/171736.240797:VERBOSE1:webrtc_internals.cc(123)] Could not get the download directory.
[3:3:0429/171736.243292:VERBOSE1:proxy_config_service_linux.cc(1261)] Obtained proxy settings from annotation hash code 11258689
[3:3:0429/171736.263491:VERBOSE1:proxy_config_service_linux.cc(1261)] Obtained proxy settings from annotation hash code 11258689
[27:44:0429/171736.288657:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Google 'Argon2020' log
[27:44:0429/171736.288717:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Google 'Argon2021' log
[27:44:0429/171736.288722:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Google 'Argon2022' log
[27:44:0429/171736.288726:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Google 'Argon2023' log
[27:44:0429/171736.288730:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Google 'Xenon2020' log
[27:44:0429/171736.288734:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Google 'Xenon2021' log
[27:44:0429/171736.288739:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Google 'Xenon2022' log
[27:44:0429/171736.288743:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Google 'Xenon2023' log
[27:44:0429/171736.288747:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Google 'Aviator' log
[27:44:0429/171736.288751:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Google 'Icarus' log
[27:44:0429/171736.288755:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Google 'Pilot' log
[27:44:0429/171736.288759:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Google 'Rocketeer' log
[27:44:0429/171736.288763:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Google 'Skydiver' log
[27:44:0429/171736.288767:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Cloudflare 'Nimbus2020' Log
[27:44:0429/171736.288771:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Cloudflare 'Nimbus2021' Log
[27:44:0429/171736.288775:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Cloudflare 'Nimbus2022' Log
[27:44:0429/171736.288779:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Cloudflare 'Nimbus2023' Log
[27:44:0429/171736.288783:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: DigiCert Log Server
[27:44:0429/171736.288787:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: DigiCert Log Server 2
[27:44:0429/171736.288796:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: DigiCert Yeti2020 Log
[27:44:0429/171736.288800:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: DigiCert Yeti2021 Log
[27:44:0429/171736.288804:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: DigiCert Yeti2022 Log
[27:44:0429/171736.288808:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: DigiCert Yeti2023 Log
[27:44:0429/171736.288812:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: DigiCert Nessie2020 Log
[27:44:0429/171736.288816:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: DigiCert Nessie2021 Log
[27:44:0429/171736.288820:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: DigiCert Nessie2022 Log
[27:44:0429/171736.288824:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: DigiCert Nessie2023 Log
[27:44:0429/171736.288828:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Venafi Gen2 CT log
[27:44:0429/171736.288832:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Sectigo 'Sabre' CT log
[27:44:0429/171736.288836:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Sectigo 'Mammoth' CT log
[27:44:0429/171736.288840:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Let's Encrypt 'Oak2020' log
[27:44:0429/171736.288849:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Let's Encrypt 'Oak2021' log
[27:44:0429/171736.288854:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Let's Encrypt 'Oak2022' log
[27:44:0429/171736.288858:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Symantec 'Sirius' log
[27:44:0429/171736.288862:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: StartCom log
[27:44:0429/171736.288866:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: WoSign log
[27:44:0429/171736.288870:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Izenpe log
[27:44:0429/171736.288874:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: CNNIC CT log
[27:44:0429/171736.288878:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Venafi log
[27:44:0429/171736.288882:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Symantec 'Vega' log
[27:44:0429/171736.288886:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Certly.IO log
[27:44:0429/171736.288890:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Symantec log
[27:44:0429/171736.289520:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Google 'Argon2020' log
[27:44:0429/171736.289531:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Google 'Argon2021' log
[27:44:0429/171736.289535:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Google 'Argon2022' log
[27:44:0429/171736.289545:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Google 'Argon2023' log
[27:44:0429/171736.289549:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Google 'Xenon2020' log
[27:44:0429/171736.289553:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Google 'Xenon2021' log
[27:44:0429/171736.289557:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Google 'Xenon2022' log
[27:44:0429/171736.289564:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Google 'Xenon2023' log
[27:44:0429/171736.289568:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Google 'Aviator' log
[27:44:0429/171736.289572:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Google 'Icarus' log
[27:44:0429/171736.289576:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Google 'Pilot' log
[27:44:0429/171736.289580:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Google 'Rocketeer' log
[27:44:0429/171736.289584:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Google 'Skydiver' log
[27:44:0429/171736.289588:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Cloudflare 'Nimbus2020' Log
[27:44:0429/171736.289592:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Cloudflare 'Nimbus2021' Log
[27:44:0429/171736.289596:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Cloudflare 'Nimbus2022' Log
[27:44:0429/171736.289600:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Cloudflare 'Nimbus2023' Log
[27:44:0429/171736.289605:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: DigiCert Log Server
[27:44:0429/171736.289609:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: DigiCert Log Server 2
[27:44:0429/171736.289613:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: DigiCert Yeti2020 Log
[27:44:0429/171736.289617:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: DigiCert Yeti2021 Log
[27:44:0429/171736.289621:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: DigiCert Yeti2022 Log
[27:44:0429/171736.289625:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: DigiCert Yeti2023 Log
[27:44:0429/171736.289629:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: DigiCert Nessie2020 Log
[27:44:0429/171736.289633:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: DigiCert Nessie2021 Log
[27:44:0429/171736.289637:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: DigiCert Nessie2022 Log
[27:44:0429/171736.289641:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: DigiCert Nessie2023 Log
[27:44:0429/171736.289645:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Venafi Gen2 CT log
[27:44:0429/171736.289649:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Sectigo 'Sabre' CT log
[27:44:0429/171736.289656:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Sectigo 'Mammoth' CT log
[27:44:0429/171736.289660:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Let's Encrypt 'Oak2020' log
[27:44:0429/171736.289664:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Let's Encrypt 'Oak2021' log
[27:44:0429/171736.289668:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Let's Encrypt 'Oak2022' log
[27:44:0429/171736.289672:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Symantec 'Sirius' log
[27:44:0429/171736.289676:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: StartCom log
[27:44:0429/171736.289680:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: WoSign log
[27:44:0429/171736.289684:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Izenpe log
[27:44:0429/171736.289688:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: CNNIC CT log
[27:44:0429/171736.289692:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Venafi log
[27:44:0429/171736.289699:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Symantec 'Vega' log
[27:44:0429/171736.289703:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Certly.IO log
[27:44:0429/171736.289707:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Symantec log
[3:3:0429/171736.296039:VERBOSE1:proxy_config_service_linux.cc(1261)] Obtained proxy settings from annotation hash code 11258689
[27:44:0429/171736.312954:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Google 'Argon2020' log
[27:44:0429/171736.312969:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Google 'Argon2021' log
[27:44:0429/171736.312974:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Google 'Argon2022' log
[27:44:0429/171736.312979:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Google 'Argon2023' log
[27:44:0429/171736.312985:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Google 'Xenon2020' log
[27:44:0429/171736.312989:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Google 'Xenon2021' log
[27:44:0429/171736.312993:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Google 'Xenon2022' log
[27:44:0429/171736.312997:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Google 'Xenon2023' log
[27:44:0429/171736.313001:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Google 'Aviator' log
[27:44:0429/171736.313005:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Google 'Icarus' log
[27:44:0429/171736.313009:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Google 'Pilot' log
[27:44:0429/171736.313013:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Google 'Rocketeer' log
[27:44:0429/171736.313017:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Google 'Skydiver' log
[27:44:0429/171736.313021:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Cloudflare 'Nimbus2020' Log
[27:44:0429/171736.313025:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Cloudflare 'Nimbus2021' Log
[27:44:0429/171736.313029:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Cloudflare 'Nimbus2022' Log
[27:44:0429/171736.313033:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Cloudflare 'Nimbus2023' Log
[27:44:0429/171736.313037:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: DigiCert Log Server
[27:44:0429/171736.313041:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: DigiCert Log Server 2
[27:44:0429/171736.313045:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: DigiCert Yeti2020 Log
[27:44:0429/171736.313049:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: DigiCert Yeti2021 Log
[27:44:0429/171736.313053:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: DigiCert Yeti2022 Log
[27:44:0429/171736.313057:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: DigiCert Yeti2023 Log
[27:44:0429/171736.313061:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: DigiCert Nessie2020 Log
[27:44:0429/171736.313065:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: DigiCert Nessie2021 Log
[27:44:0429/171736.313069:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: DigiCert Nessie2022 Log
[27:44:0429/171736.313075:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: DigiCert Nessie2023 Log
[27:44:0429/171736.313080:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Venafi Gen2 CT log
[27:44:0429/171736.313084:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Sectigo 'Sabre' CT log
[27:44:0429/171736.313088:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Sectigo 'Mammoth' CT log
[27:44:0429/171736.313092:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Let's Encrypt 'Oak2020' log
[27:44:0429/171736.313096:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Let's Encrypt 'Oak2021' log
[27:44:0429/171736.313100:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Let's Encrypt 'Oak2022' log
[27:44:0429/171736.313104:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Symantec 'Sirius' log
[27:44:0429/171736.313108:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: StartCom log
[27:44:0429/171736.313112:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: WoSign log
[27:44:0429/171736.313119:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Izenpe log
[27:44:0429/171736.313123:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: CNNIC CT log
[27:44:0429/171736.313127:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Venafi log
[27:44:0429/171736.313131:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Symantec 'Vega' log
[27:44:0429/171736.313135:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Certly.IO log
[27:44:0429/171736.313139:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Symantec log
[3:24:0429/171738.583294:VERBOSE1:gles2_cmd_decoder.cc(3850)] GL_EXT_packed_depth_stencil supported.
[3:24:0429/171738.600374:VERBOSE1:gles2_cmd_decoder.cc(3850)] GL_EXT_packed_depth_stencil supported.
[3:24:0429/171739.125465:VERBOSE1:gles2_cmd_decoder.cc(3850)] GL_EXT_packed_depth_stencil supported.
[51:51:0429/171739.184925:ERROR:paint_controller.cc(646)] PaintController::FinishCycle() completed
[3:24:0429/171739.193059:VERBOSE1:gles2_cmd_decoder.cc(3850)] GL_EXT_packed_depth_stencil supported.
[27:44:0429/171741.302659:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Google 'Argon2020' log
[27:44:0429/171741.302694:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Google 'Argon2021' log
[27:44:0429/171741.302699:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Google 'Argon2022' log
[27:44:0429/171741.302704:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Google 'Argon2023' log
[27:44:0429/171741.302709:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Google 'Xenon2020' log
[27:44:0429/171741.302713:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Google 'Xenon2021' log
[27:44:0429/171741.302718:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Google 'Xenon2022' log
[27:44:0429/171741.302722:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Google 'Xenon2023' log
[27:44:0429/171741.302727:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Google 'Aviator' log
[27:44:0429/171741.302732:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Google 'Icarus' log
[27:44:0429/171741.302737:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Google 'Pilot' log
[27:44:0429/171741.302742:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Google 'Rocketeer' log
[27:44:0429/171741.302747:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Google 'Skydiver' log
[27:44:0429/171741.302752:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Cloudflare 'Nimbus2020' Log
[27:44:0429/171741.302756:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Cloudflare 'Nimbus2021' Log
[27:44:0429/171741.302761:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Cloudflare 'Nimbus2022' Log
[27:44:0429/171741.302765:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Cloudflare 'Nimbus2023' Log
[27:44:0429/171741.302770:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: DigiCert Log Server
[27:44:0429/171741.302775:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: DigiCert Log Server 2
[27:44:0429/171741.302780:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: DigiCert Yeti2020 Log
[27:44:0429/171741.302790:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: DigiCert Yeti2021 Log
[27:44:0429/171741.302796:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: DigiCert Yeti2022 Log
[27:44:0429/171741.302803:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: DigiCert Yeti2023 Log
[27:44:0429/171741.302808:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: DigiCert Nessie2020 Log
[27:44:0429/171741.302814:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: DigiCert Nessie2021 Log
[27:44:0429/171741.302820:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: DigiCert Nessie2022 Log
[27:44:0429/171741.302826:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: DigiCert Nessie2023 Log
[27:44:0429/171741.302831:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Venafi Gen2 CT log
[27:44:0429/171741.302837:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Sectigo 'Sabre' CT log
[27:44:0429/171741.302842:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Sectigo 'Mammoth' CT log
[27:44:0429/171741.302847:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Let's Encrypt 'Oak2020' log
[27:44:0429/171741.302852:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Let's Encrypt 'Oak2021' log
[27:44:0429/171741.302859:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Let's Encrypt 'Oak2022' log
[27:44:0429/171741.302864:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Symantec 'Sirius' log
[27:44:0429/171741.302870:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: StartCom log
[27:44:0429/171741.302875:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: WoSign log
[27:44:0429/171741.302881:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Izenpe log
[27:44:0429/171741.302887:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: CNNIC CT log
[27:44:0429/171741.302892:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Venafi log
[27:44:0429/171741.302898:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Symantec 'Vega' log
[27:44:0429/171741.302903:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Certly.IO log
[27:44:0429/171741.302908:VERBOSE1:multi_log_ct_verifier.cc(61)] Adding CT log: Symantec log
[29:29:0429/171743.148343:VERBOSE1:local_window_proxy.cc(240)] A context is created NOT from snapshot
[29:29:0429/171743.149210:VERBOSE1:script_context.cc(119)] Created context:
  extension id:           (none)
  frame:                  0x98c5c422d0
  URL:                    
  context_type:           WEB_PAGE
  effective extension id: (none)
  effective context type: WEB_PAGE
[29:29:0429/171743.150016:VERBOSE1:script_context.cc(119)] Created context:
  extension id:           (none)
  frame:                  (nil)
  URL:                    
  context_type:           UNSPECIFIED
  effective extension id: (none)
  effective context type: UNSPECIFIED
[29:29:0429/171743.150204:VERBOSE1:dispatcher.cc(372)] Num tracked contexts: 1
[29:29:0429/171743.156079:VERBOSE1:local_window_proxy.cc(240)] A context is created NOT from snapshot
[29:29:0429/171743.156216:VERBOSE1:script_context.cc(119)] Created context:
  extension id:           (none)
  frame:                  0x98c5c422d0
  URL:                    
  context_type:           WEB_PAGE
  effective extension id: (none)
  effective context type: WEB_PAGE
[29:29:0429/171743.156295:VERBOSE1:script_context.cc(119)] Created context:
  extension id:           (none)
  frame:                  (nil)
  URL:                    
  context_type:           UNSPECIFIED
  effective extension id: (none)
  effective context type: UNSPECIFIED
[29:29:0429/171743.156386:VERBOSE1:dispatcher.cc(372)] Num tracked contexts: 2
[51:51:0429/171745.648721:VERBOSE1:local_window_proxy.cc(240)] A context is created NOT from snapshot
[51:51:0429/171745.650011:VERBOSE1:script_context.cc(119)] Created context:
  extension id:           (none)
  frame:                  0x246e24b822d0
  URL:                    
  context_type:           WEB_PAGE
  effective extension id: (none)
  effective context type: WEB_PAGE
[51:51:0429/171745.650910:VERBOSE1:script_context.cc(119)] Created context:
  extension id:           (none)
  frame:                  (nil)
  URL:                    
  context_type:           UNSPECIFIED
  effective extension id: (none)
  effective context type: UNSPECIFIED
[51:51:0429/171745.651139:VERBOSE1:dispatcher.cc(372)] Num tracked contexts: 1
[51:51:0429/171745.660375:ERROR:paint_controller.cc(646)] PaintController::FinishCycle() completed
[51:51:0429/171745.700472:VERBOSE1:local_window_proxy.cc(240)] A context is created NOT from snapshot
[51:51:0429/171745.700697:VERBOSE1:script_context.cc(119)] Created context:
  extension id:           (none)
  frame:                  0x246e24b822d0
  URL:                    
  context_type:           WEB_PAGE
  effective extension id: (none)
  effective context type: WEB_PAGE
[51:51:0429/171745.700779:VERBOSE1:script_context.cc(119)] Created context:
  extension id:           (none)
  frame:                  (nil)
  URL:                    
  context_type:           UNSPECIFIED
  effective extension id: (none)
  effective context type: UNSPECIFIED
[51:51:0429/171745.700893:VERBOSE1:dispatcher.cc(372)] Num tracked contexts: 2
[51:51:0429/171745.860505:ERROR:paint_controller.cc(646)] PaintController::FinishCycle() completed
[51:51:0429/171748.464491:VERBOSE1:local_window_proxy.cc(240)] A context is created NOT from snapshot
[51:51:0429/171748.464949:VERBOSE1:script_context.cc(119)] Created context:
  extension id:           (none)
  frame:                  0x246e24b9e360
  URL:                    
  context_type:           WEB_PAGE
  effective extension id: (none)
  effective context type: WEB_PAGE
[51:51:0429/171748.465042:VERBOSE1:script_context.cc(119)] Created context:
  extension id:           (none)
  frame:                  (nil)
  URL:                    
  context_type:           UNSPECIFIED
  effective extension id: (none)
  effective context type: UNSPECIFIED
[51:51:0429/171748.465171:VERBOSE1:dispatcher.cc(372)] Num tracked contexts: 3
[51:51:0429/171748.504331:VERBOSE1:local_window_proxy.cc(240)] A context is created NOT from snapshot
[51:51:0429/171748.504593:VERBOSE1:script_context.cc(119)] Created context:
  extension id:           (none)
  frame:                  0x246e24b9e360
  URL:                    
  context_type:           WEB_PAGE
  effective extension id: (none)
  effective context type: WEB_PAGE
[51:51:0429/171748.504687:VERBOSE1:script_context.cc(119)] Created context:
  extension id:           (none)
  frame:                  (nil)
  URL:                    
  context_type:           UNSPECIFIED
  effective extension id: (none)
  effective context type: UNSPECIFIED
[51:51:0429/171748.504815:VERBOSE1:dispatcher.cc(372)] Num tracked contexts: 4
[3:24:0429/171748.535493:VERBOSE1:gles2_cmd_decoder.cc(3850)] GL_EXT_packed_depth_stencil supported.
[51:51:0429/171748.569061:VERBOSE1:local_window_proxy.cc(240)] A context is created NOT from snapshot
[51:51:0429/171748.569678:VERBOSE1:script_context.cc(119)] Created context:
  extension id:           (none)
  frame:                  0x246e24caf198
  URL:                    
  context_type:           WEB_PAGE
  effective extension id: (none)
  effective context type: WEB_PAGE
[51:51:0429/171748.569798:VERBOSE1:script_context.cc(119)] Created context:
  extension id:           (none)
  frame:                  (nil)
  URL:                    
  context_type:           UNSPECIFIED
  effective extension id: (none)
  effective context type: UNSPECIFIED
[51:51:0429/171748.569952:VERBOSE1:dispatcher.cc(372)] Num tracked contexts: 5
[51:51:0429/171748.609394:VERBOSE1:local_window_proxy.cc(240)] A context is created NOT from snapshot
[51:51:0429/171748.609812:VERBOSE1:script_context.cc(119)] Created context:
  extension id:           (none)
  frame:                  0x246e24caf198
  URL:                    
  context_type:           WEB_PAGE
  effective extension id: (none)
  effective context type: WEB_PAGE
[51:51:0429/171748.609898:VERBOSE1:script_context.cc(119)] Created context:
  extension id:           (none)
  frame:                  (nil)
  URL:                    
  context_type:           UNSPECIFIED
  effective extension id: (none)
  effective context type: UNSPECIFIED
[51:51:0429/171748.610031:VERBOSE1:dispatcher.cc(372)] Num tracked contexts: 6
[51:51:0429/171748.646362:ERROR:paint_controller.cc(646)] PaintController::FinishCycle() completed
[51:51:0429/171748.696249:ERROR:paint_controller.cc(646)] PaintController::FinishCycle() completed
[51:51:0429/171752.361176:ERROR:paint_controller.cc(646)] PaintController::FinishCycle() completed
[51:51:0429/171753.110663:VERBOSE1:dispatcher.cc(552)] Num tracked contexts: 5
[51:51:0429/171753.110825:VERBOSE1:dispatcher.cc(552)] Num tracked contexts: 4
[51:51:0429/171753.113599:VERBOSE1:local_window_proxy.cc(240)] A context is created NOT from snapshot
[51:51:0429/171753.114090:VERBOSE1:script_context.cc(119)] Created context:
  extension id:           (none)
  frame:                  0x246e24b9e360
  URL:                    
  context_type:           WEB_PAGE
  effective extension id: (none)
  effective context type: WEB_PAGE
[51:51:0429/171753.114198:VERBOSE1:script_context.cc(119)] Created context:
  extension id:           (none)
  frame:                  (nil)
  URL:                    
  context_type:           UNSPECIFIED
  effective extension id: (none)
  effective context type: UNSPECIFIED
[51:51:0429/171753.114326:VERBOSE1:dispatcher.cc(372)] Num tracked contexts: 5
[51:51:0429/171753.115641:ERROR:paint_controller.cc(646)] PaintController::FinishCycle() completed
[51:51:0429/171753.116112:VERBOSE1:script_context.cc(126)] Destroyed context for extension
  extension id: 
  effective extension id: 
[51:51:0429/171753.116169:VERBOSE1:script_context.cc(126)] Destroyed context for extension
  extension id: 
  effective extension id: 
[51:51:0429/171753.116223:VERBOSE1:script_context.cc(126)] Destroyed context for extension
  extension id: 
  effective extension id: 
[51:51:0429/171753.116261:VERBOSE1:script_context.cc(126)] Destroyed context for extension
  extension id: 
  effective extension id: 
[51:51:0429/171753.124958:ERROR:paint_controller.cc(646)] PaintController::FinishCycle() completed
[51:51:0429/171753.179108:VERBOSE1:local_window_proxy.cc(240)] A context is created NOT from snapshot
[51:51:0429/171753.179364:VERBOSE1:script_context.cc(119)] Created context:
  extension id:           (none)
  frame:                  0x246e24b9e360
  URL:                    
  context_type:           WEB_PAGE
  effective extension id: (none)
  effective context type: WEB_PAGE
[51:51:0429/171753.179462:VERBOSE1:script_context.cc(119)] Created context:
  extension id:           (none)
  frame:                  (nil)
  URL:                    
  context_type:           UNSPECIFIED
  effective extension id: (none)
  effective context type: UNSPECIFIED
[51:51:0429/171753.179591:VERBOSE1:dispatcher.cc(372)] Num tracked contexts: 6
[51:51:0429/171754.404046:ERROR:paint_controller.cc(646)] PaintController::FinishCycle() completed
[51:51:0429/171755.183998:ERROR:paint_controller.cc(646)] PaintController::FinishCycle() completed
[51:51:0429/171755.467604:ERROR:paint_controller.cc(646)] PaintController::FinishCycle() completed
[51:51:0429/171755.518749:ERROR:paint_controller.cc(646)] PaintController::FinishCycle() completed
Why's it create 6 web contexts?
Last edited by Geremia; 04-29-2021 at 09:20 PM.
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Old 04-29-2021, 10:10 PM   #29
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That's normal. Whats not normal is the paint controller errors. Those are probably the cause of the slowdown. And those are almost certainly linked to GPU driver issues. Try turning off hardware acceleration. Might counter intuitively speed things up for you
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Old 04-30-2021, 03:42 PM   #30
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Quote:
Originally Posted by kovidgoyal View Post
Whats not normal is the paint controller errors. Those are probably the cause of the slowdown.
I get those same errors when running quicknanobrowser, too, and quicknanobrowser loads instantly.
Quote:
Originally Posted by kovidgoyal View Post
And those are almost certainly linked to GPU driver issues. Try turning off hardware acceleration.
QTWEBENGINE_CHROMIUM_FLAGS="--disable-gpu" has no effect; ebook-viewer still loads just as slowly.

Is there a way to go to "chrome://gpu" in ebook-viewer?

Once ebook-viewer loads an EPUB, it's not slow at all; I still wonder why it takes so long to load. It loads just as slowly for large as for small EPUBs. Opening another EPUB from within ebook-viewer takes a long time, too.
Last edited by Geremia; 04-30-2021 at 04:47 PM.
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