Antivirus really slows down Calibre

Giuseppe Chillem · 11-26-2011, 06:00 PM

Afteer month of use I have disable my Kaspersky antivirus and the results are astonishing.
Previusly Calibre took minutes to start-up. Now I have it loaded in less than one minute and even less than 30 seconds.
The startup time for adding a book is non existant. Previosuly I had to way for Calibre to start for over than one minute.
I don't know if other users had the same experience.
I whish to share mine with you.

theducks · 11-26-2011, 08:17 PM

Quote:

Originally Posted by Giuseppe Chillem

Afteer month of use I have disable my Kaspersky antivirus and the results are astonishing.
Previusly Calibre took minutes to start-up. Now I have it loaded in less than one minute and even less than 30 seconds.
The startup time for adding a book is non existant. Previosuly I had to way for Calibre to start for over than one minute.
I don't know if other users had the same experience.
I whish to share mine with you.

It is a very good policy to exclude the Library folder from Real time scans (the Paranoid can leave it for manual scans)
Another Great policy, is to always have your Anti-virus ASK you what to do if it finds a positive instead of automatically fixing a false positive

and destroying a database (Calibre is a database at its core) by surgically removing bad stuff.

kovidgoyal · 11-26-2011, 08:53 PM

Over the years I have heard this from many calibre users. It is unfortunate that a/v programs do this.

carpetmojo · 11-27-2011, 08:51 AM

I run Avast, and Malabyte, and Calibre seems unaffected by them, all very quick & speedy.

Agama · 11-27-2011, 10:56 AM

Quote:

Originally Posted by carpetmojo

I run Avast, and Malabyte, and Calibre seems unaffected by them, all very quick & speedy.

Also running Avast, (Free Edition), and does not seem to affect calibre. Start-up time for calibre is less than 3 seconds on Intel core-duo, Windows 7 PC.

kovidgoyal · 11-27-2011, 11:11 AM

I suspect it has to do with if the a/v program does "real time protection", i.e. it intercepts every filesystem operation calibre does, checks it and only allows it if it thinks it is safe.

Divingduck · 11-27-2011, 11:31 AM

I guess it´s a combination of Hardware and AV. Specialy if you are running all in one solutions. These packages mostly have not well defined setups for all kind of users/hardware and on the other hand there is the user who is thinking more is better and use all possible options the software is providing. On hardware with low resources I install only the internal firewall of OS and a small only AV solution what works perfect for "normal" users.

CRussel · 11-27-2011, 11:33 AM

This is a Kapersky issue. Not all A-V programs cause issues with Calibre. I'm using MS A-V, and having zero problems. (It does a real time scan, just as Kapersky does, but is apparently smarter about it wrt Calibre, because it doesn't appreciably slow the program down.) I suggest this is something to take up with Kapersky.

PeterT · 11-27-2011, 01:24 PM

I use ESET NOD32 and see no apparent slow down either; it also is doing real-time scans.

theducks · 11-27-2011, 01:42 PM

What kind of hardware (and Windows version) are the "no slow down" folk running?
CPU (brand, speed, cores)
RAM
HD type (PATA, SATA, other)

XP SP3
Minor slowdown after excluding active scans on the Library
P4 3.2 1 core (hyper threaded)
1.5G
PATA

Ripplinger · 11-27-2011, 01:56 PM

I also use Kaspersky and after reading this thread, I added calibre.exe to the excluded and trusted lists. Wow... what used to take forever to load now takes just a few seconds to fully load Calibre (and I mean literally 2-3 seconds now). I still let Kaspersky scan any net activity just in case I manage to get a virus that plants itself in the Calibre directory, and that's not slowing it down at all.

So there's a good and easy workaround for it.

CRussel · 11-27-2011, 02:00 PM

HP Laptop, Windows 7 Enterprise. Intel Core i7-2620M.
8GB RAM.
500 GB, 7500 RPM, SATA2 HD

Also several other machines. Even an ancient AMD 64-bit, single core, laptop with 2 GB of RAM. All are running Windows 7 64-bit, Enterprise or Ultimate. All using one or another versions of MS A-V.

PeterT · 11-27-2011, 02:01 PM

Windows 7. 64-bit
8 GB ram
Sandy Bridge i5-2500K 3.30 GHz
SATA

Agama · 11-28-2011, 07:12 AM

Windows 7 (64-bit)
Intel dual-core 2.93 GHz
4GB RAM
SATA 7200 rpm

jersysman · 11-28-2011, 11:05 AM

I also use Kaspersky and have Calibre listed as a trusted program. I am not seeing these slowdowns that the OP is seeing. I always felt that Calibre was pretty responsive for me.

11-26-2011, 06:00 PM	#1
Giuseppe Chillem Groupie Posts: 190 Karma: 134 Join Date: May 2010 Device: IREX DR1000	Antivirus really slows down Calibre Afteer month of use I have disable my Kaspersky antivirus and the results are astonishing. Previusly Calibre took minutes to start-up. Now I have it loaded in less than one minute and even less than 30 seconds. The startup time for adding a book is non existant. Previosuly I had to way for Calibre to start for over than one minute. I don't know if other users had the same experience. I whish to share mine with you.

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11-26-2011, 08:53 PM	#3
kovidgoyal creator of calibre Posts: 45,347 Karma: 27182818 Join Date: Oct 2006 Location: Mumbai, India Device: Various	Over the years I have heard this from many calibre users. It is unfortunate that a/v programs do this.

11-27-2011, 08:51 AM	#4
carpetmojo Wizard Posts: 3,117 Karma: 9269999 Join Date: Feb 2011 Location: UK Device: Sony- T3, PRS650, 350, T1/2/3, Paperwhite, Fire 8.9,Samsung Tab S 10.5	I run Avast, and Malabyte, and Calibre seems unaffected by them, all very quick & speedy.

11-27-2011, 11:11 AM	#6
kovidgoyal creator of calibre Posts: 45,347 Karma: 27182818 Join Date: Oct 2006 Location: Mumbai, India Device: Various	I suspect it has to do with if the a/v program does "real time protection", i.e. it intercepts every filesystem operation calibre does, checks it and only allows it if it thinks it is safe.

11-27-2011, 11:31 AM	#7
Divingduck Wizard Posts: 1,166 Karma: 1410083 Join Date: Nov 2010 Location: Germany Device: Sony PRS-650	I guess it´s a combination of Hardware and AV. Specialy if you are running all in one solutions. These packages mostly have not well defined setups for all kind of users/hardware and on the other hand there is the user who is thinking more is better and use all possible options the software is providing. On hardware with low resources I install only the internal firewall of OS and a small only AV solution what works perfect for "normal" users.

11-27-2011, 11:33 AM	#8
CRussel (he/him/his) Posts: 12,296 Karma: 80074820 Join Date: Jul 2010 Location: Sunshine Coast, BC Device: Oasis (Gen3),Paperwhite (Gen10), Voyage, Paperwhite(orig), iPad Air M3	This is a Kapersky issue. Not all A-V programs cause issues with Calibre. I'm using MS A-V, and having zero problems. (It does a real time scan, just as Kapersky does, but is apparently smarter about it wrt Calibre, because it doesn't appreciably slow the program down.) I suggest this is something to take up with Kapersky.

11-27-2011, 01:24 PM	#9
PeterT Grand Sorcerer Posts: 13,511 Karma: 78910202 Join Date: Nov 2007 Location: Toronto Device: Libra H2O, Libra Colour	I use ESET NOD32 and see no apparent slow down either; it also is doing real-time scans.

11-27-2011, 01:42 PM	#10
theducks Well trained by Cats Posts: 31,054 Karma: 60358908 Join Date: Aug 2009 Location: The Central Coast of California Device: Kobo Libra2,Kobo Aura2v1, K4NT(Fixed: New Bat.), Galaxy Tab A	What kind of hardware (and Windows version) are the "no slow down" folk running? CPU (brand, speed, cores) RAM HD type (PATA, SATA, other) XP SP3 Minor slowdown after excluding active scans on the Library P4 3.2 1 core (hyper threaded) 1.5G PATA

11-27-2011, 01:56 PM	#11
Ripplinger 350 Hoarder Posts: 3,574 Karma: 8281267 Join Date: Dec 2010 Location: Midwest USA Device: Sony PRS-350, Kobo Glo & Glo HD, PW2	I also use Kaspersky and after reading this thread, I added calibre.exe to the excluded and trusted lists. Wow... what used to take forever to load now takes just a few seconds to fully load Calibre (and I mean literally 2-3 seconds now). I still let Kaspersky scan any net activity just in case I manage to get a virus that plants itself in the Calibre directory, and that's not slowing it down at all. So there's a good and easy workaround for it.

11-27-2011, 02:00 PM	#12
CRussel (he/him/his) Posts: 12,296 Karma: 80074820 Join Date: Jul 2010 Location: Sunshine Coast, BC Device: Oasis (Gen3),Paperwhite (Gen10), Voyage, Paperwhite(orig), iPad Air M3	HP Laptop, Windows 7 Enterprise. Intel Core i7-2620M. 8GB RAM. 500 GB, 7500 RPM, SATA2 HD Also several other machines. Even an ancient AMD 64-bit, single core, laptop with 2 GB of RAM. All are running Windows 7 64-bit, Enterprise or Ultimate. All using one or another versions of MS A-V.

11-27-2011, 02:01 PM	#13
PeterT Grand Sorcerer Posts: 13,511 Karma: 78910202 Join Date: Nov 2007 Location: Toronto Device: Libra H2O, Libra Colour	Windows 7. 64-bit 8 GB ram Sandy Bridge i5-2500K 3.30 GHz SATA

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11-28-2011, 07:12 AM	#14
Agama Guru Posts: 776 Karma: 2751519 Join Date: Jul 2010 Location: UK Device: PW2, Nexus7	Windows 7 (64-bit) Intel dual-core 2.93 GHz 4GB RAM SATA 7200 rpm

11-28-2011, 11:05 AM	#15
jersysman Wizard Posts: 1,747 Karma: 3761220 Join Date: Mar 2011 Location: Pennsylvania Device: T1 Red, Kindle Fire, Kindle PW, PW2, Nook HD+, Kobo Mini, Aura HD	I also use Kaspersky and have Calibre listed as a trusted program. I am not seeing these slowdowns that the OP is seeing. I always felt that Calibre was pretty responsive for me.