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Consumer Products => Avast Free Antivirus / Premium Security (legacy Pro Antivirus, Internet Security, Premier) => Topic started by: scubadoo on December 12, 2010, 06:29:04 PM

Title: Disapointed with Avast's impact on speed
Post by: scubadoo on December 12, 2010, 06:29:04 PM
I've been trying the Avast's free version over the last month or so having switched from Avira and whilst I really like the interface and the ability to configure its filtering, I hadn't checked out the impact on download speeds.
I had thought the recent sluggishness of my broadband was due to heavy traffic but having spent considerable time over the weekend trying several on-line "speed-checkers" with various Avast settings, I've decided to revert to Avira.
My findings (FWTW)....
Previously, with Avira my speeds were ranging from 5.5M - 11M depending on day and time of day.
This weekend, with Avast (WebShield enabled), speeds have been 3 - 7M and with Webshield disabled this immediately rose to 6.6 - 9.7.
I removed Avast and reinstalled Avira (default settings) and my speeds are now back around 10M.

Sorry, Avast, as I said, I do like the looks of the package but at that cost to performance it's a no-brainer.
Title: Re: Disapointed with Avast's impact on speed
Post by: christy a on December 12, 2010, 06:38:41 PM
I am having the same problem to,i thought my computer needed cleaned out but i did that and it hasnt helped.When i had the 4.8 Avast in my computer before i went to Avast5 never was that slow now it is like dial up.
Title: Re: Disapointed with Avast's impact on speed
Post by: CraigB on December 12, 2010, 06:43:17 PM
Maybe if you had of come here and supplied some info about your system and setup, previous av's what firewall your using we might have been able to help you rather than just stating your view and leaving as that has helped no one ::)
Title: Re: Disapointed with Avast's impact on speed
Post by: DavidR on December 12, 2010, 07:12:18 PM
It is hardly surprising as if you have the free avira, guess what, you have no web protection, you have to pay for that, see image.

I would have though as craigb suggests had you sought help here first I would imagine that a clean reinstall would have resolved this as I find zero difference in speed between avast 4.8 and avast 5.0 as essentially the web shield functionality is the same.
Title: Re: Disapointed with Avast's impact on speed
Post by: schmidthouse on December 12, 2010, 07:20:43 PM
I am having the same problem to,i thought my computer needed cleaned out but i did that and it hasnt helped.When i had the 4.8 Avast in my computer before i went to Avast5 never was that slow now it is like dial up.

Hello Christy a and welcome: I can understand what you are saying and how slow connections can be frustrating, however what craigb and DavidR have pointed out...with some further information and a bit of patience most of these issues can be corrected. Things like Firewall software, Malware, OS configurations and Processing speed can all have an effect on connections. Please provide some further information and I'm sure the two evangelists can help with your problem as well as the original poster.
Thanks... ;)
Title: Re: Disapointed with Avast's impact on speed
Post by: Vladimyr on December 13, 2010, 07:00:38 AM
There'd instead be a delay after the download has been completed but have you tried disabling 'intelligent stream scanning'?

"Use intelligent stream scanning - this is also checked by default. When checked, files that are downloaded are scanned in real-time i.e. during the actual download process. The packets of data are scanned as soon as they arrive - and the next ones are downloaded only when the previous packets have been verified to be infection-free. If this feature is disabled, by unchecking the box, the whole file will be downloaded to a temporary folder first and then scanned."
Title: Re: Disapointed with Avast's impact on speed
Post by: scubadoo on December 13, 2010, 11:47:09 AM
Wow, quite a response from a simple observation, thanks for the feedback.
So, for what it's worth, I'm running XP sp3, Comodo firewall (free) and Firefox (latest releases of all); I regularly run MalwareBytes and CCleaner to hopefully optimise things.
As stated, over the course of several days I tried various Avast settings including Vladimyr's suggestion of "intelligent stream scanning" both on and off.
But DavidR's comment confuses me ..... "It is hardly surprising as if you have the free avira ..... you have no web protection" ..... that's not the impression I got from the interface; if there's no "web protection", why's there a tick box for WebShield and why'd it cause such a slowdown?
I'm not trying to be funny, but as a non-expert on PCs/networks, Schmidthouse's comment on Firewall, Malware, OS config & Processing speed affecting (download?) speed is logical, but surely their effect should be somewhat similar between packages and I'd have thought the fewer system resources required implies a more efficient package.

As I said, it's a shame 'cos I liked the look/feel/tweakability of Avast.
Sadly, unless there's an EASY resolution to this issue I'll have to stick with Avira (with its flaky update procedure and annoying pop-ups).

Title: Re: Disapointed with Avast's impact on speed
Post by: SafeSurf on December 13, 2010, 12:05:33 PM
I just checked with Avira as well, and if you have the Free version, you do not have the Web Shield, Behavior Shield, Mail Shield that Avast Free has.  There are other Shields as well that Avast Pro and AIS offer that Avira does not include; I am not sure what version of Avast you had.

So with Avast running, you were better protected with the various Shields watching out for you by constantly scanning your machine and web sites for you, thus perhaps slowing you down slightly.  Is it worth it?  In my opinion, yes, to be better protected than the time trying to remove malware or worrying about it, especially the new malware that is out there these days!
Title: Re: Disapointed with Avast's impact on speed
Post by: zerotox on December 13, 2010, 12:36:17 PM
Hello. As one of Avira's developpers mentioned when discussing web guards (HTTP scanners) in various AV products - "And guys, every HTTP scanner slows down your system. Stop that silly arguing! :-) More scanning means more slow down. If you have a fast, modern machine with lots of RAM you might not notice it. But it is impossible to scan so many additional files without having an impact on your system. As a side note, the few HTTP scanners I tested so far cause the browser files to be scanned twice: first, the HTTP scanner module scans them and afterwards, the on-access guard again, when the browser stores the files into its cache."
Every user has quite different experiences with web guards in different AV programs. I myself find a very slight slowdown with both Avira Premium and Avast web guards. With downloading files though, Avast has implemented it in a better way, as it doesn't give you false speed readings as is the case with Avira Premium. Usually, I don't use web guards as I think Sandboxie will give you much better protection.
Title: Re: Disapointed with Avast's impact on speed
Post by: igor on December 13, 2010, 01:07:00 PM
Well, the quote is kinda questionable.
I mean sure, something is being scanned, so it has to have some effect - no arguing about that. But:
- don't see what RAM has to do with that; unless you are really low on RAM and the system starts swapping, this is mainly about CPU
- double scanning - first, the browser doesn't have to store everything into its cache; second, the AV doesn't have to scan every file being written to disk - may be e.g. extension dependent (and different file types may be scanned in web shield and in file system shield)

And third, everybody seems to think that malicious files have to be written to disk to perform any damage - but it's simply wrong. OK, maybe it's how it works today, possibly because malware authors didn't try hard enough to bypass that - but it's possible that a browser exploit appears and a piece of malware will abuse that problem - purely in memory. Fine, being just in memory, it won't be able to persist on the system... but it might send our your personal data at least, before it gets killed. Or it may try to disable your AV - and then write itself to the disk, when nobody watches that anymore.
Title: Re: Disapointed with Avast's impact on speed
Post by: zerotox on December 13, 2010, 01:21:51 PM
I agree with you. The quote about double scanning doesn't apply to all Av-s, it is not specified. Of course you can exclude file types from scanning - that's convenient. But nevertheless the fact is that there is delay, even if minimal - its extent varying for different users/set-ups. I agree that nowadays RAM is rarely an issue. As to the exploits and drive-by-s that can execute directly in memory without the need of being downloaded to the hard disc, of course that is a possibility but Sandboxie or Geswall (both with free versions) will be better options in this case as even the web guards of AV-s depend on signatures or a list against which pages and content is checked. So no signatures - no detection.
Title: Re: Disapointed with Avast's impact on speed
Post by: scubadoo on December 13, 2010, 01:23:36 PM
I'm really impressed with the enthusiasm of this forum's members.

Safesurf & Zerotox, I was using Avira's free version and I fully appreciate that the more things a package has to do, the greater will be the impact on speed but I certainly don't consider a reduction in speed of 30-40% as a "slight" slowing down.
As I've said already, I'm no expert; I want something that'll download/install easily and give me a similar level of protection to what I'm used to without having to fine-tune it.
As each company/developer seems to use their own versions of tech-speak and calls their various modules by different names it tends to confuse those of us (me at least) who aren't experts and who assume company A's free package will be very similar to company B's free package.
From your posts, it seems this isn't the case; Avast has more bells and whistles than Avira?
Oh, and sorry DavidR, I mistook your comment on the absence of web protection to mean in Avast not Avira - many apologies.

So, as a complete numpty, am I to assume that if I used Avast with WebShield off, I'd still have a 'similar' level of protection to Avira free?
Title: Re: Disapointed with Avast's impact on speed
Post by: zerotox on December 13, 2010, 01:28:39 PM
IMO in this case Avira will be a better option as it has better detection rates and better heuristics. If you can live with the interface and nag screen.
Title: Re: Disapointed with Avast's impact on speed
Post by: YoKenny on December 13, 2010, 01:38:34 PM
IMO in this case Avira will be a better option as it has better detection rates and better heuristics. If you can live with the interface and nag screen.
It has a terrible forum and one of the main reasons I am here.

They do not like you to run anything other than Avira and will not help you unless you remove what they do not like like WinPatrol and Malwarebytes Anti-Malware (MBAM).

By the way I purchased Avira AntiVir Premium just to get rid of the nag screen. 
Title: Re: Disapointed with Avast's impact on speed
Post by: zerotox on December 13, 2010, 01:42:36 PM
Well the OP asks about the product not the forum. Otherwise I agree that this forum (Avast's) is one of the best concerning support and friendliness.
Title: Re: Disapointed with Avast's impact on speed
Post by: CraigB on December 13, 2010, 02:17:11 PM
You also have a high rate of false positive's with avira and the detection rate's compaired with avast are virtually on par, a difference of about 1-2% in real world use so for the sake of this minimal percentage with less false positive's and a far better forum avast is the winner hand's down imo, sorry to break your bubble zerotox :)and if i was to have a second choice it would be MSE.
Title: Re: Disapointed with Avast's impact on speed
Post by: YoKenny on December 13, 2010, 02:48:27 PM
You also have a high rate of false positive's with avira and the detection rate's compaired with avast are virtually on par, a difference of about 1-2% in real world use so for the sake of this minimal percentage with less false positive's and a far better forum avast is the winner hand's down imo, sorry to break your bubble zerotox :)and if i was to have a second choice it would be MSE.
MSE would be my second choice as well.
Title: Re: Disapointed with Avast's impact on speed
Post by: schmidthouse on December 13, 2010, 03:44:48 PM
Well, the quote is kinda questionable.
I mean sure, something is being scanned, so it has to have some effect - no arguing about that. But:
- don't see what RAM has to do with that; unless you are really low on RAM and the system starts swapping, this is mainly about CPU

I couldn't agree more...I mean, I don't have a "Big Hemmy" under the hood in my systems(as you can see by my signature)and I do definitely see some slow down, and I can understand for those with less powerful CPU's, how frustrating the slowdown can be at times....However the point made by SafeSurf about safety vs speed is THE POINT. We use these software programs to stay protected and for me....it is a trade off I am 'definately' happy to make ;D
And about this forum...with the help and support of the evangelists and product users...you can't go wrong! ;)
Title: Re: Disapointed with Avast's impact on speed
Post by: Hexo on December 13, 2010, 04:19:00 PM
Have anyone ever test the webguard of avira?
I was an Avira IS custumer for a long time, but the webguard worked never really good. Since the releace of the Webguard i have to disable it, because of terrible i-net slowdown!
If someone try to compaire both productes... he has to compaire Avira Premium and Avast Free!
Never compaire Avira Free with Avast free.
Title: Re: Disapointed with Avast's impact on speed
Post by: Lisandro on December 13, 2010, 09:32:51 PM
IMO in this case Avira will be a better option as it has better detection rates and better heuristics. If you can live with the interface and nag screen.
A worse update scheme, a worse number of servers for free updates, a worse interface, lack of configuration.
Title: Re: Disapointed with Avast's impact on speed
Post by: SafeSurf on December 14, 2010, 12:48:35 AM
I will try and clarify and answer your questions:

I want something that'll download/install easily and give me a similar level of protection to what I'm used to without having to fine-tune it.
Avast is simple to download and install, and we suggest using default settings...no fine tuning needed.  The GUI is simple and user-friendly.

Avast has more bells and whistles than Avira?
When comparing Avast Free to Avira Free...yes.  Look at the comparison charts:
- Avira_Free:  http://www.avira.com/en/avira-free-antivirus (http://www.avira.com/en/avira-free-antivirus)
- Avast Free:  http://www.avast.com/comparison-chart (http://www.avast.com/comparison-chart)

<snip> am I to assume that if I used Avast with WebShield off, I'd still have a 'similar' level of protection to Avira free?
No.  You would have still have more protection using Avast, but the Web Shield is important.  See the comparison charts (links listed above in this post) and you will notice that your email and other items are also not protected using Avira Free.  I would not recommend disabling the Web Shield for security reasons, especially with all the malware/viruses out there today.

You need to decide how much protection you want and how much risk are you willing to take.  If you only go online to httpS sites for a short period of time,  rarely use email and do not open attachments, do not store anything on your machine, do not do any financial or personal transactions online, and you are willing to take the risk...this is your machine and you need to make the decision.  We are here to help educate you from our experience with other people who have transitioned over from other AV's or users we have removed malware from their machines.  Ultimately this is your decision, and we are happy to answer your questions.

And yes, we are a lively, friendly forum.  :)
Title: Re: Disapointed with Avast's impact on speed
Post by: YoKenny on December 14, 2010, 02:44:01 AM
IMO in this case Avira will be a better option as it has better detection rates and better heuristics. If you can live with the interface and nag screen.
A worse update scheme, a worse number of servers for free updates, a worse interface, lack of configuration.
The number of servers for free updates are very limited.

avast! V5 is very configurable and V5.1 due out very shortly will have much more configuarability.  
Title: Re: Disapointed with Avast's impact on speed
Post by: zerotox on December 14, 2010, 09:10:43 AM
Well, I know that every forum promotes its own solution - that's normal everywhere but I think you bombarded the OP far too much, sometimes repeating what the previous poster have said. He asked a simple question - will Avast without the webshield be equal to Avira Free and I only stated that it won't be detectionwise. All other bells and whistles and shields are in favour of Avast and that's a fact. So the OP should consider exactly what he would like to have or trade for. Even in the review of PC World, where Avast is ranked the 1st among free AV programs, it is stated that if it comes strictly to detection - Avira is better but without doubt Avast free is better overall. I know that it's Avast's forum but it will only benefit from ballanced opinions.
Title: Re: Disapointed with Avast's impact on speed
Post by: SafeSurf on December 14, 2010, 09:29:42 AM
We have given the OP information and links to review and it is up to her/him to decide what they feel is best for their machine.  Should the OP have any additional questions, I'm sure they will ask.
Title: Re: Disapointed with Avast's impact on speed
Post by: scubadoo on December 14, 2010, 09:44:35 AM
Thanks everyone, hope I didn't cause too much friction but if nothing else you've proven that Avast's forum support is first class and you've highlighted some of my misunderstandings.
I think I'll try reverting to Avast, I suppose I can always temporarily turn off Webshield if doing much heavy downloading.
And, as said, the much more reliable update procedure is certainly worth having.
 :D
Title: Re: Disapointed with Avast's impact on speed
Post by: zerotox on December 14, 2010, 10:22:57 AM
Good luck, Scubadoo! And you can always count on this forum, as people here are always quick and glad to help.
Title: Re: Disapointed with Avast's impact on speed
Post by: jwall on December 15, 2010, 03:26:55 PM
I have been going back and forth between avast and avira also.  I'm currently using avast.

I left avira because of memory leak problems (now supposedly fixed) with XP.

Yes, avira probably has SLIGHTLY better detection and speed, but avast on my system with three shields running (web,file,and network), I barely notice any performance hit and I have old PCs.
Also, with three shields running, avast uses FEWER rescources than avira free does with only its guard (file shield) running.  Avira free DOES NOT have a web guard.

Also, avira free, version 10.0.0.607 DOES NOT have the pop up nag screen anymore.

Just some FYI.