Avast WEBforum
Consumer Products => Avast Free Antivirus / Premium Security (legacy Pro Antivirus, Internet Security, Premier) => Topic started by: Alievitan on September 08, 2011, 01:04:41 PM
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I just noticed that there was a new Avast update, and now Firefox is supported by script shield. My question is does Script Shield have a significant performance overhead? I was wondering Avast script shield stats is numbering in the thousands of numbers of script it scanning and increasing? That a lot of real time scanning so I am wary that it is affecting performance on my low powered netbook.
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I certainly don't notice it.
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I certainly don't notice it.
Others stated (including Vlk) that it can depend on the visited site.
Can't check it, as the SS isn't working here. ;)
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Lucky I guess SS works for me and in my day to day browsing I don't notice any real drag and I certainly don't monitor adverse cpu activity, but what I see in front of my eyes whilst browsing.
I don't visit many media heavy sites though and I also have firefox with NoScript, so that would stop some javascript being activated in the first place ;D
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I don't visit many media heavy sites though and I also have firefox with NoScript, so that would stop some javascript being activated in the first place ;D
As you, I'm also on NS, therefore I have no problwm, if the SS doesn't work.
Further, NS doesn't slow the system down. ;)
PS: I might start a topic out of interest, though - let's see.
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It depends on how script heavy is the page.
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It depends on how script heavy is the page.
Can you provide me with an example so I can check? Or the prior forum post on the subject, b/c I couldn't find them via the forum search.
Also for those mentioning noscript, just my humble opinion, I never liked NS b/c it was whitelist/lockdown based and required constant user interaction.
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It also depends on the browser you're using. It doesn't slow Chrome down at all because it doesn't work there. ;) I haven't noticed it slowing down IE9 on Win 7 64 bit though and it does work in that scenario.
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I'm also using IE9 and script shield isn't slowing it down.
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It shouldn't cause any more slowdown than the Web Shield, right?
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It depends on how script heavy is the page.
Can you provide me with an example so I can check? Or the prior forum post on the subject, b/c I couldn't find them via the forum search.
Here it is, the quote of Vlk, the forum's moderator:
Script shield slows web page loading in IE9. I uninstalled the script shield and all is well again.
Absolutly no problem with slow page loading in IE9 on my Windows 7 system. :)
Running fine on both of my systems. ;D
It really depends on the actual page. Some pages are very JavaScript-intensive, and there may indeed be some slowdown there...
Thanks
Vlk
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I just updated to 6.0.1289 and Firefox (3.6.22 on Windows XP) has become very, very slow.
Browser becomes unresponsive, I can see the Avast icon spinning. When it stops, the browser becomes responsive again, but this has been consistently 30 to 40 seconds and very frequent.
No problems before the update and no problems with Internet Explorer.
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I certainly don't notice it.
+1 :)
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I just updated to 6.0.1289 and Firefox (3.6.22 on Windows XP) has become very, very slow.
Browser becomes unresponsive, I can see the Avast icon spinning. When it stops, the browser becomes responsive again, but this has been consistently 30 to 40 seconds and very frequent.
No problems before the update and no problems with Internet Explorer.
My advice get rid of Firefox 6.x and replace it with Firefox 7.0 Beta 5 (the latest 7.0 beta). My experience with 6.x was that it was not a very good release. I am using 7.0 Beta 5 and IMO it is a lot better than 6.x. Just saying :)
P.S. IMO 7.x is the best and fastest Firefox yet. Also does a lot better in minimizing memory leaks which has been a long time problem with Firefox.
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I just updated to 6.0.1289 and Firefox (3.6.22 on Windows XP) has become very, very slow.
No problems before the update and no problems with Internet Explorer.
My advice get rid of Firefox 6.x
FF 3.6.22 is not the same as FF 6.x. Script shield is not working with FF 3.6.22, according to Asyn's report.
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I've upgraded Firefox to 6.0.2 and that seems to have solved the problem. Thanks for the help.
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I've upgraded Firefox to 6.0.2 and that seems to have solved the problem. Thanks for the help.
That's good to know! :)
So will Asyn!
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Since about the last two weeks I've been seeing Firefox 4.0 freezing up while watching Youtube videos. So I updated to 6.0.2 and things haven't changed. The freezing up would start when a video has started to play for about 30 seconds and the strange thing is that the audio continued to play, only the video didn't. Also FF stopped responding at all. This lasts for about 10 seconds, sometimes longer. I couldn't see any pattern to when the freeze lasted longer. It made no difference if the the video were already completely downloaded or still downloading.
Then I started letting the Task Manager run parallel to FF and watched what was happening. When the freeze started FF suddenly went to between 15 and 20% CPU activity and AvastSvc.exe to about 5%. I also looking into the Avast Real-Time Protection and saw that corresponding exactly to the freezes Script Shield was running and reported 'Last script scanned' to be:
c:\Documents and Settings\{user-name-changed}\Application Data\Mozilla\Firefox\Profiles\hmj6ncgs.default\extensions\{e0204bd5-9d31-402b-a99d-a6aa8ffebdca}.xpi\components\cookie-jar-selector.js
which belongs to Torbutton 1.4.3 (https://www.torproject.org/torbutton/).
I've had Torbutton installed for several months, but never had this behavior before a couple of weeks ago.
I also noted that while on YT in My Account - Subscriptions, if I hovered the mouse pointer over a link to a video, the same thing would happen. I generally open the pages to videos I watch in this manner. If I hover over a link to a video in the main page this doesn't happen, so it may have something to do with YT prefetching and preparing to update a cookie, although it doesn't use cookies to keep track of which videos I've already watched, because if I switch to Google Chrome, the videos I've watched markings are all up to date.
Also, just while entering this post using FF with YT open on another tab SS has scanned the above script freezing FF.
If I disable Torbutton, the freezing doesn't occur. But the Torbutton add-on is actually only active if the button is pressed, so if it is not, which is the default and the case during all of the above, it should not be doing anything, including even looking at the above script. I'm not saying that it isn't, but that it would be rather odd if it were. Also the cookie-jar-selector.js script is only 21,466 bytes in size, so I wouldn't imagine that SS should need 10+ seconds to actually scan it. But that's just my speculation.
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So will Asyn!
No, he won't. ;D