Slowdown with SUMo

[REDACTED]

I did the install script [of SUMo]

@SUMo_User, are you the creator of SUMo?

It would be great if you could investigate what exactly SUMo is doing when Avast! slows it down.

This way it would be easier for Avast! to fix the bug, or maybe you could avoid the problem changing SUMo's behavior slightly.

[REDACTED]

I did the install script [of SUMo]

@SUMo_User, are you the creator of SUMo?

It would be great if you could investigate what exactly SUMo is doing when Avast! slows it down.

This way it would be easier for Avast! to fix the bug, or maybe you could avoid the problem changing SUMo's behavior slightly.

Yes and i would be glad to investigate this issue with Avast technical staff.
I contacted them using the "Support Ticket" I'm now waiting for an answer from them.

[Lisandro]

It is not the normal cost of the protection : No other AV induce such poor overall performances

You're mixing, or, at least, saying I'm mixing, the "cost" of protection that is reducing (a bit, we wish) the performance with a false positive detection. The false positive is always an error, a bug, that should be addressed. It's not a cost.
If we think about technology, the "detection" technology (blacklist) (in opposite of whitelisting or deny all) will always pay the cost of false positives though, as any error - done with good will - will led to a false detection.
Well, technology philosophy 

[REDACTED]

OK

[Lisandro]

By the way, thanks for SUMo. Great piece of software, I use it.

[bob3160]

I use both SUMo and DOMo but haven't noticed any slowdown.

[REDACTED]

Yes and i would be glad to investigate this issue with Avast technical staff.
I contacted them using the "Support Ticket" I'm now waiting for an answer from them.

Great, thanks!

I use both SUMo and DOMo but haven't noticed any slowdown.

Which Operating System do you use?

I have tested those:

OS	PC tested	PC slowdown	PC ok
Win XP	3	3 (100%)	0 (0%)
Win Vista	1	0 (0%)	1 (100%)
Win 7	2	0 (0%)	2 (100%)
Win 10	1	0 (0%)	1 (100%)

[bob3160]

@ Prova,
Windows 8.1 with all updates and Windows 10.

[REDACTED]

@ Prova,
Windows 8.1 with all updates and Windows 10.

OK, this seems to confirm there is no slowdown after Win XP.

Now I'm curious if it only happens with Win XP, or with previous versions too. Does somebody have Windows 2000 to test?.

[DavidR]

@ Prova,
Windows 8.1 with all updates and Windows 10.

OK, this seems to confirm there is no slowdown after Win XP.

Now I'm curious if it only happens with Win XP, or with previous versions too. Does somebody have Windows 2000 to test?.

The latest version of avast 2015 10.0.2208 isn't compatible with OSes prior to XP (SP2 or later), it would be pointless to test on an old avast version as it doesn't have the same functionality. So the same condition probably wouldn't exist.

[Lisandro]

Prova, is your XP fully updated, I mean, even after SP3?
Do you use any other security program that could interfere? Antivirus, antimalware, firewall, etc.

[REDACTED]

Prova, is your XP fully updated, I mean, even after SP3?
Do you use any other security program that could interfere? Antivirus, antimalware, firewall, etc.

Lissandro, i'm facing other issues with AVAST.
See last message of : https://forum.avast.com/index.php?topic=163929.0
Could you please help ?

[REDACTED]

The latest version of avast 2015 10.0.2208 isn't compatible with OSes prior to XP (SP2 or later).

Oh, true, I searched the system requirements and I found it was compatible with Windows 2000, but that was an older version of Avast!.

Prova, is your XP fully updated, I mean, even after SP3?
Do you use any other security program that could interfere? Antivirus, antimalware, firewall, etc.

Yes, I have all updates installed. Well, except those:

• KB2934207 - A notification about the end of Windows XP support. I already know it, I don't want any notification.
• KB940157 - Windows Search 4.0. This crap produces error dialogs.
• Microsoft Silverlight. I don't want that crap.
• Windows Live Essentials. I don't want that crap.
• A graphic driver. I know I already have the latest driver.

And two of the Win XP where I noticed the slowdown where clean reinstalls:

• Install Win XP from legal CD
• Install SP3 and all updates
• Install SUMo and Avast!
• Slowdown.

[REDACTED]

The latest version of avast 2015 10.0.2208 isn't compatible with OSes prior to XP (SP2 or later).

Oh, true, I searched the system requirements and I found it was compatible with Windows 2000, but that was an older version of Avast!.

Prova, is your XP fully updated, I mean, even after SP3?
Do you use any other security program that could interfere? Antivirus, antimalware, firewall, etc.

Yes, I have all updates installed. Well, except those:

• KB2934207 - A notification about the end of Windows XP support. I already know it, I don't want any notification.
• KB940157 - Windows Search 4.0. This crap produces error dialogs.
• Microsoft Silverlight. I don't want that crap.
• Windows Live Essentials. I don't want that crap.
• A graphic driver. I know I already have the latest driver.

And two of the Win XP where I noticed the slowdown where clean reinstalls:

• Install Win XP from legal CD
• Install SP3 and all updates
• Install SUMo and Avast!
• Slowdown.

But SUMo alone without AVAST runs fine, right ?

[REDACTED]

But SUMo alone without AVAST runs fine, right ?

Yes, the culprit is "Scan programs when executing" of Avast's "File System Shield".