Cpu usage stuck @ 100% after Opera 10.52 is opened for about 2 min or so

Cpu usage stuck @ 100% after Opera 10.52 is opened for about 2 min or so

i'm using xp pro sp3

i just downloaded the update of opera in 10.52 and i'm not liking it X[
it seems that after opera 10.52 is opened for about 2minutes or so..

cpu usage is stuck at 100%
[using single core 2.6Ghz amd @ 1gb ram w/ 6 tabs opened]
opera 1.PNG
opera 2.PNG

i have to restart opera when this happens because i can't browse normally and scrolling is bad
right now, while i'm writing this complaint in this forum, scrolling is so worse that i think if opera is a game and i opened fraps, it will be like 7fps

Try deleting or moving operaprefs.ini in your \profile\ folder (Help About Opera to find it) You will lose any changes you have made to preferences, but it might fix your problem.

Something is obviously very wrong with your setup.

thanks for your reply,
i already done what have you said and i'll be observing if the issue has been resolved for me or not..

well.. after observing..
still opera behaves weirdly (consuming 100% of cpu usage)

i catch a screenshot where opera is nearing the state where it consumes 100% cpu usage
opera 3.PNG
then i tried to leave my computer chair and watch tv for about 10min thinking that cpu usage will become normal with no avail
opera 4.PNG
opera 5.PNG

am i the only one experiencing this problem with new opera 10.52 update?

Originally posted by Pesala:

Try deleting or moving operaprefs.ini in your \profile\ folder (Help About Opera to find it) You will lose any changes you have made to preferences, but it might fix your problem.

Something is obviously very wrong with your setup.

I have a very similar issue: 50-100% CPU usage even with no tabs open. I completely uninstalled Opera and reinstalled it (including getting rid of all files in AppData), and no change.

I'm using Opera 10.52 on Windows 7 32-bit.

finally, someone who have the same issue as mine,
i'm kinda relieved but we need a solution for these fast..

i don't want to uninstall opera cause i'm kinda scared if uninstalling opera will remove all my bookmarks, important note files and some password saved to the password wand or whatever its called

Originally posted by mdnpascual:

i don't want to uninstall opera cause i'm kinda scared if uninstalling opera will remove all my bookmarks, important note files and some password saved to the password wand or whatever its called

use opera link to sync all this info. and then do clean install.

I'm also facing a strange behaviour with Opera 10.52. Windows Vista with latest updates in use.

Even there are no any activities going on in a browser, CPU climbs in 4 minutes gradually from 5 percent to 50 percent. Weird thing is that it's the maximum Opera's CPU usage will get. But it also a minimum, it won't go below 50%?

Going back to Opera 10.51...

Same problem here.
Upgraded from 10.51 to 10.52
In my case it also climbs to 50% which I suspect is the same as 100% since I have dual core cpu.
Another thing worth mentioning that might be related, it seems smooth scrolling is no longer "smooth"
It appears to be very jerky as if the computer is struggling to redraw the page.
I have E4400 @2.00Ghz with 2 gigs of RAM and 4350 ATI card.
OS is Windows XP SP3

Ok sorry about the last remark (downgrade didn't help in my case).
Another thing worth mentioning is that it seems the thread that causes high cpu usage is constantly calling to OpSetLaunchMan() function in opera.dll

same here, after upgrading to 10.52 yesterday, opera stucks always with 100% cpu usage even with no or empty window open.
No problems with cpu usage, when opera is offline.
AND! There is always background traffic even with empty window!
Why? And why wants opera 10.xx to open ports on my router? The previous versions, 9 and below, didn't do this.

bump my problem x[

Originally posted by mdnpascual:

bump my problem x[

Try the newest RC, currently 10.53 RC1

http://my.opera.com/desktopteam/blog/2010/04/28/opera-10-53-rc1-for-windows-and-mac

I downloaded Windows MSI package, installed it and everything runs smoothly now. Try it and report if the problem disappears?

Did anyone find a way to reproduce this problem reliably? Does it help to run with a clean profile? You can do the latter by (while Opera is closed) renaming the profile folders.

On Windows XP, these are typically:
C:\Documents and settings\username\Application data\Opera\Opera\
C:\Documents and settings\username\Local Settings\Application data\Opera\Opera\

On Windows Vista/7, these are typically:
C:\Users\username\Appdata\Roaming\Opera\Opera\
C:\Users\username\Appdata\Local\Opera\Opera\

After you perform this test and if it solves the problem, you can copy files like bookmarks.adr from the renamed (backup) folders back to the new folders that Opera will have created (while Opera is not running). If you find that after moving back the operaprefs.ini file the problem shows up again, I'd like to see it.

Same issue--after 10.52 install, would start out loading pages normally and within a couple minutes slow to sub-modem speeds. 10.53 install fixed it.

Originally posted by Rijk:

Did anyone find a way to reproduce this problem reliably?

No. I tried several methods, disabling JavaScript, addons and so on. (well, I didn't drop off my mailboxes and didn't try clean install. Just too lazy...). Many guesses what could cause this - maybe a Opera's own update tool (the way I installed O10.52) couldn't update all files, insufficient rights? It's my best guess...

Originally posted by Huerzo:

Originally posted by Rijk:

Did anyone find a way to reproduce this problem reliably?

No. I tried several methods, disabling JavaScript, addons and so on. (well, I didn't drop off my mailboxes and didn't try clean install. Just too lazy...). Many guesses what could cause this - maybe a Opera's own update tool (the way I installed O10.52) couldn't update all files, insufficient rights? It's my best guess...

Uhhh..bad news guys, problem came back...I try the method described couple of messages ago and tell what happened.

Been Opera user since Opera 6 (2001, OMG it's been a while) and this is the first time something this bad has happened...

EDIT: At least after a small surfing session CPU usage was normal, so it could be something to do with old preferences/files whatever...

So guys, do you recommend trying 10.53?

OK scratch that
I did the update and apparently the problem is still there.
CPU is climbing after opening/closing some tabs (I stopped when it reached ~20%)

Originally posted by matrix200:

So guys, do you recommend trying 10.53?

Well, in fact Rijk got it right from the start.

1) Close Opera
2) Do the steps he adviced couple of messages earlier
3) Start Opera again and close it

Now you should have two Opera directories d:\Users\huerzo\AppData\Roaming\ (in my case, check your own directory structure), I have Opera and Operay. In my case in a Opera directory is the "clean" install where Opera created new preferences etc. after it noticed there were no settings files available. Operay is directory where my old settings file are (backup directory Rijk adviced to have).

4) Open folder where operaprefs.ini is, in my case directory was d:\Users\huerzo\AppData\Roaming\Opera\Opera
5) Copy the "clean" operaprefs.ini file to your desktop for a next step.
6) Backup your real operaprefs.ini file, which in my is in directory d:\Users\huerzo\AppData\Roaming\Operay\Opera
7) Overwrite your old operaprefs.ini with "clean" operaprefs.ini file
8) Start Opera again, it should work now like a charm

For Rijk: is there a email where I send my old operaprefs.ini which somehow causes the problem?

Ok I will try that in a few.
Will report back if it helps
That means I guess that I will have to recreate all my settings right?
Like I use IE6native skin to make it look like IE6 , I will probably have to reinstall that right?

Originally posted by matrix200:

Ok I will try that in a few.
Will report back if it helps
That means I guess that I will have to recreate all my settings right?
Like I use IE6native skin to make it look like IE6 , I will probably have to reinstall that right?

If I got it right all the buttons and fields are restored to their OOB locations. But it's quite easy to set them back.

But skins should be at least available without downloading. Of course the OOB settings show the default skin but the look you seek is just couple of clicks away.

And yes, running Opera over 2 hours with a standard (low) CPU load.

Ok thanks Huerzo
SO far looks like it worked.
After replacing operaprefs with the empty one somehow the skin got back without me doing anything.
I opened and closed a few heavy websites and even played a youtube video which took my cpu usage to 10% but it was back to ~0 after the video finished playing
If anybody is interested I am also willing to send the bad operaprefs.ini which was causing the cpu spike.

EDIT:
One more thing that I would like to mention.
I noticed the cpu goes up quite a bit (23%) if I am scrolling alot back and forth on a long page.
Not sure if it is a problem since I never really had process explorer running with opera until now.

Rijk solution works like a charm

Arigatou gozaimasu

Just reporting in:
Same problem, same solution. That is to say, I do NOT have any problems now. INI file (will be) made available for viewing as requested.

Details:
Max CPU usage after a while, and stays so even after closing all tabs. Did a little experiment and went through opera:config , resetting every single thing to default. Didn't help.

I have the same issue, just created a new topic "10.52 runs like a dog", and then noticed this thread.
I had the Task Manager open, then shut down Opera, restarted it and found this thread.
While reading it I noticed the CPU utilization rising, I'm currently back at 100%

Opera 10.52 build 3370

I installed the 10.53 from the link provided above, no good. Same problem with CPU climbing to 100% after sever minutes of use.

After installing 10.53, with no improvement, I then renamed the operprefs.ini file, still no good.
Just opening Opera and letting it sit at the speed dial screen, do nothing, and watch the task manager. Before it scrolls half way the cpu is back up to 100 % .... Just starting Opera fresh, connecting to this forum and typing this note, i'm already pegged at 100%.

Let me point out again, that prior to the automatic update to 10.52 a couple of days ago, this was working GREAT, now it's good for maybe 2 min then you're pegged out.

Since the upgrade to 10.53 didn't do any good, I dropped back to 10.51, that also didn't work. <sigh>
I then installed 10.53 into a new directory, losing everything I had configured. However, it now worked, a good sign.
I then copied the operaprefs.ini from the new directory back to the original directory. The original Opera now worked.
Since it was at 10.51, I ran the upgrade to 10.53, and it still worked (amazing).
Seems the answer is to copy a new operaprefs.ini to the opera that's failing, I doubt that going back to .51 had anything to do with it.
The automatic update check box is now OFF, future updates are questionable, an update shouldn't screw everything up.

same problem here,
when i open opera it stays CPU at 100% but the process wich uses 100% CPU is not opera.exe, is "system"
it keeps a longggggg time with CPU at 100%

closing Opera dont helps, in fact, i can wait about 15 minutso until the CPU got normal levels, then i close opera, and again PCU to 100% and it keeps at 100% fvor a long time.
Is frustrating.

After wait 15-20 mints so CPU comes to normal levels, i open a new tab and browse new web and then.. heLL! CPU rise to 100% again for 2minutos or so

I am using 10.53 and problem is not solved.

I am using Win XP SP3, with 1 Gb ram and 1,7 Ghz Penitum M (centrino)




DougA can you upload the file o i can install it in my opera? i am scared to install it in another directory, i always got problems and lost data.

I tried a clean install or back to 10.51, without result. I solved the problem (of a lot of traffic and 100% CPU-Usage) deactivating under safety the automatic update.
Opera 10.53, XP SP 3

what you mean with "under safety" ¿?

Moderator edit: This comment has been removed for breaching our terms of use.

Sorry for my English. Under preference / advanced / security / changing from automatically install to notify me about...

I have on the same PC an other account, same configuration, but on this one I have the same unresolved problem..

Thanks @Jikuu for your ini file (he put it online and sent me the link in a personal message). Remarkable things in this profile were:
* TLS 1.1 was disabled (See Prefs > Advanced > Security > Protocols)
* a proxy server was set

TLS 1.1 should be enabled. I think there are some upgrading scenarios where it might be disabled, or there might be an Opera bug involved.

For those experiencing the high CPU load problem in 10.53 here is
what worked for me. Exit Opera and in the original operaprefs.ini
file (thus migrated from a version before 10.53) locate in the section
[Security Prefs]
the line
Enable TLS v1.1=0

Change its value to read =1

For me 10.53 now works like its previous version.

I remember that many years ago it was recommended to set this to =0.
Nou sure when and why that was. I use Opera since the days it fit on a
1.44 MB diskette !

Good luck
Frank

dissable or enable TLS v1.1 dont make any changes in my computer
what a shame.

i think opera got serious problem of memory management or something, this is not normal at all.
I was fan user of opera from long time ago, but the number of bugs and problems in each new version is always increasing, and make me feel frustrated.

this is not the claimed "faster browser in the earth"

If the cause of the problem is TLS 1.1, then the latest snapshot might solve the problem:
http://my.opera.com/desktopteam/blog/2010/04/30/fixing-crash-bugs-for-unix-beta-release

i end up removing opera from my computer
installing it clean, and the problem still there, CPU at 100% full time,

i also tryed the version you just posted Rijk and CPU still at 100%

Thanks Rijk, with your proposition to enable TLS 1.1 I could solve the problem also on the other account.
Strange: on my first account the traffic to the router drop by deactivating the automatic update (TLS 1.1. was disable), but only in the other account your proposition could solve the problem.

i solved the problem here, looks like in my last try i did not uninstall opera fully.
now i removed any folder of opera and then install it clean.

now it works.

I must say i found a folder of 11 Gb !!! inside the caché folder, it took me about 2 hours to remove the thousends of *.tmp files inside.
how the hell can this be posible if the limit i got was 20 mb of caché?

As an opera fan user, i want say i lost more time crashing my head to find solutions to opera problems than enjoying the web,
hope programers work a bit harder, because each new version i try, then i get more problems than solutions, and just a quick look in this forums shows i am not the single one,

I also had abnormally high CPU use. I closed Opera, renamed operaprefs.ini to make opera create a new .ini file, reopened opera and the CPU prob was gone. I however did not feel like redoing all of my customizations, so I undid the whole process, deleting the new operaprefs.ini file and reverting to the old one.

Now all is back to normal, and the CPU prob seems to be gone....

Go figure.

Changing the Enable TLS v1.1 value to 1 fixed this for me.

I also got these problems (started with approx 10.52, continued with 10.53) and enabling TLS 1.1 seems to help.

Had the same problem since the day I updated to 10.52, and throughout the 10.53 upgrade.
I had TLS 1.1 enabled all along, so that didn't solve the high CPU usage. Nor did the renaming of "operaprefs.ini" and letting Opera reset its preferences.

The only thing that got my CPU usage down to normal was a complete uninstall of Opera (with manually deleting all left-over files from "Program Files (x86)" and the various folders inside "Users" > "AppData" > "Lolcal" / "Roaming" etc.), and a clean reinstall of version 10.53.


[next-day edit] - Strike that, the CPU-lag spikes are back, even on the clean install, and without making any changes from yesterday

I tested a bit more, trying to figure out what triggers the CPU usage spikes in the first place, but I still can't find a specific pattern.

After the first time that a CPU usage spike happens, almost any action within the browser seems capable of triggering another spike. Even after closing Opera, deleting the "Opera" folders in "Users>...>AppData>Local" and "...AppData>Roaming", and starting Opera again with clean .ini files.

The spikes last for roughly 1-2 seconds, but sometimes even more, possibly due to consecutive spikes with no "breather" in between them. When they happen, Opera's CPU usage in Windows Task Manager goes up to ~50% (on a dual-core CPU), and while it lasts, the whole application is completely stuck and unresponsive. Since this can happen every other 10 seconds (sometimes less, sometimes more, depending on how "intense" my browsing activity is), it leaves me with a very annoying browser for my online work. I really don't want to quit using Opera, but I can't keep using it in its present state either

Anyway, some examples of actions that can trigger subsequent CPU usage spikes:
- opening new tabs (Opera doesn't respond to any action during the spike, can't even switch between older tabs)
- closing a tab
- scrolling thrown a page, even if it's already fully-loaded
- hovering over links, especially if they're positioned far from each other on the page (e.g. different DIVs / containers?)
- switching between- (or hovering over-) different FORM fields

Again, these are only a few examples of triggering actions, and all this happens to me even on a clean Opera 10.53 install, without any sync from My Opera custom settings and such. Also, TSL v1.1 was enabled all along, no proxy servers are set, no plug-ins, Opera Turbo disabled, Opera Unite disabled; just a standard, clean install. I get this kind of behaviour even when 1 single tab is open, on a very simple page with no Flash, no animated images, no "active" scripts that could run code periodically, just the most basic kind of HTML code.

My system is Vista Ultimate SP2 64-bit fully updated, on an AMD Athlon 64 X2 Dual Core Processor 5200+ (two cores at 2.70 GHz). As I mentioned in my earlier post, the CPU spikes firt began after the 10.52 automatic update, and I've been having them ever since.

p.s. Strangely enough, though, some actions never seem to trigger a CPU spike. For example, hovering over some closely-positioned links may never trigger a spike, but as soon as I start hovering over the entire page (or more distant links / form fields), I get spikes again.

p.p.s. Also, I can't find evidence of any Network activity specifically linked to the CPU spikes.

I am leaving Opera after more than 10 years. Migrating to Google Chrome. Sad.

FYI,
In my case setting TLS 1.1 via opera:config did not stick. I had to change it in ini by hand (bug?).
It seems the high CPU usage was triggered by presence of flash on opened pages, but I am not sure here.

i don't think it is opera itself but the plugins,try pressing F12 and uncheck enable plugins then restart opera, if a certain sies does not work try setting plugins for that certain site.

installing opera 10.53 and manual deleting the user related folders did help. I only backup the bookmark.adr.
CPU and memory usage seems comparable to firefox now, although I find version 10.53 a little bit more sluggish than 10.51.
Thanks!

I saw soldier1st's suggestion to disable plugins and restart Opera. Gave it a try. Did not help. Opera now uses appr. 50%. I have a dual processor CPU.

I had the same problem with Opera consuming 100% of my CPU core usage, but I think I just found a quite simple fix for it. If your Memory Cache is set on "Automatic" (Preferences > History), try setting a limit for it automatically to what you think is appropriate for your machine.

I really don't know why that would affect CPU usage, but for some reason it obviously does, as the problem seems to be fixed for me now. Too bad I have a ton of other weird bugs to solve after the latest Opera updates, but at least now I think I'll still stick with Opera for a while longer.

I too have 100% load on one core (Quad E8400) after 5mins or so. Using Opera then gradually becomes more and more sluggish, Flash clips drop to 3-5fps, sites load painfully slow and Opera buttons are highlighted half a second or so after pointing at them with the mouse...

I tried tinkering with the TLS and Memory Settings, none worked. Still shying from completely removing Opera and install fresh due all of my customization and one poster wrote it did nothing for him.

I updated from 10.10, which worked well thus I waited so long

I've been experiencing the high cpu symptoms also on XP sp3 on 10.51 and 10.53 . The only thing that works is to shutdown Opera and start it up again. My cpu seems to be more random in that it takes while for it to reoccur. It may be days and I cannot say what is triggering it to occur. I have used MS sysinternals process monitor to capture some info while the cpu usage is high. I'm not sure what it is telling me. I did not notice the hard drive being accessed when the cpu was high. Here's some info at the beginning of the monitor in the attached files.opera using cpu 05062010.txt

I let run Opera idle after start (just showing the speeddial) but after ~7mins, one CPU is at 100% again (opera.exe).

cpu_1.jpg

At this moment, Opera is nearly unusable for me.

Hello everyone,

I had the same issue with CPU usage. After starting opera I can watch opera consume more and more RAM up to 500 MB in Task Manager. CPU usage is also up to 100% when it reaches 500 MB RAM.

Yesterday Antivir found some HTML virus in operas dcache4.url. I let it delete the file. Opera reported an error, but started after another try.
Now opera behaves fine again. Running for an hour with constant memory usage around 200 MB and 0% cpu usage when left idle.

I think the dcache4.url might have gone bad overtime leading to some kind memory leak when opera is parsing the file.
Unfortunately I cannot reproduce this, since the old dcache4.url file was permanently deleted.

My machine at work still has the same mem/CPU usage issue, but I can't test this till monday. Maybe someone else can verify this?

Cheers

I went back and looked at the sysinternals trace and a couple of things caught my eye.
I was seeing over 3300 entries in a 1 second period for QueryStandInformationFile, WriteFile, ReadFile entries
in the ...\Application Data\Opera\Opera\vps\0010\wb.vx and vx-j files. This also seemed to go on doing this
for the next second but I quit counting.

seeing 4000+ entries hitting the ...\opera\cache\.. files with QueryOpen, CreateFile, QueryAttributeTagFile,
SetDispositionInformationFIle, CloseFile pattern grouped together. This looked to be over 5 seconds .

Ok, I deleted the

operaprefs.ini

in

C:\Users\*MYACCOUNT*\AppData\Roaming\Opera\Opera

and that seems to have solved the issue. I have Opera running for ~1hour now, no problems with high CPU load, the browser is fast and responsive and I can watch flash movies with no problems.
I will continue watching the task manager... hopefully the problem is solved at least for my system.

(btw deleting the above file did not cost me as much Opera customization as I had feared...)

same 100% cpu usage problem with 10.53 on win2000

tls 1.1 was disabled, just changed it, problem gone right now

in Opera 10.53 TLS 1.1 is enabled by default,also when opera is having high cpu usage use process explorer and see what it says about the cpu usage as something has to cause it.

Originally posted by grimvar:

Ok, I deleted the

operaprefs.ini

in

C:\Users\*MYACCOUNT*\AppData\Roaming\Opera\Opera

and that seems to have solved the issue. I have Opera running for ~1hour now, no problems with high CPU load, the browser is fast and responsive and I can watch flash movies with no problems.
I will continue watching the task manager... hopefully the problem is solved at least for my system.

(btw deleting the above file did not cost me as much Opera customization as I had feared...)

Same for me, the renaming of the operaprefs.ini file has worked. A new file was created by Opera & CPU usage again minimal (yay - I can use Opera again). And the loss of prefs hasn't shown as a problem yet (just had to resent my proxy details so far)

Whatever the bug is Opera needs to fix it though.

Guys, when setting TLS 1.1 remember to verify it's really set. I had to do it in .ini file, because setting via opera:config didn't stick.

You should use the normal preferences dialog to enable TLS 1.1: 'Preferences > Advanced > Security > Protocols'.

Also, not that you don't need to delete operaprefs.ini, just rename it to "operaprefs.ini.backup" or something like that while Opera is not running.

What about those of us who still get the CPU usage bug, even after trying all the tips in this topic? (and then some)

Not that I enjoy nagging about it, but is there fix being worked on for the next version of Opera? Or should we just stick to an older version that works for us until... well, whenever

Originally posted by shaftspice:

Same for me, the renaming of the operaprefs.ini file has worked.

Sad to say this fix was only short lived for me. I'm having the same issue again intermittently where one core builds upto 100% usage (shows as 49-50% CPU usage in task manager in Win XP SP3)


And TLS 1.1 has always been enabled.

Any other bright ideas?

Originally posted by Rijk:

You should use the normal preferences dialog to enable TLS 1.1: 'Preferences > Advanced > Security > Protocols'.

thats what i did without moving or renaming the perfs file, and its still working.

Originally posted by shaftspice:

...having the same issue again intermittently where one core builds upto 100% usage (shows as 49-50% CPU usage in task manager in Win XP SP3)

just curious but how do you know the processor is pegged at 100% usage, and its the one the opera process is allocated to?

do you have any config or anti-virus software running that might be routinely overwriting changes to files?

i tried all advices - still the same (

clean install, then restored mail folder, bookmarks, cockies , contacts and hello 100% again :-E

win 7, last snapshot

upd. without my mail folder there is no such bug. so it could be the reason. my mail = 2 google accounts and several rss

i wonder if its a problem with handling configuration info, because after some additional testing my install, i found certain things are not always saved - like content blocking sites.

Very long term user here (since Opera 3). I've held off on upgrading the browser till I had to so I've only done opera 3,5,7 & 9. Today I opted to try 10. I hit 50% CPU on my dual core instantly and can't use gmail and even my TEXT based websites are having difficulty loading.

I've reverted back to 9.64 and I'll subscribe here in the hopes this is resolved sometime. (Other then the reversion, I've always done "upgrade" installs.)

Hi,
First post here.
This was also affecting my setup (10.53 on XP-pro, InterCoreDuo, 2GHz, 2GB). I changed the setting of automatic update, while there was max CPU for the opera.exe process (50% on a duo core), from automatic to notify (Setting -> Preferences -> Advanced -> Security). Directly the cpu load of opera.exe dropped to some 2%. It has not peaked anymore.

Maybe works for you guys too.

MaBo

Too early call...

It is still occurring, unfortunately.

MaBo

OMG, thank you thank you! I've been using Opera since version 5 or so. After I upgraded from 10.10 to 10.53 on my WinXP PC*, Opera was using 50% CPU and the entire browsing experience slowed to a crawl. The trick about enabling TLS 1.1 worked -- but you have to go through the Preferences dialog. Merely changing it in opera:config doesn't necessarily stick.

* In case you see me posting about Mac or Linux, I operate in multiple OSes.

Originally posted by shoover:

The trick about enabling TLS 1.1 worked -- but you have to go through the Preferences dialog. Merely changing it in opera:config doesn't necessarily stick.

We'll fix that, it is some quirk in how these SSL/TLS settings worked together after features got added. I'm not quite sure why people would *not* use the normal Preferences dialog to begin with, but it seems very common in these forums to advice each other about opera:config instead of the normal Preferences.

No CPU spikes since yesterday yet, after upgrading to the "cvasi-beta" build Opera_1060_3422. Would be awesome if it stays that way.

Too early call... again.
CPU spikes are back... again. (2 days after the upgrade from 10.51 to the 10.60 beta)
Back to 10.51... again.
This sure is getting annoying.

Here in Opera 10.61 it does not actually happen, but opera still uses lots of lots of memory. (244'384 KB)

Achievement Unlocked:

Reviving an old Thread.

Almost half a year later, CPU spikes are still occuring.

One pattern that has emerged, after all this time, is that the spikes *seem* to be triggered by very large-sized pages (let's say 1 MB of actual code, not counting images or other media).

Currently using Opera 10.62 build 3500, with spikes occuring on two separate machines (both running Vista, but that's about the only thing they have in common).

I get spikes from Sync (when it syncs). Sometimes it locks up the browser

A "classic" example of a very large page, code-wise, that triggers CPU spikes (e.g. when scrolling frantically through it) is the index page of http://www.mmo-champion.com/

Went back to v9.64 (from v10.5x) b/c of the 100% CPU issue.
Now, I am traumatized and hesitant to try v11 (future?).
Quality seems to have gone downhill since v10.

CPU spikes *still* occurring, over 1 year later! Yeah, even in Opera Next -.-

mmo-champion.com has since switched to a new version that doesn't seem to trigger them anymore.
However, I still get them in a backend admin panel that I'm using for some of my websites. Granted it's self-coded, but surely it can't be THAT badly coded, to explain the CPU spikes - since they don't occur in Opera prior to (and including) version 10.51, nor in other browsers.

What's on you page?

I have a page with several giant "thumbnails" (as in, 3000x2000 images shown at "thumbnail" size) that does this in Opera 11.x for Windows, but is fine in Opera for Linux and older Windows versions. Does your page have something like that?

The same what I do have on Opera 11.52.

I have 4 big email boxes (IMAP) though.

50% load (one processor core). After closing Opera is not closing and cannot be run anymore until I kill processor-eating process in the Process Manager

I had the same problem, and solved it by deleting over 65500 files in the folder
C:\Documents and Settings\[name]\Application Data\Opera\Opera\sessions

WinXP, Opera 11.52, NTFS