Adblock slows Chrome beta (50, 51 ...)

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Adblock slows Chrome beta (50, 51 ...)

Postby dhammond » Tue Apr 19, 2016 2:37 pm

I've been noticing a significant slowdown on certain sites since upgrading to Chrome 50 (at least I think it started then). The sites I see the problem on are goodreads.com (logged in) and fivethirtyeight.com. Disabling adblock makes Chrome fast again. Chrome is just as fast as normal on most other sites. On these sites Chrome shows a huge delay in loading parts of the page and a maxed-out CPU. Is anyone else seeing this problem?
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Re: Adblock slows Chrome 50 on certain sites

Postby mapx » Tue Apr 19, 2016 3:13 pm

I tested the second site, all fine here

Try clearing cookies / cache, test again.
Eventually add these filters:
Code: Select all
||omtrdc.net^$domain=fivethirtyeight.com
||go.com^$domain=fivethirtyeight.com
||outbrain.com^$domain=fivethirtyeight.com
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Re: Adblock slows Chrome 50 on certain sites

Postby dhammond » Tue Apr 19, 2016 4:34 pm

Thanks. Of course when I revisit fivethirtyeight.com now it seems okay without doing anything. That's the one I just noticed this morning. The goodreads.com problem has been persistent and dramatic for me. With adblock off a page takes a few seconds to load, and with it on it takes about a minute. I ran a profile on it and it seems to show a major slowdown in the checkLoaded function in include.preload.js. I'm not sure of the best way to troubleshoot what is actually happening there. Of course it's really only bad on the logged in pages, so if you don't have a login if may be hard for you to take a look.

Image
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Re: Adblock slows Chrome 50 on certain sites

Postby dhammond » Tue Apr 19, 2016 7:22 pm

I do see similar heavy cpu usage on the addElemHideSelectors function when I profile this page on fivethirtyeight.com:
http://projects.fivethirtyeight.com/ele ... emocratic/

It's not as dramatic as on goodreads.com, but it shows over 10 seconds of total cpu time for me just.
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Re: Adblock slows Chrome 50 on certain sites

Postby mapx » Tue Apr 19, 2016 7:29 pm

Do a test: "install" chrome portable + ABP and see if you get the same behaviour.
Test also using the last dev build of ABP.
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Re: Adblock slows Chrome 50 on certain sites

Postby dhammond » Tue Apr 19, 2016 8:27 pm

I see the same problem with Chrome 50 portable, and with the dev build of ABP. BUT I managed to download Chrome 49 portable and I *don't* see the problem there. There is definitely something going on with Chrome 50. I am on Windows 10, by the way.
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Re: Adblock slows Chrome 50 on certain sites

Postby mapx » Tue Apr 19, 2016 10:23 pm

see if helps
Code: Select all
@@||fivethirtyeight.com^$generichide
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Re: Adblock slows Chrome 50 on certain sites

Postby dhammond » Tue Apr 19, 2016 10:39 pm

Yep, that works! Seems to also work for goodreads:

@@||www.goodreads.com^$generichide

I can just use this to solve my immediate problem, though I would be surprised if I'm the the only one who experiences problems like these in Chrome 50.

Thanks for your help!
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Re: Adblock slows Chrome 50 on certain sites

Postby mapx » Tue Apr 19, 2016 10:45 pm

use
Code: Select all
@@||goodreads.com^$generichide
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Re: Adblock slows Chrome 50 on certain sites

Postby mapx » Tue Apr 19, 2016 10:49 pm

I asked a developer if he can see something wrong in chrome 50 + ABP, will see ..
(why that function addElemHideSelectors causes high CPU)
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Re: Adblock slows Chrome 50 on certain sites

Postby crackjack » Wed Apr 27, 2016 5:12 pm

I'm experiencing the same issue on two machines with Windows 7 + Chrome 50 + Adblock Plus
Turning off hardware acceleration in Chrome does seem to help for me
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Re: Adblock slows Chrome 50 on certain sites

Postby pav5000 » Thu Apr 28, 2016 5:17 pm

I'm experiencing this issue even if adblock is disabled for the page. Only global shutting down of the extension helps.
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Re: Adblock slows Chrome 50 on certain sites

Postby mapx » Thu Apr 28, 2016 7:27 pm

if you get a site with such behaviour add a filter like this 1:
@@||example.com^$generichide
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Re: Adblock slows Chrome 50 on certain sites

Postby infiniteg33k » Mon May 02, 2016 7:20 pm

I am receiving the same behavior for every single website I visit with Chrome 50 + Windows 10 + Adblock Plus and on multiple machines.
I just totally disabled it and all of my problems stopped.

I would rather not disable it, as the world looks much different with it disabled, and I'm not a fan.
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