Constant CPU usage even while firefox is "idle" #59

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xapaho opened this Issue Nov 23, 2012 · 9 comments

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xapaho commented Nov 23, 2012

Constant CPU usage even while firefox is "idle"

Looking at top while firefox is running, but not being used :

  • If YSlow! is installed and enabled, usage is constantly around 4 to 5% minimum, typically 4.3%.
  • If YSlow! is not installed, or installed but disabled, typical cpu usage is 0.3% -- as expected

YSlow 3.1.4
firefox-16.0.2-1.fc16.x86_64

xapaho commented Nov 23, 2012

NB. reproduced with a fresh profile and any system plugin disabled just in case, "of course" :s

Having the same isssue with Firefox 21.0 and YSlow 3.1.4.

I tried open only one empty tab in Firefox and with only one extension YSlow, top shows Firefox is using about 10% of cpu, after disable YSlow and cpu usage of Firefox is dropped blow 3%.

Owner

marcelduran commented May 16, 2013

Does the same happen with another Firebug extension rather than YSlow?

@marcelduran

On Thu, May 16, 2013 at 3:48 AM, machixian notifications@github.com wrote:

Having the same isssue with Firefox 21.0 and YSlow 3.1.4.

I tried open only one empty tab in Firefox and with only one extension
YSlow, top shows Firefox is using about 10% of cpu, after disable YSlow and
cpu usage of Firefox is dropped blow 3%.


Reply to this email directly or view it on GitHubhttps://github.com/marcelduran/yslow/issues/59#issuecomment-17994035
.

@marcelduran No, I have Firebug 1.11.3 installed, idle Firefox cpu usage is below 3%.

BTW: I'm using Mac OS X 10.7.5

Owner

marcelduran commented May 16, 2013

Could you please try uninstalling YSlow and installing any other Firebug
extension just to make sure who (YSlow or Firebug extensions in general) is
causing this increase.

@marcelduran

On Thu, May 16, 2013 at 9:10 AM, machixian notifications@github.com wrote:

@marcelduran https://github.com/marcelduran No, I have Firebug 1.11.3
installed, idle Firefox cpu usage is below 3%.


Reply to this email directly or view it on GitHubhttps://github.com/marcelduran/yslow/issues/59#issuecomment-18011168
.

Just install FireFinder, FireQuery and CSS Usage and cpu usage no noticeable change after restart Firefox.

And I enabled YSlow once again, and cpu usage is back to 10% again after restart Firefox.

Owner

marcelduran commented May 16, 2013

Does this 10% stick forever or only during browser/firebug startup?

On Thursday, May 16, 2013, machixian wrote:

Just install FireFinder, FireQuery and CSS Usage and cpu usage no
noticeable change after restart Firefox.

And I enabled YSlow once again, and cpu usage is back to 10% again after
restart Firefox.


Reply to this email directly or view it on GitHubhttps://github.com/marcelduran/yslow/issues/59#issuecomment-18013104
.

@marcelduran

The CPU usage I'm talking about is stablized CPU usage, not the CPU usage right after Firefox restarted or Firebug enabled or new page opened.

blueyed commented Dec 1, 2013

Same for me, using latest YSlow, Firebug and Firefox 25 on Ubuntu (13.10).
This happens even if YSlow is the only enabled extension (Firebug disabled)!

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