compiz takes >100 of cpu with flash

[SoloTurn]

opening a site using flash, like youtube, makes compiz hog the cpu

 2663 st 20 0 659588 278380 37004 R 176.2 3.4 648:25.92 compiz
23402 st 20 0 478268 99020 26808 S 17.3 1.2 0:56.68 plugin-containe
 1494 root 20 0 288600 135940 120820 S 15.0 1.7 73:19.35 Xorg
 3056 st 20 0 1221400 290712 51564 S 6.0 3.6 30:53.44 firefox

ProblemType: Bug
DistroRelease: Ubuntu 14.10
Package: compiz 1:0.9.12+14.10.20140812-0ubuntu1
ProcVersionSignature: Ubuntu 3.8.0-9.18-generic 3.8.1
Uname: Linux 3.8.0-9-generic i686
ApportVersion: 2.14.7-0ubuntu2
Architecture: i386
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: compiz
CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
CompositorUnredirectFSW: true
CurrentDesktop: Unity
CurrentDmesg: Error: command ['sh', '-c', 'dmesg | comm -13 --nocheck-order /var/log/dmesg -'] failed with exit code 1: comm: /var/log/dmesg: Permission denied
Date: Wed Sep 24 04:16:16 2014
DistUpgraded: 2014-09-19 22:27:50,473 DEBUG enabling apt cron job
DistroCodename: utopic
DistroVariant: ubuntu
GraphicsCard:
 Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller [8086:0126] (rev 09) (prog-if 00 [VGA controller])
   Subsystem: Lenovo Device [17aa:21ce]
MachineType: LENOVO 42363E1
PackageArchitecture: all
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-9-generic root=UUID=2fc13a1d-52a1-43af-a176-a1979b0bbaef ro quiet splash vt.handoff=7
SourcePackage: compiz
UpgradeStatus: Upgraded to utopic on 2014-09-19 (4 days ago)
dmi.bios.date: 06/16/2011
dmi.bios.vendor: LENOVO
dmi.bios.version: 83ET60WW (1.30 )
dmi.board.asset.tag: Not Available
dmi.board.name: 42363E1
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: 4236R8YF3EB
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvr83ET60WW(1.30):bd06/16/2011:svnLENOVO:pn42363E1:pvrThinkPadT420:rvnLENOVO:rn42363E1:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 42363E1
dmi.product.version: ThinkPad T420
dmi.sys.vendor: LENOVO
version.compiz: compiz 1:0.9.12+14.10.20140812-0ubuntu1
version.libdrm2: libdrm2 2.4.56-1
version.libgl1-mesa-dri: libgl1-mesa-dri 10.2.6-1ubuntu3
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 10.2.6-1ubuntu3
version.xserver-xorg-core: xserver-xorg-core 2:1.16.0-1ubuntu1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.0-1ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.4.0-2ubuntu2
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.914-1~exp1ubuntu3
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.11-1ubuntu2
xserver.bootTime: Tue Sep 23 21:43:02 2014
xserver.configfile: default
xserver.errors:

xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:
 product id 738
 vendor LGD
xserver.version: 2:1.16.0-1ubuntu1

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.