Yosemite causing slow screen refresh using TOS

Problem description:
I use my iMac for trading with a java script app called ‘ThinkOrSwim’.  It was working fine with Mavericks then I upgraded to Yosemite.  Problems continue even when upgrading my RAM from 4GB to 16GB.  Overtime the Screen refreshes get really slow after using the ‘TOS’ Platform for 2-3 hours.  Have to do a SMC Reset to be able to use the ‘TOS’ platform once it becomes too unbearable to work with it.
EtreCheck version: 2.1.6 (109)
Report generated January 22, 2015 at 3:05:42 PM CST
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Hardware Information: ℹ️
  iMac (27-inch, Mid 2010) (Technical Specifications)
  iMac - model: iMac11,3
  1 3.2 GHz Intel Core i3 CPU: 2-core
  16 GB RAM Upgradeable
  BANK 0/DIMM0
  4 GB DDR3 1333 MHz ok
  BANK 1/DIMM0
  4 GB DDR3 1333 MHz ok
  BANK 0/DIMM1
  4 GB DDR3 1333 MHz ok
  BANK 1/DIMM1
  4 GB DDR3 1333 MHz ok
  Bluetooth: Old - Handoff/Airdrop2 not supported
  Wireless:  en1: 802.11 a/b/g/n
Video Information: ℹ️
  ATI Radeon HD 5670 - VRAM: 512 MB
  iMac 2560 x 1440
System Software: ℹ️
  OS X 10.10.1 (14B25) - Time since boot: 0:21:32
Disk Information: ℹ️
  WDC WD1001FALS-40Y6A0 disk0 : (1 TB)
  EFI (disk0s1) <not mounted> : 210 MB
  Macintosh HD (disk0s2) / : 999.35 GB (888.30 GB free)
  Recovery HD (disk0s3) <not mounted>  [Recovery]: 650 MB
  OPTIARC DVD RW AD-5680H 
USB Information: ℹ️
  Apple Internal Memory Card Reader
  Apple Inc. BRCM2046 Hub
  Apple Inc. Bluetooth USB Host Controller
  Apple Computer, Inc. IR Receiver
  Apple Inc. Built-in iSight
Gatekeeper: ℹ️
  Mac App Store and identified developers
Launch Agents: ℹ️
  [loaded] com.google.keystone.agent.plist [Support]
  [failed] com.lexmark.bmspecificlaunchd.plist [Support] [Details]
  [loaded] com.lexmark.lexprint.plist [Support]
  [failed] com.lexmark.lxknetlaunchd.plist [Support] [Details]
  [invalid?] com.oracle.java.Java-Updater.plist [Support]
Launch Daemons: ℹ️
  [loaded] com.adobe.fpsaud.plist [Support]
  [loaded] com.google.keystone.daemon.plist [Support]
  [loaded] com.macpaw.CleanMyMac2.Agent.plist [Support]
  [invalid?] com.oracle.java.Helper-Tool.plist [Support]
  [loaded] com.oracle.java.JavaUpdateHelper.plist [Support]
User Launch Agents: ℹ️
  [loaded] com.macpaw.CleanMyMac2Helper.diskSpaceWatcher.plist [Support]
  [loaded] com.macpaw.CleanMyMac2Helper.scheduledScan.plist [Support]
  [loaded] com.macpaw.CleanMyMac2Helper.trashWatcher.plist [Support]
User Login Items: ℹ️
  Preview Application  (/Applications/Preview.app)
Internet Plug-ins: ℹ️
  FlashPlayer-10.6: Version: 16.0.0.235 - SDK 10.6 [Support]
  Default Browser: Version: 600 - SDK 10.10
  Flash Player: Version: 16.0.0.235 - SDK 10.6 Mismatch! Adobe recommends 16.0.0.287
  QuickTime Plugin: Version: 7.7.3
  o1dbrowserplugin: Version: 5.38.6.0 - SDK 10.8 [Support]
  OfficeLiveBrowserPlugin: Version: 12.3.6 [Support]
  Google Earth Web Plug-in: Version: 6.2 [Support]
  googletalkbrowserplugin: Version: 5.38.6.0 - SDK 10.8 [Support]
  DirectorShockwave: Version: 11.6.1r629 [Support]
  iPhotoPhotocast: Version: 7.0
User internet Plug-ins: ℹ️
  thinkorswim plugin_x86_64: Version: thinkorswim_x86_64 1.0.0.0 - SDK 10.7 [Support]
  tossc plugin_x86_64: Version: TOS Sharing Center plugin_x86_64 1.0.0.0 - SDK 10.7 [Support]
  WebEx64: Version: 1.0 - SDK 10.6 [Support]
3rd Party Preference Panes: ℹ️
  Flash Player  [Support]
Time Machine: ℹ️
  Time Machine not configured!
Top Processes by CPU: ℹ️
      19% JavaApplicationStub
      6% WindowServer
      0% fontd
      0% launchd
      0% notifyd
Top Processes by Memory: ℹ️
  1.05 GB JavaApplicationStub
  103 MB mds_stores
  86 MB Safari
  69 MB Dock
  52 MB spindump
Virtual Memory Information: ℹ️
  13.27 GB Free RAM
  2.43 GB Active RAM
  532 MB Inactive RAM
  945 MB Wired RAM
  1.14 GB Page-ins
  0 B Page-outs
Diagnostics Information: ℹ️
  Jan 22, 2015, 02:44:42 PM Self test - passed

I just want to add that to further this improvement, I also disabled stat menus, and anything on the menu bar that caused the screen to refresh. I disabled transparency, the genie effect, and forced quit the window server on the activity monitor, and disabled the dashboard and the system preference "displays have separate spaces" - which required a re-login.
I also left the auto-switching on the nergey preferences to the GPU to always use the 330m, rather than the intel hd card.
Basically, I disabled anything that made any extra load on the GPU.

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