Hi,
I am having a similar issue. As soon as I updated to OS X Yosemite my MacBook Pro (13-inch, Late 2011) started running so slow.
I ran the EtreCheck and this is what came up. Any help would be much appreciated!
EtreCheck version: 2.2 (132)
Report generated 4/20/15, 9:32 PM
Download EtreCheck from http://etresoft.com/etrecheck
Click the [Click for support] links for help with non-Apple products.
Click the [Click for details] links for more information about that line.
Hardware Information: ℹ️
MacBook Pro (13-inch, Late 2011) (Verified)
MacBook Pro - model: MacBookPro8,1
1 2.8 GHz Intel Core i7 CPU: 2-core
4 GB RAM Upgradeable
BANK 0/DIMM0
2 GB DDR3 1333 MHz ok
BANK 1/DIMM0
2 GB DDR3 1333 MHz ok
Bluetooth: Old - Handoff/Airdrop2 not supported
Wireless: en1: 802.11 a/b/g/n
Battery: Health = Normal - Cycle count = 516 - SN = 9G13304STD3NB
Video Information: ℹ️
Intel HD Graphics 3000
Color LCD 1280 x 800
System Software: ℹ️
OS X 10.10.3 (14D136) - Time since boot: 0:45:49
Disk Information: ℹ️
Hitachi HTS547575A9E384 disk0 : (750.16 GB)
EFI (disk0s1) <not mounted> : 210 MB
Macintosh HD (disk0s2) / : 749.30 GB (529.05 GB free)
Recovery HD (disk0s3) <not mounted> [Recovery]: 650 MB
MATSHITADVD-R UJ-8A8
USB Information: ℹ️
Apple Inc. FaceTime HD Camera (Built-in)
Apple Inc. Apple Internal Keyboard / Trackpad
Apple Inc. BRCM2070 Hub
Apple Inc. Bluetooth USB Host Controller
Apple Computer, Inc. IR Receiver
Thunderbolt Information: ℹ️
Apple Inc. thunderbolt_bus
Configuration files: ℹ️
/etc/hosts - Count: 17
Gatekeeper: ℹ️
Mac App Store and identified developers
Startup Items: ℹ️
HP IO: Path: /Library/StartupItems/HP IO
Startup items are obsolete in OS X Yosemite
Problem System Launch Daemons: ℹ️
[failed] com.apple.mtrecorder.plist
Launch Agents: ℹ️
[not loaded] com.adobe.AAM.Updater-1.0.plist [Click for support]
[failed] com.adobe.CS5ServiceManager.plist [Click for support] [Click for details]
[loaded] com.coupons.coupond.plist [Click for support]
[loaded] com.google.keystone.agent.plist [Click for support]
[loaded] com.oracle.java.Java-Updater.plist [Click for support]
Launch Daemons: ℹ️
[loaded] com.adobe.fpsaud.plist [Click for support]
[loaded] com.adobe.SwitchBoard.plist [Click for support]
[failed] com.apple.spirecorder.plist
[loaded] com.ea.origin.ESHelper.plist [Click for support]
[loaded] com.google.keystone.daemon.plist [Click for support]
[loaded] com.microsoft.office.licensing.helper.plist [Click for support]
[loaded] com.oracle.java.Helper-Tool.plist [Click for support]
[loaded] com.oracle.java.JavaUpdateHelper.plist [Click for support]
User Launch Agents: ℹ️
[loaded] com.adobe.AAM.Updater-1.0.plist [Click for support]
[loaded] com.adobe.ARM.[...].plist [Click for support]
[failed] com.apple.CSConfigDotMacCert-[...]@me.com-SharedServices.Agent.plist [Click for details]
[loaded] com.citrixonline.GoToMeeting.G2MUpdate.plist [Click for support]
[failed] com.facebook.videochat.[redacted].plist [Click for support] [Click for details]
[running] com.spotify.webhelper.plist [Click for support]
User Login Items: ℹ️
iTunesHelper Application Hidden (/Applications/iTunes.app/Contents/MacOS/iTunesHelper.app)
Nike+ Connect Helper Application Hidden (/Applications/Nike+ Connect.app/Contents/Resources/Nike+ Connect Helper.app)
Dropbox Application (/Applications/Dropbox.app)
AdobeResourceSynchronizer Application Hidden (/Applications/Adobe Reader.app/Contents/Support/AdobeResourceSynchronizer.app)
HP Scheduler Application (/Library/Application Support/Hewlett-Packard/Software Update/HP Scheduler.app)
Internet Plug-ins: ℹ️
o1dbrowserplugin: Version: 5.41.0.0 - SDK 10.8 [Click for support]
Unity Web Player: Version: UnityPlayer version 3.5.5f4 - SDK 10.6 [Click for support]
Default Browser: Version: 600 - SDK 10.10
AdobeExManDetect: Version: AdobeExManDetect 1.1.0.0 - SDK 10.7 [Click for support]
Flip4Mac WMV Plugin: Version: 2.4.2.4 [Click for support]
AdobePDFViewerNPAPI: Version: 11.0.10 - SDK 10.6 [Click for support]
FlashPlayer-10.6: Version: 17.0.0.169 - SDK 10.6 [Click for support]
Silverlight: Version: 5.1.10411.0 - SDK 10.6 [Click for support]
WidevineMediaOptimizer: Version: 6.0.0.12757 - SDK 10.7 [Click for support]
Flash Player: Version: 17.0.0.169 - SDK 10.6 [Click for support]
QuickTime Plugin: Version: 7.7.3
googletalkbrowserplugin: Version: 5.41.0.0 - SDK 10.8 [Click for support]
SharePointBrowserPlugin: Version: 14.4.8 - SDK 10.6 [Click for support]
AdobePDFViewer: Version: 11.0.10 - SDK 10.6 [Click for support]
CouponPrinter-FireFox_v2: Version: 5.0.3 - SDK 10.6 [Click for support]
JavaAppletPlugin: Version: Java 8 Update 40 Check version
User internet Plug-ins: ℹ️
CitrixOnlineWebDeploymentPlugin: Version: 1.0.105 [Click for support]
npBcsMcTcIO: Version: Unknown [Click for support]
Safari Extensions: ℹ️
AdBlock
3rd Party Preference Panes: ℹ️
Flash Player [Click for support]
Flip4Mac WMV [Click for support]
Java [Click for support]
Time Machine: ℹ️
Time Machine not configured!
Top Processes by CPU: ℹ️
17% Finder
15% com.apple.WebKit.WebContent(4)
14% WindowServer
7% com.apple.WebKit.Networking
1% nsurlstoraged(2)
Top Processes by Memory: ℹ️
512 MB com.apple.WebKit.WebContent(4)
494 MB kernel_task
209 MB Safari
201 MB Finder
139 MB mds_stores
Virtual Memory Information: ℹ️
166 MB Free RAM
3.84 GB Used RAM
0 B Swap Used
Diagnostics Information: ℹ️
Mar 14, 2030, 12:08:06 AM /Users/[redacted]/Library/Logs/DiagnosticReports/Mail_2030-03-14-000806_[redact ed].crash
Apr 20, 2015, 08:47:32 PM /Users/[redacted]/Library/Logs/DiagnosticReports/findNames_2015-04-20-204732_[r edacted].crash
Apr 20, 2015, 08:39:26 PM Self test - passed