Mavericks too slow

mavericks make make my macbook air 2011 two to third time slower!

this below is EtreCheck detalis

Hardware Information:

MacBook Air (11-inch, Mid 2011)

MacBook Air - model: MacBookAir4,1

1 1.6 GHz Intel Core i5 CPU: 2 cores

4 GB RAM

Video Information:

Intel HD Graphics 3000 - VRAM: 384 MB

Audio Plug-ins:

BluetoothAudioPlugIn: Version: 1.0

AirPlay: Version: 1.9

AppleAVBAudio: Version: 2.0.0

iSightAudio: Version: 7.7.3

Startup Items:

Fantom - Path: /Library/StartupItems/Fantom

Jaksta - Path: /Library/StartupItems/Jaksta

VirtualBox - Path: /Library/StartupItems/VirtualBox

System Software:

OS X 10.9 (13A603) - Uptime: 0 days 0:31:28

Disk Information:

APPLE SSD SM128C disk0 : (121.33 GB)

EFI (disk0s1) <not mounted>: 209.7 MB

Mac Drive (disk0s2) /: 120.47 GB (25.57 GB free)

Recovery HD (disk0s3) <not mounted>: 650 MB

USB Information:

Apple Inc. Apple Internal Keyboard / Trackpad

Apple Inc. BRCM20702 Hub

Apple Inc. Bluetooth USB Host Controller

Apple Inc. FaceTime Camera (Built-in)

FireWire Information:

Thunderbolt Information:

Apple Inc. thunderbolt_bus

Kernel Extensions:

org.virtualbox.kext.VBoxDrv (4.2.8)

org.virtualbox.kext.VBoxUSB (4.2.8)

com.bresink.driver.BRESINKx86Monitoring (9.0)

Problem System Launch Daemons:

Problem System Launch Agents:

Launch Daemons:

[loaded] com.adobe.fpsaud.plist

[loaded] com.parallels.desktop.launchdaemon.plist

Launch Agents:

[failed] com.parallels.desktop.launch.plist

[loaded] com.parallels.DesktopControlAgent.plist

[loaded] com.parallels.vm.prl_pcproxy.plist

[loaded] net.culater.SIMBL.Agent.plist

User Launch Agents:

[loaded] com.google.keystone.agent.plist

[loaded] net.infinite-labs.SIMBLEnablerForSandboxedApps.plist

[not loaded] org.virtualbox.vboxwebsrv.plist

User Login Items:

CPULed

iTunesHelper

Moom

CrossOver CD Helper

Temperature Monitor

Music Manager

Google Drive

Android File Transfer Agent

TomTomHOMERunner

3rd Party Preference Panes:

Flash Player

Java

Microsoft Keyboard

Microsoft Mouse

MusicManager

Internet Plug-ins:

Default Browser.plugin

Flash Player.plugin

FlashPlayer-10.6.plugin

GarminGpsControl.plugin

iPhotoPhotocast.plugin

JavaAppletPlugin.plugin

QuickTime Plugin.plugin

Silverlight.plugin

User Internet Plug-ins:

RealPlayer Plugin.plugin

Bad Fonts:

None

Time Machine:

Skip System Files: NO

Mobile backups: OFF

Auto backup: NO

Volumes being backed up:

Mac Drive: Requires: 94.91 GB

Destinations:

time machine [Local] (Last used)

Total size: 250.19 GB

Total number of backups: 0

Space available for backups: Insufficient!

Top Processes by CPU:

9% WindowServer

7% SIMBL Enabler for Sandboxed Apps

3% Safari

2% EtreCheck

1% hidd

1% prl_disp_service

1% ps

1% Moom

0% launchservicesd

0% CPULed

Top Processes by Memory:

188 MB Safari

131 MB mds_stores

79 MB com.apple.WebKit.WebContent

78 MB Dictionary

70 MB WindowServer

66 MB SystemUIServer

57 MB Dock

57 MB Google Drive

53 MB Finder

53 MB CalendarAgent

Virtual Memory Statistics

468 MB Free RAM

1.26 GB Active RAM

898 MB Inactive RAM

1.04 GB Wired RAM

293 MB Page-ins

1 MB Page-outs