One user account on Macbook Pro is painfully slow

Question

We have 2 user accounts on our 2011 Macbook Pro.  My user account is extremely slow when doing everything from opening apps to using the net and the colourful spinning wheel is driving me nuts!  iPhoto is one of the worst and is something I use quite a bit.  There were a lot of photos on there most of which have since been moved to an external hard drive to free up space on the hard drive however it is still incredibly slow even when flicking between photos and editing photos is worse.  When using Safari even trying to type something in the subject line brings up the spinning wheel, let alone trying to scroll down a page once it finally loads!   The other account works fine and doesn't seem to be affected.  Please help!

Answer 1

I hope I didn't copy too much.
09/07/2014 17:29:33.758 com.apple.launchd.peruser.501[163]: (com.apple.photostream-agent[1438]) Job appears to have crashed: Abort trap: 6
09/07/2014 17:29:34.245 ReportCrash[1442]: Saved crash report for PhotoStreamAgent[1438] version 2.7 (351.36) to /Users/Ella/Library/Logs/DiagnosticReports/PhotoStreamAgent_2014-07-09-172934_E llas-Mac.crash
09/07/2014 17:29:34.268 ReportCrash[1442]: Removing excessive log: file:///Users/Ella/Library/Logs/DiagnosticReports/PhotoStreamAgent_2014-07-08-2 14859_Ellas-Mac.crash
09/07/2014 17:29:35.105 com.apple.SecurityServer[15]: Session 100214 created
09/07/2014 17:29:35.213 com.apple.SecurityServer[15]: Killing auth hosts
09/07/2014 17:29:35.214 com.apple.SecurityServer[15]: Session 100213 destroyed
09/07/2014 17:29:35.458 PhotoStreamAgent[1444]: *** NSDistantObject initWithCoder: 1 not given away for conn 0x7fa2955ab310
09/07/2014 17:29:35.458 PhotoStreamAgent[1444]: *** -[NSKeyedPortCoder decodeInvocation]: unable to decode a target for this invocation
09/07/2014 17:29:35.459 PhotoStreamAgent[1444]: (
  0   CoreFoundation                      0x00007fff982a425c __exceptionPreprocess + 172
  1   libobjc.A.dylib                     0x00007fff8c7efe75 objc_exception_throw + 43
  2   CoreFoundation                      0x00007fff982a410c +[NSException raise:format:] + 204
  3   Foundation                          0x00007fff8ed783b9 -[NSKeyedPortCoder decodeInvocation] + 106
  4   Foundation                          0x00007fff8ebe371d -[NSKeyedPortCoder decodeObjectForKey:] + 735
  5   Foundation                          0x00007fff8ec3b4da -[NSConnection handleRequest:sequence:] + 103
  6   Foundation                          0x00007fff8ebe2d50 -[NSConnection handlePortCoder:] + 652
  7   Foundation                          0x00007fff8ebe2688 -[NSConnection dispatchWithComponents:] + 50
  8   Foundation                          0x00007fff8ebc6f38 __NSFireMachPort + 257
  9   CoreFoundation                      0x00007fff981d59c4 __CFMachPortPerform + 388
  10  CoreFoundation                      0x00007fff981d5829 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 41
  11  CoreFoundation                      0x00007fff981d579e __CFRunLoopDoSource1 + 478
  12  CoreFoundation                      0x00007fff981c67d6 __CFRunLoopRun + 1830
  13  CoreFoundation                      0x00007fff981c5e75 CFRunLoopRunSpecific + 309
  14  HIToolbox                           0x00007fff94882a0d RunCurrentEventLoopInMode + 226
  15  HIToolbox                           0x00007fff94882685 ReceiveNextEventCommon + 173
  16  HIToolbox                           0x00007fff948825bc _BlockUntilNextEventMatchingListInModeWithFilter + 65
  17  AppKit                              0x00007fff95db624e _DPSNextEvent + 1434
  18  AppKit                              0x00007fff95db589b -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] + 122
  19  AppKit                              0x00007fff95da999c -[NSApplication run] + 553
  20  PhotoStreamAgent                    0x000000010b45f473 PhotoStreamAgent + 9331
  21  libdyld.dylib                       0x00007fff9476f5fd start + 1
09/07/2014 17:29:37.463 com.apple.dock.extra[245]: iPhotoDockTilePlugin: Unable to get dock badge information: connection timeout: did not receive reply
09/07/2014 17:29:52.000 kernel[0]: disk0s2: I/O error.
09/07/2014 17:29:52.000 kernel[0]: hfs_clonefile: cluster_read failed - 5
09/07/2014 17:30:05.000 kernel[0]: disk0s2: I/O error.
09/07/2014 17:30:05.000 kernel[0]: hfs_clonefile: cluster_read failed - 5
09/07/2014 17:30:16.000 kernel[0]: disk0s2: I/O error.
09/07/2014 17:30:16.388 PhotoStreamAgent[1444]: read failed on path:"/Users/Ella/Pictures/iPhoto Library/Masters/2014/04/19/20140419-083923/DSC_0361.JPG", ino:0, offset:0x0, size:5242880, error:"Reading the reader failed for an unspecified reason"
09/07/2014 17:30:16.390 PhotoStreamAgent[1444]: MSPublishMMCSProtocol - 202500971 Could not compute signature for asset. Ignoring. <MSAsset: 0x7fa2950d6200> GUID: 8C08E117-7FB1-43D9-8F76-BA92231DB80D Path: /Users/Ella/Pictures/iPhoto Library/Masters/2014/04/19/20140419-083923/DSC_0361.JPG
Error: __NSCFError:
Domain  : com.apple.mmcs
Code    : 18
Desc    : Unable to calculate signature.
UserInfo: {
    NSDescription = "Unable to calculate signature.";
    NSLocalizedDescription = "Unable to calculate signature.";
09/07/2014 17:30:29.000 kernel[0]: disk0s2: I/O error.
09/07/2014 17:30:29.000 kernel[0]: hfs_clonefile: cluster_read failed - 5
09/07/2014 17:30:42.000 kernel[0]: disk0s2: I/O error.
09/07/2014 17:30:42.000 kernel[0]: hfs_clonefile: cluster_read failed - 5
09/07/2014 17:30:53.000 kernel[0]: disk0s2: I/O error.
09/07/2014 17:30:54.304 com.apple.launchd.peruser.501[163]: (com.apple.photostream-agent[1444]) Job appears to have crashed: Abort trap: 6
09/07/2014 17:30:55.429 ReportCrash[1450]: Saved crash report for PhotoStreamAgent[1444] version 2.7 (351.36) to /Users/Ella/Library/Logs/DiagnosticReports/PhotoStreamAgent_2014-07-09-173055_E llas-Mac.crash
09/07/2014 17:30:55.448 ReportCrash[1450]: Removing excessive log: file:///Users/Ella/Library/Logs/DiagnosticReports/PhotoStreamAgent_2014-07-08-2 15021_Ellas-Mac.crash