title: Visual Studio freezes when I save then switch file
body: <p>Environment : Visual Studio 2010 v10.0.31118.1 SP1, Addins : jetBrain,DXCore,VisualSVN Windows 7 (up to date)</p>
  
  <p>Since a long time Visual Studio is really slow, so I tried to see how to reproduce the problem and it's really simple : I add a letter to a file, save and then try to open an other file.</p>
  
  <p>Then Visual Studio freezes for 10sec or more. if I just save or open a file there is no hang at all.</p>
  
  <p>I looked at the processes with ProcEx.exe and I saw that devenv.exe has a lot of I/O.</p>
  
  <p>So with ProcMon I tried to see what was going on, and I saw that visual studio opened every single file of my web site, and every file of the temporary asp.net files folder linked to my website.</p>
  
  <p>So I looked at the stacktrace of every "ReadFile" operation and I get</p>
  
  <pre><code>0 fltmgr.sys fltmgr.sys + 0x2027 0xfffff880010ab027 C:\Windows\system32\drivers\fltmgr.sys
  
  1 fltmgr.sys fltmgr.sys + 0x48ca 0xfffff880010ad8ca C:\Windows\system32\drivers\fltmgr.sys
  
  2 fltmgr.sys fltmgr.sys + 0x222a3 0xfffff880010cb2a3 C:\Windows\system32\drivers\fltmgr.sys
  
  3 ntoskrnl.exe ntoskrnl.exe + 0x373807 0xfffff80002dda807 C:\Windows\system32\ntoskrnl.exe
  
  4 ntoskrnl.exe ntoskrnl.exe + 0x369e84 0xfffff80002dd0e84 C:\Windows\system32\ntoskrnl.exe
  
  5 ntoskrnl.exe ntoskrnl.exe + 0x36ee4d 0xfffff80002dd5e4d C:\Windows\system32\ntoskrnl.exe
  
  6 ntoskrnl.exe ntoskrnl.exe + 0x375917 0xfffff80002ddc917 C:\Windows\system32\ntoskrnl.exe
  
  7 ntoskrnl.exe ntoskrnl.exe + 0x37f520 0xfffff80002de6520 C:\Windows\system32\ntoskrnl.exe
  
  8 ntoskrnl.exe ntoskrnl.exe + 0x6f993 0xfffff80002ad6993 C:\Windows\system32\ntoskrnl.exe
  
  9 ntdll.dll ntdll.dll + 0x502aa 0x76f602aa C:\Windows\SYSTEM32\ntdll.dll
  
  10 wow64.dll wow64.dll + 0x1bfe3 0x74c0bfe3 C:\Windows\SYSTEM32\wow64.dll
  
  11 wow64.dll wow64.dll + 0xcf87 0x74bfcf87 C:\Windows\SYSTEM32\wow64.dll
  
  12 wow64cpu.dll wow64cpu.dll + 0x276d 0x74b8276d C:\Windows\SYSTEM32\wow64cpu.dll
  
  13 wow64.dll wow64.dll + 0xd07e 0x74bfd07e C:\Windows\SYSTEM32\wow64.dll
  
  14 wow64.dll wow64.dll + 0xc549 0x74bfc549 C:\Windows\SYSTEM32\wow64.dll
  
  15 ntdll.dll ntdll.dll + 0x7c367 0x76f8c367 C:\Windows\SYSTEM32\ntdll.dll
  
  16 ntdll.dll ntdll.dll + 0x32e2e 0x76f42e2e C:\Windows\SYSTEM32\ntdll.dll
  
  17 ntdll.dll ntdll.dll + 0x20056 0x77110056 C:\Windows\SysWOW64\ntdll.dll
  
  18 KERNELBASE.dll KERNELBASE.dll + 0x1b616 0x750bb616 C:\Windows\syswow64\KERNELBASE.dll
  
  19 kernel32.dll kernel32.dll + 0x12345 0x74d82345 C:\Windows\syswow64\kernel32.dll
  
  20 cslangsvc.dll TypeReference_Release + 0x36e86 0x535fbe8b C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC#\VCSPackages\cslangsvc.dll
  
  21 cslangsvc.dll TypeReference_Release + 0x36ed9 0x535fbede C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC#\VCSPackages\cslangsvc.dll
  
  22 cslangsvc.dll LangService_IsPrimaryThread + 0x2167 0x5357633b C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC#\VCSPackages\cslangsvc.dll
  
  23 cslangsvc.dll BaseNode_GetBaseOffset + 0x3f1c 0x536a8311 C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC#\VCSPackages\cslangsvc.dll
  
  24 cslangsvc.dll BaseNode_GetBaseOffset + 0x39c6 0x536a7dbb C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC#\VCSPackages\cslangsvc.dll
  
  25 cslangsvc.dll cslangsvc.dll + 0xedd0 0x534fedd0 C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC#\VCSPackages\cslangsvc.dll
  
  26 cslangsvc.dll LexData_FindFirstPrecedingNonWhiteChar + 0x1a5a 0x5369b229 C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC#\VCSPackages\cslangsvc.dll
  
  27 cslangsvc.dll cslangsvc.dll + 0x71efc 0x53561efc C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC#\VCSPackages\cslangsvc.dll
  
  28 cslangsvc.dll cslangsvc.dll + 0x71df3 0x53561df3 C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC#\VCSPackages\cslangsvc.dll
  
  29 cslangsvc.dll cslangsvc.dll + 0x72077 0x53562077 C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC#\VCSPackages\cslangsvc.dll
  
  30 cslangsvc.dll UsingDirectiveNode_GetName + 0x603c2 0x5366428d C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC#\VCSPackages\cslangsvc.dll
  
  31 kernel32.dll kernel32.dll + 0x13677 0x74d83677 C:\Windows\syswow64\kernel32.dll
  
  32 ntdll.dll ntdll.dll + 0x39d42 0x77129d42 C:\Windows\SysWOW64\ntdll.dll
  
  33 ntdll.dll ntdll.dll + 0x39d15 0x77129d15 C:\Windows\SysWOW64\ntdll.dll
  </code></pre>
  
  <p>So do you have any guess ?</p>
  
  <p>Thanks</p>