Does Windows 7 cache directory sizes? (with indexing off!)





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I migrated from a ThinkPad T420s (Windows 7 Pro x64) to a third generation ThinkPad X1 Tablet (Windows 10 Pro x64). The new machine has considerably better SSD performance on paper. After disabling Defender Antivirus in Windows 10, I can also experience the performance difference. However, there is something I don't understand. When showing the properties of my Dropbox directory, the new machine takes four times longer than the old one:



12 seconds (new) vs. 3 seconds (old)



Screenshot of Dropbox properties window



On the new machine, the Dropbox folder is not indexed. So I changed the old machine accordingly. I disabled indexing for the Dropbox folder, rebuilt the index, and eventually I removed the Windows 7 Search feature altogether. Still the difference persists!



Does Windows 7 somehow cache the size of directories? Can I clear that cache? (it can't be the index, since that's cleared already, and disabled)



I also compared how long it takes to get the size of the directory from PowerShell:



Measure-Command { (get-childitem Verzeichnis -recurse | measure-object -property length -sum).sum/1GB }


Here the results are what I expect. On the new machine, the process takes 14 seconds, while on the old one it takes more than a minute.










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    I migrated from a ThinkPad T420s (Windows 7 Pro x64) to a third generation ThinkPad X1 Tablet (Windows 10 Pro x64). The new machine has considerably better SSD performance on paper. After disabling Defender Antivirus in Windows 10, I can also experience the performance difference. However, there is something I don't understand. When showing the properties of my Dropbox directory, the new machine takes four times longer than the old one:



    12 seconds (new) vs. 3 seconds (old)



    Screenshot of Dropbox properties window



    On the new machine, the Dropbox folder is not indexed. So I changed the old machine accordingly. I disabled indexing for the Dropbox folder, rebuilt the index, and eventually I removed the Windows 7 Search feature altogether. Still the difference persists!



    Does Windows 7 somehow cache the size of directories? Can I clear that cache? (it can't be the index, since that's cleared already, and disabled)



    I also compared how long it takes to get the size of the directory from PowerShell:



    Measure-Command { (get-childitem Verzeichnis -recurse | measure-object -property length -sum).sum/1GB }


    Here the results are what I expect. On the new machine, the process takes 14 seconds, while on the old one it takes more than a minute.










    share|improve this question

























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      I migrated from a ThinkPad T420s (Windows 7 Pro x64) to a third generation ThinkPad X1 Tablet (Windows 10 Pro x64). The new machine has considerably better SSD performance on paper. After disabling Defender Antivirus in Windows 10, I can also experience the performance difference. However, there is something I don't understand. When showing the properties of my Dropbox directory, the new machine takes four times longer than the old one:



      12 seconds (new) vs. 3 seconds (old)



      Screenshot of Dropbox properties window



      On the new machine, the Dropbox folder is not indexed. So I changed the old machine accordingly. I disabled indexing for the Dropbox folder, rebuilt the index, and eventually I removed the Windows 7 Search feature altogether. Still the difference persists!



      Does Windows 7 somehow cache the size of directories? Can I clear that cache? (it can't be the index, since that's cleared already, and disabled)



      I also compared how long it takes to get the size of the directory from PowerShell:



      Measure-Command { (get-childitem Verzeichnis -recurse | measure-object -property length -sum).sum/1GB }


      Here the results are what I expect. On the new machine, the process takes 14 seconds, while on the old one it takes more than a minute.










      share|improve this question














      I migrated from a ThinkPad T420s (Windows 7 Pro x64) to a third generation ThinkPad X1 Tablet (Windows 10 Pro x64). The new machine has considerably better SSD performance on paper. After disabling Defender Antivirus in Windows 10, I can also experience the performance difference. However, there is something I don't understand. When showing the properties of my Dropbox directory, the new machine takes four times longer than the old one:



      12 seconds (new) vs. 3 seconds (old)



      Screenshot of Dropbox properties window



      On the new machine, the Dropbox folder is not indexed. So I changed the old machine accordingly. I disabled indexing for the Dropbox folder, rebuilt the index, and eventually I removed the Windows 7 Search feature altogether. Still the difference persists!



      Does Windows 7 somehow cache the size of directories? Can I clear that cache? (it can't be the index, since that's cleared already, and disabled)



      I also compared how long it takes to get the size of the directory from PowerShell:



      Measure-Command { (get-childitem Verzeichnis -recurse | measure-object -property length -sum).sum/1GB }


      Here the results are what I expect. On the new machine, the process takes 14 seconds, while on the old one it takes more than a minute.







      windows-7 windows-10 ssd performance powershell






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      asked Feb 3 at 14:27









      fekleefeklee

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