[ { "Id": "265348", "ThreadId": "77608", "Html": "

Used DotNetZip to zip a folder containing 98,000 files and 3,700 folders (1.7 GB).  Zipped in 30 minutes.  Unzipping using DotNetZip, however, takes about 4 hours.  This is the code:

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Using zip As ZipFile = ZipFile.Read([path-and-name-of-zipfile)               
             
 [then either:]  zip.ExtractAll(txtDestFolder.Text, ExtractExistingFileAction.OverwriteSilently)
               
 [or:}           zip.ExtractAll(txtDestFolder.Text, ExtractExistingFileAction.DoNotOverwrite)
               
End Using

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Is there a better method I could use to speed up the unzip process ?

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thank you

", "PostedDate": "2009-12-09T07:35:44.867-08:00", "UserRole": null, "MarkedAsAnswerDate": null }, { "Id": "266380", "ThreadId": "77608", "Html": "

4 hours!  That's unacceptable.  Sounds like a performance bug in the unzip process.  I suspect it is setting file attributes more than once.

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I'll have to look at it a little more closely and get back to you.  What version of DotNetZip are you using?

", "PostedDate": "2009-12-11T11:16:18.6-08:00", "UserRole": null, "MarkedAsAnswerDate": null }, { "Id": "266381", "ThreadId": "77608", "Html": "This discussion has been copied to a work item. Click here to go to the work item and continue the discussion.", "PostedDate": "2009-12-11T11:17:18.643-08:00", "UserRole": null, "MarkedAsAnswerDate": null }, { "Id": "266419", "ThreadId": "77608", "Html": "\r\n\r\n
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Version is 1.8.4.28 dated Nov 11, 2009. Let me know if you’d\r\nlike the zip file, have it available on FTP site.

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Kate Carbery,\r\n Programmer / Analyst
\r\nPMC\r\nSoftware Inc.
\r\nSuite\r\n 11, 8\r\n Bartles Corner Road
\r\n Flemington, NJ\r\n 08822
\r\nVoice:\r\n(908) 806-7824 Fax (908) 806-3951
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\r\n\r\n", "PostedDate": "2009-12-11T12:43:15.257-08:00", "UserRole": null, "MarkedAsAnswerDate": null }, { "Id": "266423", "ThreadId": "77608", "Html": "

KC - how big is the zip?   Can you characterize the folder structure - how nested is it?  3700 toplevel folders?  Or.. are there multiple levels of subdirectory?  and how many files in each folder?

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thanks.

", "PostedDate": "2009-12-11T12:54:56.327-08:00", "UserRole": null, "MarkedAsAnswerDate": null }, { "Id": "266441", "ThreadId": "77608", "Html": "\r\n\r\n
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Archive is 265 mb. Folders go down 2-3 levels generally,\r\n468 at top level, about half with 1 or 2 levels below that.

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Kate Carbery,\r\n Programmer / Analyst
\r\nPMC\r\nSoftware Inc.
\r\nSuite\r\n 11, 8\r\n Bartles Corner Road
\r\n Flemington, NJ\r\n 08822
\r\nVoice:\r\n(908) 806-7824 Fax (908) 806-3951
\r\nE-mail\r\nreplies to: katec@pmcsoftware.com
\r\nVisit our website at: www.pmcsoftware.com

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\r\n\r\n", "PostedDate": "2009-12-11T13:40:24.9-08:00", "UserRole": null, "MarkedAsAnswerDate": null }, { "Id": "266444", "ThreadId": "77608", "Html": "\r\n\r\n
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Also, files distribution: is uneven, some folders might have\r\n2 or 3 files, some dozens. The root has several hundred, otherwise the\r\nsubfolders mostly would have a max of a few dozen.

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Kate Carbery,\r\n Programmer / Analyst
\r\nPMC\r\nSoftware Inc.
\r\nSuite\r\n 11, 8\r\n Bartles Corner Road
\r\n Flemington, NJ\r\n 08822
\r\nVoice:\r\n(908) 806-7824 Fax (908) 806-3951
\r\nE-mail\r\nreplies to: katec@pmcsoftware.com
\r\nVisit our website at: www.pmcsoftware.com

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\r\n\r\n", "PostedDate": "2009-12-11T13:48:24.907-08:00", "UserRole": null, "MarkedAsAnswerDate": null } ]