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POMemory leak in VB file reader
 

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  1. POMemory leak in VB file reader
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    <p>I'm currently coding a file reader for fixed-width tables in VB, and the compiled application seems to be sucking down memory like there's no tomorrow. I'm working with a series of ~50 megabyte files, but after running through several, the process starts taking up about 200+ megabytes of RAM, which is way more than it should.</p> <p>I've done some poking around, and I <em>think</em> the issue is the call to NewRow(), but don't take my word for it.</p> <p>Does anyone have some tips for optimizing this? If the problem's with the NewRow() call, is there a way of clearing this out? </p> <p>Code follows below:</p> <pre><code>Function LoadFixedWidthFileToDataTable(ByVal filepath As String, ByRef Colnames() As String, ByRef colwidth() As Integer) As DataTable Dim filetable As New DataTable For Each name As String In Colnames filetable.Columns.Add(name) Next Dim loadedfile As StreamReader Try loadedfile = New StreamReader(filepath) Catch io As IOException MsgBox(io.Message) Return Nothing Exit Function End Try Dim line As String = loadedfile.ReadLine Dim filerow As DataRow = filetable.NewRow Dim i As Integer = 0 While Not loadedfile.EndOfStream line = loadedfile.ReadLine filerow = filetable.NewRow i = 0 For Each colsize As Integer In colwidth Try filerow(i) = line.Substring(0, colsize) line = line.Remove(0, colsize) Catch ex As ArgumentOutOfRangeException ''If the line doesn't match array params Exit For End Try i = i + 1 Next filetable.Rows.Add(filerow) End While loadedfile.Close() Return filetable End Function </code></pre>
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    1. USJohn Koerner
    1. USlyrisey
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