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Date Posted: 07:58:54 03/23/06 Thu
Author: John Elrick
Subject: Update: The time cost for AppendToStream with TIFF appears to be growing non-linearly
In reply to: John Elrick 's message, "The time cost for AppendToStream with TIFF appears to be growing non-linearly" on 13:56:38 03/22/06 Wed

>I have run into a snag and don't know what may be
>going on. We have need to generate multipage TIFF
>files. I'm using AppendToStream and a TMemoryStream
>as part of the testing.

As an update, the problem appears to lie within TMemoryStream itself...or more specifically in the methods being used to write the images to the stream.

I substituted a TFileStream for the TMemoryStream and the time dropped below 1 second for the same operation I listed as taking a cumulative total of over 19 seconds using the MemoryStream.

So, it's actually faster to AppendToStream to a temporary file stream and then load the file into the Memory Stream than it is to AppendToStream directly to the Memory Stream.

John Elrick
Fenestra Technologies

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