Very high (5GB+) memory usage when loading VSD Diagram with background pages

Aspose.Diagram Product Family
1

PBD00-93469.7z (4.7 MB)

Using Aspose Diagram .NET, the attached VSD file uses over 5 GB of RAM/memory when opening (compared to under 1GB for MS Visio).

The Diagram has 2 actual pages with 39 background pages.

2 questions:

  1. Can we load this diagram with less memory usage?
  2. How can we handle background pages so it is exported to PDF like MS Visio (i.e. 2 non-background pages only)?

Please advise.

Thank you,
Mark

2

@markmanley.adlib
Thanks for the template file.
After an initial testing, I am able to reproduce the issue as you mentioned by using your template file. I found an issue with the high memory usage when loading vsd.

Please try this sample code:

        Aspose.Diagram.Saving.PdfSaveOptions o = new Aspose.Diagram.Saving.PdfSaveOptions();
        o.SaveFormat = SaveFileFormat.Pdf;
        o.SaveForegroundPagesOnly = true;

We have opened the following new ticket(s) in our internal issue tracking system and will deliver their fixes according to the terms mentioned in Free Support Policies.

Issue ID(s): DIAGRAMNET-53776

You can obtain Paid Support Services if you need support on a priority basis, along with the direct access to our Paid Support management team.

3

Thank you! If and when the fix is delivered, will there be a notification on this thread?

4

@markmanley.adlib
Our issue tracking system is not public. However, you can check the status of issue at the bottom of this thread under heading “Issues Status”.
We will be sure to inform you via this forum thread once there is an update available on it.
Thanks.

5

The issues you have found earlier (filed as DIAGRAMNET-53776) have been fixed in this update. This message was posted using Bugs notification tool by philip.zhou

6

Hi there,

I tried version 25.8, and I see that while much better and processes faster (with SaveForegroundPagesOnly on), it still peaks at a whopping 3.6 GB of memory.

image.png (978 Bytes)

7

@markmanley.adlib

At present, we have reduced memory consumption by roughly 50%. However, given the differences in algorithms, our performance is not yet on par with Microsoft’s. We will further optimize memory usage in subsequent updates.
In upcoming versions, we will provide an option to enable/disable loading background pages .

We have opened the following new ticket(s) in our internal issue tracking system and will deliver their fixes according to the terms mentioned in Free Support Policies.

Issue ID(s): DIAGRAMNET-53796

You can obtain Paid Support Services if you need support on a priority basis, along with the direct access to our Paid Support management team.

8

The issues you have found earlier (filed as DIAGRAMNET-53796) have been fixed in this update. This message was posted using Bugs notification tool by philip.zhou

9

@markmanley.adlib
Please try this sample code to set loadfilter:

   Aspose.Diagram.LoadOptions lo = new Aspose.Diagram.LoadOptions();
   lo.LoadFormat = LoadFileFormat.Vsd;
   Aspose.Diagram.LoadFilter f = new Aspose.Diagram.LoadFilter();    
   f.LoadDataFilterOptions = Aspose.Diagram.LoadDataFilterOptions.ForegroundPage;
   lo.LoadFilter = f;

   Diagram diagram1 = new Diagram("PBD00-93469.vsd", lo);
   Aspose.Diagram.Saving.PdfSaveOptions o = new Aspose.Diagram.Saving.PdfSaveOptions();
   o.SaveFormat = SaveFileFormat.Pdf;
   o.SaveForegroundPagesOnly = true;
   diagram1.Save("out.pdf", o);
10

Great! It seems to spike to over 1GB of RAM (but not for long), so it is much better and faster.

11

@markmanley.adlib
Thanks for following the suggested workaround.
Please feel free to contact us in case you have further comments or questions.