Serialize and Deserialize memory issue.

[davkh]

Hi everybody. Here is the code on g#, which fill ram with about 1gb. And I think the problem is with serialize method. I need your help.

[Mattias_Ericsson]

Hi Davkh,

I tried to repeat your problem, but can't see any problem. I don't get any strange memory issues at all. What versions of LabVIEW, OS and G# are you using?

Mattias

PS

Please notice that there were a fix in Deserialization of the G# Framework 1.4.5 release

From Release Notes:

G# Framework 1.4.5

G# 1.5.1

* Bugfix in Deserialize() for XML. Clusters were not correctly parsed. Removed support for non-matching XML structures.

* Removed XMLIgnoreList().

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[davkh]

Please check test.vi. Put size to 10M. And some file path. When you run this vi, the 700mb ram memory is used and not cleared after the vi is finished.

[Mattias_Ericsson]

Hi,

Yes, I do see that LabVIEW increases memory. I do believe that LabVIEW is forced to create a lot of extra data copies. A known issues with LabVIEW. I do see one improvement I can do. In the serialization VI, please put a case structure around the "GetAggregatedObjects" VI as seen below. This is a very heavy recursive algorithm and is actually not need  if "include aggregates" isn't checked. Memory decrease a lot with this fix. In your code, please set "include aggregates" to FALSE. I will include this fix in the next release of G#.

Another option you have if memory is a problem is not to use an array directly as a an G# attribute, but put a DVR references to the array instead. Then, you can actually override the serialize and deserialization in G# and create your own serializer/deserialize (the G#Object serializer VIs are dynamic dispatch). See the attached modified example called "Test_2.vi" with the TestClass2.lvclass. Notice that I also fixed the property that read the array.

I hope this help.

Thanks,

Mattias

Message was edited by: Mattias_Ericsson

Image was wrong. Here is the correct from the upcoming release.

[davkh]

Could you please create for LV 2011. I'm using this version, so I can't open the project.

Thanks,

[Mattias_Ericsson]

Hi,

Oh, sorry. Here is a LV2011 version.

Mattias

[davkh]

Thanks for interesting solution.