[Cuis-dev] Design idea with persistence of objects

[Hernán Wilkinson]

Hi Hilaire,
 have you tried doing a lazy loading? Do you need to load all the documents
at once?
 You could use proxies for the persistent objects you want to load
lazily and only read the object from disk when needed, as ORM do when
persisting in relational databases.

 I hope this helps.
 Hernan.

On Mon, Sep 21, 2026 at 6:57 AM Luciano Notarfrancesco via Cuis-dev <
cuis-dev at lists.cuis.st> wrote:

> Image segments can be useful for superfast save/load of a graph of
> objects. I dont know how they compare with the serialization you are doing,
> it might be worth doing some tests to compare.
>
> On Sun, 20 Sep 2026 at 17:53 Hilaire Fernandes via Cuis-dev <
> cuis-dev at lists.cuis.st> wrote:
>
>> Hi,
>>
>> I am looking for idea and design idea regarding persistence of objects.
>>
>> In the DyboApp, the user data are saved in a tree of objects
>>
>>    - userData (root)
>>       - schools
>>          - classGroups
>>             - courses
>>                - topics
>>                   - documents
>>
>> The most complex data are the documents. A document represents a metaphor
>> of pages with handwritten notes, and an arbitrary number of tools, dropped
>> pictures from the host filer, etc. Moreover a page may have a model as
>> simple as a background color, or a particular design as horizontal lines,
>> grid, graph paper or a pdf.
>>
>> Because of this complexity, I serialize the documents in individual
>> compressed files, it is fast at saving and loading. Because serializing the
>> userData root save all the data by default, each Document instances in the
>> documents collection (at the bottom of the tree above), are in fact
>> DiskProxy containing the path to the independently serialized Document
>> instances.
>>
>> This works well when saving the whole userData or an individual Document.
>> However, at start-up, accessing the userData load everything, which is fine
>> expect for the documents collection and its Documents instances (through
>> the Disk proxy). As the documents collection, it may become slow when I
>> will have several hundreds of documents.
>>
>> I have some ideas how to improve this, but I am interested to read other
>> opinions and experience on the matter.
>>
>> Thanks
>>
>>
>> -- http://mamot.fr/@drgeo
>>
>> --
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>>
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-- 

*Hernán WilkinsonAgile Software Development, Teaching & Coaching*
*Phone: +54-011*-4893-2057
*Twitter: @HernanWilkinson*
*site: http://www.10Pines.com <http://www.10pines.com/>*
Address: Alem 896, Floor 6, Buenos Aires, Argentina
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