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<p>Hi Folks,</p>
<p>If users don't need all their documents loaded by default, I'd
try lazy loading as Hernán says. Instead of a DiskProxy, store the
information for the DiskProxy (file name or FileEntry I guess).
Perhaps create a DocumentFile object that stands in place of the
Document, so the user can see and manage all their documents
before loading them. And get the DocumentFile to load the actual
Document when the user actually needs it.</p>
<p>HTH.</p>
<div class="moz-cite-prefix">On 2026-09-21 8:39 AM, Hernán Wilkinson
via Cuis-dev wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAGgF3Gzw0m6gFBsH6gc2n=_Wv67Pdyw+FUE5AhywEFdt02GTwg@mail.gmail.com">
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<div dir="ltr">Hi Hilaire,
<div> have you tried doing a lazy loading? Do you need to load
all the documents at once? </div>
<div> 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.</div>
<div><br>
</div>
<div> I hope this helps.</div>
<div> Hernan.</div>
</div>
<br>
<div class="gmail_quote gmail_quote_container">
<div dir="ltr" class="gmail_attr">On Mon, Sep 21, 2026 at
6:57 AM Luciano Notarfrancesco via Cuis-dev <<a
href="mailto:cuis-dev@lists.cuis.st" moz-do-not-send="true"
class="moz-txt-link-freetext">cuis-dev@lists.cuis.st</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote"
style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div dir="auto">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.</div>
<div><br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Sun, 20 Sep 2026 at
17:53 Hilaire Fernandes via Cuis-dev <<a
href="mailto:cuis-dev@lists.cuis.st" target="_blank"
moz-do-not-send="true" class="moz-txt-link-freetext">cuis-dev@lists.cuis.st</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote"
style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div bgcolor="#FFFFFF">
<p><font size="4" style="color:rgb(0,0,0)">Hi, </font></p>
<p><font size="4" style="color:rgb(0,0,0)">I am
looking for idea and design idea regarding
persistence of objects.</font></p>
<p><font size="4" style="color:rgb(0,0,0)">In the
DyboApp, the user data are saved in a tree of
objects</font></p>
<ul>
<li><font size="4" style="color:rgb(0,0,0)">userData
(root)</font></li>
<ul>
<li><font size="4" style="color:rgb(0,0,0)">schools</font></li>
<ul>
<li><font size="4" style="color:rgb(0,0,0)">classGroups</font></li>
<ul>
<li><font size="4" style="color:rgb(0,0,0)">courses</font></li>
<ul>
<li><font size="4" style="color:rgb(0,0,0)">topics</font></li>
<ul>
<li><font size="4"
style="color:rgb(0,0,0)">documents</font></li>
</ul>
</ul>
</ul>
</ul>
</ul>
</ul>
<p><font size="4" style="color:rgb(0,0,0)">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.</font></p>
<p><font size="4" style="color:rgb(0,0,0)">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.</font></p>
<p><font size="4" style="color:rgb(0,0,0)">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.</font></p>
<p><font size="4" style="color:rgb(0,0,0)">I have some
ideas how to improve this, but I am interested to
read other opinions and experience on the matter.</font></p>
<p><font size="4" style="color:rgb(0,0,0)">Thanks</font></p>
<p><font size="4" style="color:rgb(0,0,0)"><br>
</font></p>
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<div style="font-size:12.8px"><span
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style="font-size:8pt"><span
style="font-size:small"><font size="2"><span
style="font-weight:normal"><span
style="font-weight:bold">Hernán
Wilkinson</span><br>
Agile Software Development, Teaching
& Coaching</span></font></span></span></strong></span></div>
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<pre class="moz-signature" cols="72">--
Juan Vuletich
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github.com/jvuletich
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