XML vs JS in Qt. What is more "native" for Qt?

bogong

@jksh Is there any example of using CBOR? Be honest - I've never heard about it ... And the same questions about Long Term Storing, how about it?

bogong

@mrjj @JKSH and others ... Thanks for replies, but never the less ... What about topic of this thread? What is more native JSON and XML?

mrjj

@bogong
None of them is more native than the other.
Both is just classes using Qt types.

bogong

@mrjj Thx

mrjj

@bogong
Just as info.
we tested XML / JSON for our project.
In most cases, xml is more verbose and we found json
generally nicer to work with.
Its easy to handwrite some json.
xml, not so much.

bogong

@mrjj For hand-writing it's mater of experience only. I've started to use XML more than 10 years ago and beside all of it huge experience in HTML/CSS. For me doesn't matter at all which is better for handwriting. BTW - Microsoft *.docx format it's ZIPed XML. And a lot of applications using XML for data exchange. But it's only historically, XML appeared earlier than JSON especially in enterprise applications.

mrjj

@bogong
ok. also a good xml editor helps with all the end tags.

Btw i forgot to ask

How much data do you plan to save ?

bogong

@mrjj said in XML vs JS in Qt. What is more "native" for Qt?:

How much data do you plan to save ?

It's unpredictable and depend on situation. Might be 2 bite might be + 2Gb

mrjj

@bogong
ok.
please test with 2GB json/xml before deciding.
It might not have acceptable performance for your use case.

bogong

@mrjj sure, I know it - this is the main reason to question about "more native".

mrjj

@bogong
Well both will be slow with a 2GB file.
However, XML has also has
https://doc.qt.io/qt-5/qxmlsimplereader.html#details
which is a SAX interface that reduces the memory requirements
compared to the XML Dom parser / json that will fully
populate an internal "tree" of the file.

Also, Qt is a framework. Not a language so all its classes are
the same level of "native". :)

bogong

@mrjj I might be wrong in term "native". I mean what is historically more developed and used solution in Qt.

mrjj

@bogong
I think they are both equal in that regards.
The XML is older (i think) then JSON but could not find the exact info.
Internally Qt uses binary / DataStreams.

So it seems to save to choose between json/xml based on performance and
memory use concerns + your personal experience with xml.