Using xml files for a web project.

I think the approach is viable.
It might be possible to improve performance by separating the XML into multiple documents (one per thread? one per user?), to reduce parsing time.
It might also be possible to consider a document database (eg mongodb), though that is not directly supported in CI - it is a candidate & not fully thought out feature for CI4.

Well, i will take a further look on mongoDB!

Thanks for the suggestions!

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if (sad() == true) {
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}