I don't know enough about the parser cache to give Daniel good advice on
his question:
That's another issue I wanted to raise: Platform
Engineeing is working on
switching ParserCache to JSON. For that, we have to make sure extensions
only put JSON-Serializable data into ParserOutput objects, via
setProperty() and setExtensionData(). We are currently trying to figure out
how to best do that for TemplateData.
TemplateData already uses JSON serialization, but then compresses the JSON
output, to make the data fit into the page_props table. This results in
binary data in ParserOutput, which we can't directly put into JSON. There
are several solutions under discussion, e.g.: [...(see Daniel's original
message for the list of ideas or propose your own)...]
But I see some people hiding in the back who might have some good ideas :)
This is just a bump to invite them to respond.