Never heard that someone is generating PDF documents at that pace. I'm working on a product that is used for mass PDF reporting based on Puppeteer. With nightly jobs, caching, and parallel processing, the performance is ok.
We're having problems because until now PDFs are being generated by the ERP system, and it can't keep pace. I know there's a Dev team working on a microservice for PDF generation, but never thinked about doing it with Typst.
I think I'm going to send them @mr-karan link.
We also render shipping labels in PDF, and we have to be VERY strict with that. But we're still not touching that, as that process is not at slow and problematic as the invoicing one.
the end result when you open the file is still a regular pdf. it's just encoded with some areas unpacked