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I've noticed that when converting to PDF using LibreOffice, the CPU usage is always 100%. Looking at the `TransformDocAdvLibreOffice` class, I see that it uses invisible mode by default, but some online sources recommend running LibreOffice in headless mode.

However, they also recommend using LibreOffice as a service listening on a port, for example:

`soffice --headless --accept="socket,host=127.0.0.1,port=2002;urp;" --nofirststartwizard`

However, your documentation only mentions this for OpenOffice. Based on your experience, what is the best LibreOffice configuration for converting to PDF, or do you recommend using DOMPDF?

I'm using Phpdocx 15, and I create the documents through a Laravel job. Several users can create a document, and most of the time it's quite long, at least 100 pages. Converting to PDF using LibreOffice is becoming a bottleneck, and services are slowing down (web server, PHP, etc.).

Note: I'm not using concurrent conversion; I'm not clear on how to implement it.

Thank you for your attention.