about the speed and quality of soffice's convert doc/docx to pdf

I am using the soffice of libreoffice6.3 to convert doc/docx to pdf, but met with several problems below:

  1. How can I avoid the revision mode information in doc/docx also be converted to pdf?
  2. Sometimes it cost me 3-5 seconds to convert a document (less than 10 pages), is there any way to speed up the conversion stage?
  3. Will the format be changed after conversion? When will it happen?

Look forward for your reply, thanks so much!

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