@famubu @tallship For me, #Docview is fast enough, and bundled with #Emacs. There is usually 2-5 seconds delay to open a pdf. #pdftools doesn't have any delay and . But still, #Docview is more stable IMO. However, you'll need to install a few command line tool to use #Docview.

@klaatu @tallship I used to use #pdftools, but switched later to #docview, which is built-in into #emacs and more stable IMHO.