Berker Peksag added the comment: I get the following output when I try Python 3.5.1 docs: $ pdfinfo using.pdf Title: Subject: Keywords: Author: Creator: LaTeX with hyperref package Producer: pdfTeX-1.40.14 CreationDate: Sat Apr 2 00:17:54 2016 ModDate: Sat Apr 2 00:17:54 2016 Tagged: no Pages: 69 Encrypted: no Page size: 595.276 x 841.89 pts (A4) File size: 368343 bytes Optimized: no PDF version: 1.5 ---------- nosy: +berker.peksag stage: -> needs patch type: resource usage -> behavior versions: +Python 3.5, Python 3.6 -Python 3.3 _______________________________________ Python tracker <report@bugs.python.org> <http://bugs.python.org/issue5901> _______________________________________