11.22.3 Can you answer these questions?

11.22.3.1 Is there any way to speed up the multi-process xelatex compilation?
11.22.3.2 Wrong orientation of a \pic in a \pic
11.22.3.3 Source code of books written in Plain TeX
11.22.3.1 Is there any way to speed up the multi-process xelatex compilation?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=739896

On Windows, there are multiple .tex files that need to be compiled using xelatex, and these files are not related to each other. When multiple xelatex processes are started simultaneously to compile ... 
[xetex]
 
asked by e`\217\262ao\276\[CenterDot]c,\203\210https://tex.stackexchange.com/landing/r/digest?cta=user&id=384678 Score of 2
11.22.3.2 Wrong orientation of a \pic in a \pic

https://tex.stackexchange.com/landing/r/digest?cta=question&id=739816

Following some help provided here(Creating a serpentine), I integrated a streamer into an image, which I then integrated into a \pic. 
My problem is that when I request a rotation of this \pic, the ... 
[tikz-pgf] [tikz-pic]
 
asked by Nicolas https://tex.stackexchange.com/landing/r/digest?cta=user&id=231550 Score of 1
11.22.3.3 Source code of books written in Plain TeX

https://tex.stackexchange.com/landing/r/digest?cta=question&id=740228

In the book 'A Beginner's Book to TeX' by Raymond Seroul and Silvio Levy 
it is mentioned that it was typeset using TeX, so I searched for its source code, but I couldn't find it. 
Are there any books ... 
[plain-tex]
 
asked by Mouad All https://tex.stackexchange.com/landing/r/digest?cta=user&id=197343 Score of 1