home:   http://www.sumatrapdfreader.org/free-pdf-reader.html
source: https://github.com/sumatrapdfreader/sumatrapdf

build:
Open the sln file in the ready/vs2015 directory.
VS2015 will ask you to install support for compiling
Windows XP applications. After this, compiling takes a while
and produces warnings, but does result in a working .exe.

optimize:
Improve the performance of the pdf viewer for a
complex pdf file.