title: Golang - why do compilations on similar machines result in significantly different binary file sizes?
body: <p>I have a gorilla/mux based web service written in Golang.
  I've observed that the exact same code produces a binary of size more than 10 MB on my Windows 10 Pro Machine while its about 7 MB on my colleague's Windows 10 Pro Machine.
  On yet another colleague's MacBook Pro running OS X Yosemite, the binary is just a bit over 11 MB in size.
  What does this binary actually contain?!</p>