title: Fast Qt C++ compile on windows
body: <p>I have a large project that uses the Qt framework and am trying to find the fastest way to compile it on my Windows install.</p>
  
  <p>On my linux machine at home I use 3 year old Linux Mint setup with a dual core <em>(the machine is 3 years old not Linux Mint install)</em>, using: make -j2 both cores are used full(ish) and compiles the code relatively quick, around 10 minutes from clean build.</p>
  
  <p>However on my work Windows PC which is 2.0 GHz Intel Core 2 Quad (XP) I can never seem to get the compiles to be as fast as my Linux box.  The developer docs for the program recommend using Visual Studio C++ using the project file generated from cmake but that only seems to use one core and takes well over a hour to compile vs about 10 minutes (from clean build) on my Linux install.</p>
  
  <p>I have tred using <a href="https://wiki.qt.io/Jom#Download_the_binary_package" rel="nofollow noreferrer">jom</a> but even when using all the cores it still takes around an hour and half because it only seems to use small amounts of cpu on each core.</p>
  
  <p>Doesn't make sense to me that my old Linux machine builds quick but the quad core just slumps along.    </p>