Maximize Qt compile speed

unzip src package into somewhere (eg: c:\dev\qt\4.6.3src )
create target directory (eg: c:\dev\qt\4.6.3x64 )
copy mkspecs\ to target directory
C:\dev\Qt\4.6.3src>configure -prefix c:\dev\Qt\4.6.3x64 -opensource -native-gestures -nomake examples -nomake demos -no-qt3support -no-webkit -saveconfig testconfig
replace -nologo -Zm200 to -nologo -MP -Zm200 from Makefile.*
nmake sub-src
nmake sub-tools release
nmake install

now it's ok to delete source directory
copy .qmake.cache to target directory