Build and install it

1. Install the DevKit and add it's artifacts to your PATH

    C:\w32time-git>\DevKit\devkitvars.bat
    Adding the DevKit to PATH...
   

2. Update the Makefile for your needs. For example, rename the exe and add it to a directory already on your PATH

    C:\w32time-git>vim Makefile
    # mod to this: cp w32time.exe C:\tools\timer.exe
   

3. Build and install it

    C:\w32time-git>make install
    gcc -O2 -o w32time.exe -Wall w32time.c
    w32time.c: In function 'main':
    w32time.c:109:7: warning: format '%u' expects argument of type 'unsigned int', but argument 3 has type 'DWORD' [-Wformat]
    w32time.c:118:7: warning: format '%u' expects argument of type 'unsigned int', but argument 3 has type 'DWORD' [-Wformat]
    strip -s w32time.exe
    cp w32time.exe C:\tools\timer.exe
   

4. Test it

    C:\>timer echo Hello Ruby!
    Hello Ruby!
    real    0.052
    system  0.015
    user    0.000
   

Use it

C:\>timer ruby -ve "10_000_000.times { |i| i**3 }
ruby 1.9.3p0 (2011-11-08 revision 33661) [i386-mingw32]
real    9.079
system  0.015
user    9.048

C:\>timer \jruby\bin\jruby.exe -ve "10_000_000.times { |i| i**3 }
jruby 1.6.5 (ruby-1.8.7-p330) (2011-10-25 9dcd388) (Java HotSpot(TM) Client VM 1.7.0_01) [Windows 7-x86-java]
real    5.304
system  0.202
user    5.054

C:\>timer lua -e "for i = 0,10000000 do r=i^3 end"
real    1.185
system  0.000
user    1.170