An alternative to using slowNice3.c is to adjust (the typically default) niced 
frequency policy of you linux system.

To do this, open a command shell and inspect a file 
in /sys/devices/system/cpu/cpufreq.
In the terminal type:

cd /sys/devices/system/cpu/cpufreq
ls
cd ondemand
ls
more ignore_nice_load

if you cpu-governor is "conservative" rather than "ondeman"--as was assumed above,
then instead type
pico conservative/ignore_nice_load

if the value is set to "0" you should set it to 1 instead, using a text editor such as 
pico.