Something fast, something quick. Perhaps deep C++ or lazy Qt.
time cp /home/saturn/data/* /home/saturn/tmp.d/.
real 0m15.815s
user 0m0.002s
sys 0m9.532s
time speed /home/saturn/data/* /home/saturn/tmp.d/.
real 0m8.657s
user 0m3.258s
sys 0m23.654s