masters-pmf/java_speed_test/make_trace.sh

   1 (for i in $(seq 1000); do cat basic_record.dat; done) >tmp.dat
   2 (for i in $(seq 500); do cat tmp.dat; done) >trace_short.dat
   3 rm tmp.dat
   4 (for i in $(seq 10); do cat trace_short.dat; done) >trace_med.dat
   5 (for i in $(seq 10); do cat trace_med.dat; done) >trace_long.dat