-O3/ -O2 / java results

$ gcc -O2 -msse4.2 sudoku_v1.c
$for i in `seq 1 10`; do ./a.out  < sud500 > /dev/shm/o; done;
Elapsed 7999.31
Elapsed 7970.00
Elapsed 7985.64
Elapsed 7961.64
Elapsed 8007.81
Elapsed 8010.82
Elapsed 7959.17
Elapsed 7997.59
Elapsed 7894.28
Elapsed 7946.76


$ gcc -O3 -msse4.2 sudoku_v1.c
$for i in `seq 1 10`; do ./a.out  < sud500 > /dev/shm/o; done;
Elapsed 7831.10
Elapsed 7694.53
Elapsed 7565.37
Elapsed 7605.28
Elapsed 7625.31
Elapsed 7611.24
Elapsed 7619.79
Elapsed 7540.54
Elapsed 7682.54
Elapsed 7569.86



$ for i in `seq 1 10`; do java -server -XX:CompileThreshold=1450  -XX:+UseG1GC -Dwarmup=2500  -cp . sss.Sudoku in < sud500 > /dev/shm/o; done;
Elapsed+Read: 7986.50
Elapsed+Read: 7895.98
Elapsed+Read: 7927.69
Elapsed+Read: 7930.34
Elapsed+Read: 7828.09
Elapsed+Read: 7829.72
Elapsed+Read: 7947.33
Elapsed+Read: 7931.43
Elapsed+Read: 7889.00
Elapsed+Read: 7774.82