$t_{s t e p}^{c}$ (msecs)	$t_{s t e p}^{f}$ (usecs)	$N^{f}$	Execution time (msecs)		Speedup
$t_{s t e p}^{c}$ (msecs)	$t_{s t e p}^{f}$ (usecs)	$N^{f}$	Sequential	CUDA	Speedup
20.0	200.0	128	1.778	0.183	9.7
10.0	100.0	256	3.594	0.242	15
5.0	50.0	512	7.105	0.283	25