Benchmark: timing 1 iterations of uv_fits_double3, uv_fits_double_bitfiddle...
uv_fits_double3:  0 wallclock secs ( 0.44 usr +  0.00 sys =  0.44 CPU) @  2.29/s (n=1)
            (warning: too few iterations for a reliable count)
uv_fits_double_bitfiddle:  1 wallclock secs ( 0.94 usr +  0.00 sys =  0.94 CPU) @  1.07/s (n=1)
            (warning: too few iterations for a reliable count)
12000001 12000001