Benchmark: timing 100 iterations of berkeley write, file write...
berkeley write: 11 wallclock secs ( 4.83 usr +  5.31 sys = 10.14 CPU) @  9.86/s (n=100)
file write: 68 wallclock secs ( 5.81 usr + 56.34 sys = 62.15 CPU) @  1.61/s (n=100)
                 Rate     file write berkeley write
file write     1.61/s             --           -84%
berkeley write 9.86/s           513%             --
Benchmark: timing 100 iterations of berkeley read, file read...
berkeley read:  5 wallclock secs ( 3.49 usr +  2.11 sys =  5.60 CPU) @ 17.86/s (n=100)
 file read:  4 wallclock secs ( 2.69 usr +  1.33 sys =  4.02 CPU) @ 24.88/s (n=100)
                Rate berkeley read     file read
berkeley read 17.9/s            --          -28%
file read     24.9/s           39%            --