Benchmark: timing 10 iterations of berkeley write, file write...
berkeley write: 96 wallclock secs (25.64 usr + 21.62 sys = 47.26 CPU) @  0.21/s 
(n=10)
file write: 58 wallclock secs (23.88 usr + 13.41 sys = 37.29 CPU) @  0.27/s (n=1
0)
               s/iter berkeley write     file write
berkeley write   4.73             --           -21%
file write       3.73            27%             --
Benchmark: timing 10 iterations of berkeley read, file read...
berkeley read: 163 wallclock secs (10.58 usr +  7.83 sys = 18.41 CPU) @  0.54/s 
(n=10)
 file read: 135 wallclock secs ( 8.21 usr +  6.12 sys = 14.33 CPU) @  0.70/s (n=
10)
              s/iter berkeley read     file read
berkeley read   1.84            --          -22%
file read       1.43           28%            --