Preparing files...
Binary unit = one byte
Text unit = one character (utf8-decoded)

** Binary input **

[ 400KB ] read one unit at a time...                   2.49 MB/s
[ 400KB ] read 20 units at a time...                   45.1 MB/s
[ 400KB ] read 4096 units at a time...                  647 MB/s

[  20KB ] read whole contents at once...                857 MB/s
[ 400KB ] read whole contents at once...               3543 MB/s
[  10MB ] read whole contents at once...                993 MB/s

[ 400KB ] seek forward one unit at a time...          0.521 MB/s
[ 400KB ] seek forward 1000 units at a time...          505 MB/s
[ 400KB ] alternate read & seek one unit...            2.09 MB/s
[ 400KB ] alternate read & seek 1000 units...           469 MB/s

** Text input **

[ 400KB ] read one unit at a time...                   2.34 MB/s
[ 400KB ] read 20 units at a time...                   32.6 MB/s
[ 400KB ] read one line at a time...                   78.1 MB/s
[ 400KB ] read 4096 units at a time...                  131 MB/s

[  20KB ] read whole contents at once...                127 MB/s
[ 400KB ] read whole contents at once...                165 MB/s
[  10MB ] read whole contents at once...                131 MB/s
   warning: test above used only 85% CPU, result may be flawed!

[ 400KB ] seek forward one unit at a time...          0.125 MB/s
[ 400KB ] seek forward 1000 units at a time...          118 MB/s

** Binary append **

[  20KB ] write one unit at a time...                  1.01 MB/s
[ 400KB ] write 20 units at a time...                  19.1 MB/s
[ 400KB ] write 4096 units at a time...                2069 MB/s
[  10MB ] write 1e6 units at a time...                 2353 MB/s

** Text append **

[  20KB ] write one unit at a time...                  1.63 MB/s
[ 400KB ] write 20 units at a time...                    22 MB/s
[ 400KB ] write 4096 units at a time...                 206 MB/s
[  10MB ] write 1e6 units at a time...                  207 MB/s

** Binary overwrite **

[  20KB ] modify one unit at a time...                 1.01 MB/s
[ 400KB ] modify 20 units at a time...                 18.8 MB/s
[ 400KB ] modify 4096 units at a time...                521 MB/s

[ 400KB ] alternate write & seek one unit...          0.231 MB/s
[ 400KB ] alternate write & seek 1000 units...          209 MB/s
[ 400KB ] alternate read & write one unit...           1.37 MB/s
[ 400KB ] alternate read & write 1000 units...          147 MB/s
   warning: test above used only 75% CPU, result may be flawed!

** Text overwrite **

[  20KB ] modify one unit at a time...                0.587 MB/s
[ 400KB ] modify 20 units at a time...                 9.51 MB/s
[ 400KB ] modify 4096 units at a time...                158 MB/s