malloc & free
                   op/s     98%     96%     75%     med     avg     min     max  
malloc/0        2570694     391     391     391     391     389     343    5341  
free/0          3194888     313     313     313     313     312     271    5029  
malloc/1        3649635     277     277     277     271     274     259    3982  
free/1          4366812     229     229     229     229     229     217    4030  
malloc/16       2358490     427     427     427     421     424     415    4162  
free/16         2824858     355     355     355     355     354     343    4241  
malloc/64       2358490     427     427     427     421     424     409    4385  
free/64         2906976     355     349     343     343     344     343    4427  
malloc/256      2341920     427     427     427     421     427     403   76067  
free/256        2898550     361     349     349     343     345     337    4090  
malloc/1024     2380952     433     427     421     415     420     391   21552  
free/1024       2849002     361     361     355     349     351     331    3603  
malloc/4096     2352941     433     433     427     427     425     301    4463  
free/4096       2857142     355     355     355     349     350     241     595  
malloc/65536    2506265     439     439     409     397     399     301    4042  
free/65536      2976190     355     355     343     343     336     241     559  
malloc/1048576  2610966     427     421     397     397     383     307   22280  
free/1048576    3134796     361     361     343     343     319     223    3783  
malloc/2097152  2457002     427     421     415     397     407     391   19591  
free/2097152    2881844     355     355     355     343     347     283    4211  
malloc/4194304  2427184     427     421     415     403     411     397   21702  
free/4194304    2881844     355     355     355     343     347     253    3922  

/dev/zero → /dev/null
                      op/s        98%        96%        75%        med        avg        min        max  
read/0           200000000          6          6          6          6          5          0        313  
write/0             657462       1528       1522       1522       1522       1521       1510       5600  
read/1              640614       1570       1564       1558       1558       1560       1552       4842  
write/1             670241       1510       1492       1492       1492       1492       1480       4728  
read/65536           75414      13281      13269      13257      13257      13260      13203      18923  
write/65536         612745       1642       1642       1636       1636       1631       1606       4391  
read/1048576          5360     190100     186419     186335     186287     186554     186088     269722  
write/1048576       585137       1726       1714       1708       1708       1709       1690       2532  
read/4194304           569    1780948    1752479    1741947    1737059    1755683    1726578    3419183  
write/4194304       228623       4776       4716       4523       4358       4374       3651       5029  
read/16777216          117    8440895    8419066    8394808    8389677    8502278    8373280   19505703  
write/16777216      226911       4788       4680       4529       4424       4407       3639       4800  
read/67108864           29   35508450   33615748   33569853   33549080   34049504   33484295   81908733  
write/67108864      231857       4698       4662       4409       4289       4313       3862       4704  
read/268435456           7  135806663  134427155  134372941  134048765  136113859  133935200  327633176  
write/268435456     236350       4656       4535       4295       4177       4231       3621      10388