Atom ION build
root ~ # strace -c python -c pass
% time     seconds  usecs/call     calls    errors syscall
------ ----------- ----------- --------- --------- ----------------
100.00    0.000017           4         4           ioctl
  0.00    0.000000           0       396           read
  0.00    0.000000           0       195       137 open
  0.00    0.000000           0        59           close
  0.00    0.000000           0        88        61 stat
  0.00    0.000000           0        89           fstat
  0.00    0.000000           0         3           lstat
  0.00    0.000000           0        82           mmap
  0.00    0.000000           0        13           mprotect
  0.00    0.000000           0        52           munmap
  0.00    0.000000           0        12           brk
  0.00    0.000000           0        68           rt_sigaction
  0.00    0.000000           0         1           rt_sigprocmask
  0.00    0.000000           0         1         1 access
  0.00    0.000000           0         1           execve
  0.00    0.000000           0         2           getdents
  0.00    0.000000           0        23        23 unlink
  0.00    0.000000           0         1         1 readlink
  0.00    0.000000           0         1           getrlimit
  0.00    0.000000           0         1           getuid
  0.00    0.000000           0         1           getgid
  0.00    0.000000           0         1           geteuid
  0.00    0.000000           0         1           getegid
  0.00    0.000000           0         1           arch_prctl
  0.00    0.000000           0         1           set_tid_address
  0.00    0.000000           0         1           openat
  0.00    0.000000           0         1           set_robust_list
------ ----------- ----------- --------- --------- ----------------
100.00    0.000017                  1099       223 total

RPi build:


root ~ # strace -c python -c pass
% time     seconds  usecs/call     calls    errors syscall
------ ----------- ----------- --------- --------- ----------------
 36.08    0.000188           1       228       169 open
 35.32    0.000184          61         3           lstat64
 28.60    0.000149           2        61           close
  0.00    0.000000           0       401           read
  0.00    0.000000           0        23        23 unlink
  0.00    0.000000           0         1           execve
  0.00    0.000000           0         1         1 access
  0.00    0.000000           0         8           brk
  0.00    0.000000           0         4           ioctl
  0.00    0.000000           0         1         1 readlink
  0.00    0.000000           0        53           munmap
  0.00    0.000000           0         1           uname
  0.00    0.000000           0        12           mprotect
  0.00    0.000000           0        68           rt_sigaction
  0.00    0.000000           0         1           rt_sigprocmask
  0.00    0.000000           0         1           getrlimit
  0.00    0.000000           0        77           mmap2
  0.00    0.000000           0       110        74 stat64
  0.00    0.000000           0        92           fstat64
  0.00    0.000000           0         1           getuid32
  0.00    0.000000           0         1           getgid32
  0.00    0.000000           0         1           geteuid32
  0.00    0.000000           0         1           getegid32
  0.00    0.000000           0         4           getdents64
  0.00    0.000000           0         1           fcntl64
  0.00    0.000000           0         1           set_tid_address
  0.00    0.000000           0         2           openat
  0.00    0.000000           0         1           set_robust_list
------ ----------- ----------- --------- --------- ----------------
100.00    0.000521                  1159       268 total
System call usage summary for 32 bit mode:
% time     seconds  usecs/call     calls    errors syscall
------ ----------- ----------- --------- --------- ----------------
   nan    0.000000           0         1           set_tls
------ ----------- ----------- --------- --------- ----------------
100.00    0.000000                     1           total