bazel system calls on incremental build

gistfile1.txt

$ cut -d'(' -f 1 /tmp/log | grep -av attached | grep -aoE '\] [a-zA-Z0-9]+' | sort | uniq -c
      4 ] accept4
     18 ] chmod
    194 ] clone
    427 ] close
     50 ] epoll
    192 ] exit
     12 ] fcntl
    413 ] fstat
  35636 ] futex
     32 ] getdents64
    194 ] getpid
   1939 ] getrusage
      4 ] getsockname
      6 ] getsockopt
   4533 ] gettid
    189 ] lstat
    194 ] madvise
     14 ] mkdir
    478 ] mmap
    666 ] mprotect
     84 ] munmap
    425 ] openat
    194 ] prctl
    534 ] read
     26 ] readlink
      2 ] rename
      8 ] rmdir
    798 ] rt
    402 ] sched
    194 ] set
      4 ] setsockopt
     98 ] stat
     12 ] symlink
    240 ] sysinfo
      6 ] timerfd
      6 ] times
     31 ] unlink
      2 ] unlinkat
     90 ] write
     39 ] writev