30ms is pretty slow

  $ for i in {1..5}; do /usr/bin/time zsh -i -c exit; done
        0.01 real         0.00 user         0.00 sys
        0.01 real         0.00 user         0.00 sys
        0.00 real         0.00 user         0.00 sys
        0.00 real         0.00 user         0.00 sys
        0.00 real         0.00 user         0.00 sys