Sizeof node_modules/ – Performance testing

Detailed Stats — Root Directory

The command:

cd ~/Documents
/usr/bin/time -lp ~/Documents/Personal/byte-bin/shell/sizeof_node_modules.sh > /dev/null

Original Edition

real 34.18
user 0.92
sys 13.49
             3145728  maximum resident set size
                   0  average shared memory size
                   0  average unshared data size
                   0  average unshared stack size
                5104  page reclaims
                  75  page faults
                   0  swaps
                   0  block input operations
                   0  block output operations
                   0  messages sent
                   0  messages received
                   5  signals received
              109160  voluntary context switches
               54699  involuntary context switches
            25517294  instructions retired
            20511231  cycles elapsed
             1491712  peak memory footprint

Latest Performance Optimized (bash)

real 12.65
user 0.18
sys 4.09
             3276800  maximum resident set size
                   0  average shared memory size
                   0  average unshared data size
                   0  average unshared stack size
                1210  page reclaims
                  25  page faults
                   0  swaps
                   0  block input operations
                   0  block output operations
                   0  messages sent
                   0  messages received
                   0  signals received
               68323  voluntary context switches
                 633  involuntary context switches
            10843535  instructions retired
             6067801  cycles elapsed
             1016512  peak memory footprint

Latest Performance Optimized (zsh)

real 13.03
user 0.18
sys 4.18
             2850816  maximum resident set size
                   0  average shared memory size
                   0  average unshared data size
                   0  average unshared stack size
                1418  page reclaims
                  20  page faults
                   0  swaps
                   0  block input operations
                   0  block output operations
                   0  messages sent
                   0  messages received
                   3  signals received
               68336  voluntary context switches
                1559  involuntary context switches
            22563567  instructions retired
            16826761  cycles elapsed
             1377024  peak memory footprint

Detailed Stats — Simple Directory

The command:

cd ~/Documents/Personal/byte-bin/shell
/usr/bin/time -lp sizeof_node_modules.sh > /dev/null

Latest Edition

real 0.00
user 0.00
sys 0.00
             2146304  maximum resident set size
                   0  average shared memory size
                   0  average unshared data size
                   0  average unshared stack size
                 958  page reclaims
                  17  page faults
                   0  swaps
                   0  block input operations
                   0  block output operations
                   0  messages sent
                   0  messages received
                   3  signals received
                  24  voluntary context switches
                  44  involuntary context switches
            22624389  instructions retired
            11315148  cycles elapsed
             1426176  peak memory footprint

Individual Steps

The command:

cd ~/Documents
/usr/bin/time -p ~/Documents/Personal/byte-bin/shell/sizeof_node_modules.sh > /dev/null

Original Edition

       12.43 real         0.26 user         5.55 sys  # find **/node_modules -type d
       21.25 real         0.08 user         0.00 sys  # grep -E "node_modules$"
       21.25 real         0.00 user         0.00 sys  # grep -vE "node_modules/"
       21.28 real         0.00 user         0.02 sys  # xargs -I {} echo '"{}"'
       31.73 real         0.15 user         3.51 sys  # xargs du -hs
       31.73 real         0.00 user         0.00 sys  # sort -hr

# Overall shell command
real 31.74
user 0.91
sys 13.13

Optimized Edition

        2.21 real         0.02 user         0.61 sys  # find $DIR -type d -name "node_modules" -prune -print0
       12.63 real         0.15 user         3.50 sys  # xargs -0 du -hs
       12.64 real         0.00 user         0.00 sys  # sort -hrS 4K

# Overall shell command
real 12.93
user 0.18
sys 4.12