Simple shell script to generate readable performance data

timeit.sh

#!/usr/bin/env sh

# (C) Sarah Mount http://snim2.org

#
# Execute a given command and print performance information in a readable manner.
#
# Example:
#
# ./timeit.sh gcc hello.c 
# ----------------- Process ----------------- 
# Executed: gcc hello.c
# 0 exit status 
# ----------------- Time ----------------- 
# 0:00.04 real (wall clock) time 
# 0.02 user mode time 
# 0.01 sys (kernel mode) time
# ----------------- Memory ----------------- 
# 0kB total memory used
# 0kB data used 
# 0kB share text 
# 0kB unshared stack size 
# 0kB average set size 
# 21424kB maximum set size 
# ----------------- Caching ----------------- 
# 18 number of involuntarily context-switches 
# 13 number of voluntarily context-switches 
# 4110 number of minor page faults 
# 0 number of major page faults 
# 0 number of times the process was swapped out 
# ----------------- System -----------------
# 4096 system page size

time --format="----------------- Process ----------------- \nExecuted: %C\n%x exit status \n----------------- Time ----------------- \n%E real (wall clock) time \n%U user mode time \n%S sys (kernel mode) time\n----------------- Memory ----------------- \n%KkB total memory used\n%DkB data used \n%XkB share text \n%pkB unshared stack size \n%tkB average set size \n%MkB maximum set size \n----------------- Caching ----------------- \n%c number of involuntarily context-switches \n%w number of voluntarily context-switches \n%R number of minor page faults \n%F number of major page faults \n%W number of times the process was swapped out \n----------------- System -----------------\n%Z system page size" $*