| 1 | #
|
|---|
| 2 | # Simple performance test for POSIX-compliant shells
|
|---|
| 3 | #
|
|---|
| 4 | # Usage: time env -i <shell> shell-perf.sh [<num subshells>]
|
|---|
| 5 | #
|
|---|
| 6 | # Written by Mathias Lafeldt <mathias.lafeldt@gmail.com>
|
|---|
| 7 |
|
|---|
| 8 | # for linux OS
|
|---|
| 9 | #shell="$(ps -o pid,command | awk "\$1 == $$ { print \$2 }")"
|
|---|
| 10 |
|
|---|
| 11 | # for OS/2
|
|---|
| 12 | xpid=$(printf %X $$)
|
|---|
| 13 | shell="$(pstat /p:$xpid | grep ^$xpid | awk "{ print \$4 }")"
|
|---|
| 14 |
|
|---|
| 15 | forks=${1:-1000}
|
|---|
| 16 |
|
|---|
| 17 | echo -n "Forking $forks $shell subshells"
|
|---|
| 18 |
|
|---|
| 19 | for i in $(seq 1 $forks); do
|
|---|
| 20 | "$shell" -c 'echo -n .; j=1; while [ $j -le 1000 ]; do j=$(($j+1)); done'
|
|---|
| 21 | done
|
|---|
| 22 |
|
|---|
| 23 | echo ""
|
|---|
