libunwind-eh_elf/tests/perf-startup

#!/bin/sh
platform=$1
LIBUNWIND=../src/.libs/libunwind.so
LIBUNWIND_PLAT=../src/.libs/libunwind-$platform.so
warmup=$(./forker 2000 /bin/true | cut -f1 -d' ')

nsec1=$(./forker 2000 /bin/true | cut -f1 -d' ')
printf "\"/bin/true\"\t\t\t\t\t\t: $nsec1 nsec/execution\n"

nsec2=$(LD_PRELOAD=$LIBUNWIND ./forker 2000 /bin/true | cut -f1 -d' ')
printf "\"LD_PRELOAD=$LIBUNWIND /bin/true\"\t: $nsec2 nsec/execution\n"

nsec3=$(LD_PRELOAD=$LIBUNWIND_PLAT ./forker 2000 /bin/true | cut -f1 -d' ')
printf "\"LD_PRELOAD=$LIBUNWIND_PLAT /bin/true\"\t: $nsec3 nsec/execution\n"

echo

printf "Overhead of preloading $LIBUNWIND\t: $(($nsec2 - $nsec1)) nsec\n"
printf "Overhead of preloading $LIBUNWIND_PLAT\t: $(($nsec3 - $nsec1)) nsec\n"