Preformance Test (on NanoPi R2s, repeat 1000 times): old command cpu_usage=$(expr 100 - $(cat /tmp/top_tmp | grep 'CPU:' | awk -F '%' '{print$4}' | awk -F ' ' '{print$2}')) ``` real 0m 14.25s user 0m 7.96s sys 0m 20.33s ``` new command cpu_usage=$(cat /tmp/top_tmp | awk '/^CPU/ { printf("%d%%", 100 - $8) }') ``` real 0m 6.91s user 0m 4.29s sys 0m 6.06s ``` Signed-off-by: Chuck <fanck0605@qq.com> [adjusted for our own tree] Signed-off-by: CN_SZTL <cnsztl@project-openwrt.eu.org>
