comparing here strings and pipes

herestring.sh

#!/bin/bash

for i in {1..1000}; do
        sed 's/lo//' <<< "hello world\n"
done

output.sh

➜  ~  time ./pipes.sh &>/dev/null
./pipes.sh &> /dev/null  0.46s user 5.36s system 121% cpu 4.806 total
➜  ~  time ./herestring.sh &>/dev/null
./herestring.sh &> /dev/null  0.39s user 3.54s system 99% cpu 3.960 total
➜  ~  time ./pipes.sh &>/dev/null
./pipes.sh &> /dev/null  0.43s user 5.31s system 121% cpu 4.724 total
➜  ~  time ./herestring.sh &>/dev/null
./herestring.sh &> /dev/null  0.38s user 3.60s system 99% cpu 4.001 total

pipes.sh

#!/bin/bash

for i in {1..1000}; do
        echo "hello world" | sed 's/lo//'
done