python3 -u -c 'import sys while (1): sys.stdout.write("1")'| pv>/dev/null 427KiB/s python3 -c 'import sys while (1): sys.stdout.write("1")'| p

python3 -u -c 'import sys while (1): sys.stdout.write("1")'| pv>/dev/null 427KiB/s python3 -c 'import sys while (1): sys.stdout.write("1")'| pv>/dev/null 6.08MiB/s Using python 3.9.7 on macOS Monterey.