I did not get as dramatic of results as you. # python3 -m venv example # source example/bin/activate (example) # pip install pyflakes Collecting pyflak

I did not get as dramatic of results as you. # python3 -m venv example # source example/bin/activate (example) # pip install pyflakes Collecting pyflakes Downloading pyflakes-1.5.0-py2.py3-none-any.whl (225kB) 100% || 225kB 892kB/s Installing collected packages: pyflakes Successfully installed pyflakes-1.5.0 (example) # time for i in {00..99}; do python -m pyflakes /dev/null; done real 0m7.167s user 0m6.407s sys 0m0.750s (example) # time for i in {00..99}; do pyflakes /dev/null; done real 0m7.661s user 0m6.894s sys 0m0.753s