path: root/Misc/NEWS.d/next/Library/2018-01-19-19-57-45.bpo-32596.4aVIie.rst

``concurrent.futures`` imports ``ThreadPoolExecutor`` and
``ProcessPoolExecutor`` lazily (using :pep:`562`).
It makes ``import asyncio`` about 15% faster because asyncio
uses only ``ThreadPoolExecutor`` by default.