[Python-Dev] Python startup time (original) (raw)

INADA Naoki songofacandy at gmail.com
Wed May 2 23:57:28 EDT 2018

For Python 3.8, my ideas for faster startup time are:

Add lazy compiling API or flag in re module. The pattern is compiled when first used.
Add IntEnum and IntFlag alternative in C, like PyStructSequence for namedtuple. It will make importing socket and ssl module much faster. (Both module has huge enum/flag).
Add special casing for UTF-8 and ASCII in TextIOWrapper. When application uses only UTF-8 or ASCII, we can skip importing codecs and encodings package entirely.
Add faster and simpler http.parser (maybe, based on h11 1) and avoid using email module in http module.

I don't have significant estimate how they can make import requests faster, but I believe most of these ideas are worth enough.

Regards,