Creating new httpx.AsyncClient takes too long

[chmielcode]

httpx version:

0.28.1

Current Behavior:

Creating new httpx.AsyncClient takes 0.2-1.0s depending on hardware

Expected Behavior:

Creating new httpx.AsyncClient takes 0.0s when rounded

Steps To Reproduce:

import httpx
httpx.AsyncClient()

Description:
I've narrowed it down to httpx.AsyncHTTPTransport instantiation and create_ssl_context function.
The slow part is:

Would it be possible to cache the "default case" and reuse it? I'm using a library that requires new AsyncClient instance for each session and the delay is really noticeable.

[chmielcode]

For now I create a global default ssl context and pass it as verify argument wherever I create a new client or transport. Maybe this will help someone else having the same problem.