python
Recommend `--config-cache` for `configure`
Describe the enhancement or feature you would like
Using --config-cache with configure makes it much quicker: 3s cached vs 39s without on my machine.
Some example wasm commands include it, but shall we include it by default in the other relevant commands on that page, and the front page?
Describe alternatives you have considered
Status quo, builds are slower. Or only include it in the getting-started/setup-building page if there's some reason not to put in on the front page.
Additional context
Not everyone knows about this option: https://github.com/python/cpython/pull/133027#issuecomment-2848775080
It's faster but also adds another thing that can go wrong.
If config.cache is out of date (for example, you switch compilers or use different settings), it needs to be removed.
I'm using a configure cache for many years and I never got any issue because of this cache. If the C compiler changes or if C flags (especially the optimization level) change, configure complains: I just delete the cache in this case. The error message is quite explicit and helpful.
