[wp-hackers] Useful caching

[Mike Purvis]

The most logical thing to put in core would be *if it's writeable,
cache the feed directly to /feed/index.xml*, so it can be served up
without invoking PHP at all.

I watched Typo abandon this approach on a wider scale after investing
fairly heavily in a lot of JavaScript to make the pages not look quite
so static. Caching actual HTML pages this way is something each user
has to decide for themselves... but doing with the main feed makes a
lot of sense.

Mike

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