Writing
Notes on WordPress, performance and the problems that turn up on real sites.
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I kept WordPress and removed the server
Trimming assets by 22% did nothing for a 1.3 second first byte. Taking the origin out of the path got it to 0.3 seconds.
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update_post_meta does not fire save_post
A lookup table that rebuilt on save_post went stale the moment a script changed the data. Why, and the two ways to handle it.
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The cache purge that said it worked
wp litespeed-purge all printed Success, and 19,189 stale pages kept being served. Where the cache really lived, and how to check a purge.