WordPress Performance Optimization
Speed and Core Web Vitals work that starts with measurement rather than with a caching plugin.
Your site feels slow, or a testing tool has handed you a poor score and a list of warnings you cannot act on. Performance work fails when it starts with a plugin instead of a measurement, because the real cost is usually somewhere nobody has looked. WordPress performance is measured against Google Core Web Vitals, which separate loading, interactivity and layout stability into three different problems.
Sometimes, and often not. Caching helps when the work is in generating the page. It does nothing if the problem is a slow server response, an oversized image, or a plugin loading its assets on every page of the site.
Server response time, because nothing on the front end can compensate for a slow start. Then what is blocking rendering, then what is being loaded that this particular page does not need.
Yes. LCP, INP and CLS have different causes and different fixes, so they are worth diagnosing separately rather than chasing a single overall score.
Send the address and I will tell you where the time is actually going.
