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Site is hosted on LiquidWeb and they are claiming that WordPress is causing slow initial server response (TTFB).
The caching plugin that they recommend is WP Rocket, which doesn’t seem to address TTFB at all, and is $99, so I don’t want to buy and then have it do nothing.
Can anyone here recommend a caching plugin that might help?
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If you have no caching, then any caching plugin will help. If you know how to optimize sites, then you can use WP Fastest cache & Autoptimize. If not, you can try something like WPOptimize or Hummingbird.
TTFB is *usually* caused by a poor physical setup e.g. shared hosting, low bandwidth, busy CPU. Typically the only solution to that is to move to a better host.
LiteSpeed