When a site feels slow, the host gets blamed first. Sometimes that’s fair — but before you migrate, measure where the time actually goes. A slow TTFB has three possible homes: the network, the server, and your application. Only one is the host’s fault.
Break down the connection
Test from a tool that splits the connection into DNS lookup, initial connection, TLS, then waiting (TTFB). If DNS is slow, that’s your DNS provider — move to a faster one. If the connection and TLS are fine but the wait is long, the delay is the server generating the page.
That generation time is usually your app
Uncached WordPress rebuilds every page on every request: PHP executes, the database runs queries, plugins fire on init. A single slow plugin doing an external API call on every load can add 500ms before the first byte. Enable full-page caching first — it’s the biggest TTFB win and it’s free.
Then profile what runs on init. Query Monitor shows slow database queries and which plugins own them. Heavy autoloaded options, a bloated wp_options table, or a plugin polling an API on every request are all common.
Only after caching and a plugin audit can you honestly say the host is the bottleneck. Most of the time, the same site on the same server drops from 900ms to 150ms — no migration required.