FastCGI is a protocol that allows Nginx ↗ to communicate efficiently with PHP applications. Instead of processing PHP scripts directly, Nginx forwards requests to a FastCGI Process Manager (PHP-FPM), which handles execution and returns the response.
The cached response is delivered directly to the user, bypassing the typical CGI (Common Gateway Interface) process, which spawns a new process for each request. This method can significantly boost performance, reducing TTFB (Time to First Byte) and load times by over 30%.
Enable cache
You can enable the FastCGI cache by toggling it on in the Nginx section. For subdomains, caching can be configured individually for each domain.
If you're actively editing your website, it's best to disable the FastCGI cache. Otherwise, changes won't appear in real-time, requiring you to manually purge the cache each time.
