FastCGI
FastCGI is a protocol for interfacing interactive programs with a web server, designed to improve upon the older Common Gateway Interface (CGI) by allowing persistent processes to handle multiple requests. It enables web servers to communicate with external applications efficiently, reducing the overhead of spawning new processes for each request. This makes it suitable for high-performance web applications that require dynamic content generation.
Developers should use FastCGI when building web applications that need to handle high traffic volumes efficiently, as it reduces server load by reusing processes across requests. It is particularly useful for scripting languages like PHP, Python, or Perl in production environments where performance and scalability are critical. FastCGI is commonly implemented in web servers like Nginx or Apache to serve dynamic content from frameworks such as Django or Flask.