FastCGI, the protocol that turns 30 this year, remains a superior choice for reverse proxy communication compared to HTTP, according to a recent discussion on Hacker News. Despite its age, FastCGI offers lower overhead and better performance in many server-to-server interactions, making it a persistent favorite among backend developers.
Unlike HTTP, which carries heavy headers and parsing overhead, FastCGI uses a binary protocol that is more efficient for internal communication between web servers and application servers. This efficiency translates to faster request handling and reduced resource consumption, particularly in high-traffic environments.
While modern HTTP/2 and HTTP/3 have improved, FastCGI's simplicity and speed keep it relevant. Developers building or maintaining reverse proxy setups should consider FastCGI as a viable alternative to HTTP for internal connections.
The protocol war may be niche, but for those who need to pick a side, FastCGI remains a compelling choice.