What is LiteSpeed Web Server?

LiteSpeed is one of the faster web servers in the industry. The biggest difference between LiteSpeed Web Server and Apache (the web server we was usin before) is in the design of their architecture. Apache is process-based — it creates a new process or thread for every connection. Creating these processes requires a lot of overhead.

LiteSpeed Web Server is event-driven, which means it serves all connections on a few processes, saving resources. This efficient method of serving connections means you can serve many more connections, at a much higher rate. LiteSpeed is asynchronous. Asynchronous I/O is a form of input/output processing that permits other processing to begin before a transmission has finished, cutting latency.

Faster PHP: PHP processes are started by using a fork() system call, instead of starting a brand new PHP process. This is much faster and allows users to effectively utilize opcode caching, while preserving the separation necessary for shared hosting.

High Performance Static Content: LiteSpeed Web Server's event-driven architecture allows it to handle static requests much faster than Apache — up to 10x faster at high traffic volumes.

High Performance Dynamic Content: LiteSpeed's exclusive server API, LSAPI, handles web applications much more efficiently than other APIs, resulting in PHP web applications that run up to 50% faster than with Apache.

SSL Acceleration: LiteSpeed Web Server uses SSL acceleration to deliver HTTPS pages up to three times faster than Apache.

HTTP/3 + QUIC  support: HTTP/3 is the newest version of the Hypertext Transfer Protocol, formerly referred to as "HTTP over QUIC," and is the successor to HTTP/2. QUIC was originally a Google effort to improve HTTP/2 by transporting it encrypted over UDP. In 2016, the IETF began working to standardize the protocol. Part of that process involved splitting QUIC into the transport protocol (QUIC) and the application protocol (HTTP/3).