The document compares the performance of LiteSpeed Web Server (LSWS), Apache, and NGINX when processing PHP scripts. Three benchmarks show LSWS significantly outperforming the others, especially with keep-alive connections enabled. This is due to optimizations in the LiteSpeed Server API (LSAPI) and its tight integration with LSWS. LSAPI allows different PHP processing modes for varying performance needs and enables fast and secure suEXEC configurations with opcode caching.