I remember SPARC being the mainstay of webhosting. It seems weird for this question to be posed.

UltraSparc smoked Intel at web server response times because it could handle so many more threads for Apache.

They even made CPU with a uarch specifically for webservers in the mid 2000s: https://en.wikipedia.org/wiki/UltraSPARC_T1 The VHDL was later published under the GPL.