to my mind, it's less about the language and much more about the server architecture. Squid caching proxies, memcache, which db to use (mySQL, noSQL etc), etc.

to my mind, it's less about the language and much more about the server architecture. Squid caching proxies, memcache, which db to use (mySQL, noSQL etc), etc. The actual dev framework is just a matter of taste and experience. It's the server architecture that's going to be responsible for performance/uptime issues.