A normal application can scale to 10k concurrent requests as fast as they come in (i.e. a fraction of a second). Even at 16kB/request, that's a little over 160

A normal application can scale to 10k concurrent requests as fast as they come in (i.e. a fraction of a second). Even at 16kB/request, that's a little over 160 MB of memory. That's the point: a socket and a couple objects per request scales way better than 1 process/request which scales way better than 1 VM per request, regardless of how hot you keep the VM. Serving 10k concurrent connections/requests was an interesting problem in 1999. People were doing 10M on one server 10 years ago[0]. Lambda is traveling back in time 30 years. [0] https://migratorydata.com/blog/migratorydata-solved-the-c10m-problem/ https://migratorydata.com/blog/migratorydata-solved-the-c10m...