My understanding has always been that nodejs was ideal for high io workloads with a light cpu load.

Having it sleep for 100ms per request is a little strange for nodejs though because it is basically simulating cpu load, even though a node server typically hands off work to an optimized library that might be disk or network io bound instead of cpu bound. 100ms is a lot of cpu work per request, no? That is specifically the sort of task node is not recommended for, since it focuses on async.

Maybe I’m wrong, I need to work on larger projects to see what loads are more typical. At my last job, the entire focus was to use node to redirect work to c++ code, databases, etc, basically just request routing.

Still, this looks rough for node. 2x to 4x difference between it and the fastest is still a significant cost for such a nice backend to work with