how to test for scalability and performance for a snmp library

I am trying to figure out how can I test one of many SNMP libraries in node.js language for performance and scalability?

I specifically need to test to see how quickly the snmp libraries can perform with a large set of SNMP Get calls on a large set of devices (agents in 10K+ range). I need 10K+ dummy snmp agents, not sure if there is a way to create so many snmp agent daemons on one linux box?

I am trying to develop a device snmp poller (in node.js) using which I can basically poll 10K+ devices for various properties every 5-10 minutes (basically what is described here)

Currently, I have seen following snmp libraries in node.js: snmp-native, net-snmp and snmpjs. snmpjs seems to be the most actively maintained, but in order to pick the right one, I need to run some performance/scalability tests against these libraries.