node servers should deliver at least 75% of throughput as firefox servers

[trevj]

From https://github.com/uProxy/uproxy-docker/pull/96, it's clear that WebRTC in Node.js is slow: on my system, Zork on Node.js has 1/10 the throughput of Zork on Chrome. Excerpt from https://github.com/uProxy/uproxy-docker/pull/96:

no obfuscation

0ms latency

chrome,14611 firefox,5781 node,1523

150ms latency

chrome,604 firefox,612 node,225

caesar

0ms latency

chrome,1289 firefox,1772 node,872

150ms latency

chrome,535 firefox,532 node,192

Proposing that Node should deliver 75% of Firefox's obfuscated throughput.