Performance Test vs vim-node-rpc

[roxma]

vim-node-rpc author posted an article that claims vim-node-rpc is faster than this plugin

But I can't agree with that if I don't understand why it's faster.

I build a ubuntu 17.10 based docker image for easier reproducing the test. The result doesn't shows that vim-node-rpc is faster. On the contrary, it gets slower when the data gets bigger.

https://hub.docker.com/r/roxma/rpc-test/

// cc @chemzqm