Import to csv is very slow

[evsluzh]

[jonyrock]

It would be nice to add at least progress field showing where are we

[rozetko]

We can do batch writes, I guess. Found few examples:
https://github.com/vicanso/influxdb-nodejs/blob/master/examples/batch-by-interval.js
https://github.com/vicanso/influxdb-nodejs/blob/master/examples/batch-by-count.js