What do you think about generating traffic using imacros ?

Hi all,
Are you familiar with imacros or maybe you use imacros a lot for anything ?

A while back I'm made some experiment to generate traffic using imacros with random proxy, random useragent and random referrer. The script working good for small number of traffic but its lags if i use large traffic. I was wondering if there's some kind of solution to make imacros more faster with large traffic.

Any suggestion would be appreciated.

Here's what i did to generate traffic with imacros just in case anyone interested :

1. download firefox addons RefControl, this is for adding custom referrer for your traffic (there's instruction on the addons)
2. create 3 column (proxy, port, useragents) csv files for proxy and user agent list
3. create javascript imacros (.js file)

here is the script : http://bit.ly/2CQT80t