Way to customize iperf command?

[iamsquash]

Feature Request

I wish there were a way to add options to the Iperf3 command that is used to measure up and down speeds.

Feature Description

For example, I would like to use iperf options like these: iperf3 -c xxx.xxx.xxx.xxx -w 416k -P 3 -R

Use Cases

I have found that this command maxes out the transfer speed across my WIFI network much better than the default settings, giving a better and more stable/accurate reading.

Testing Assistance

I would be happy to test pre-release code for this feature.