nrfutil dfu very slow compared to nrf connect dfu

[bds]

Using the same connectivity firmware, a dfu update using nrfutil takes about four times as long as the same update using nrf connect. I have to setup dfu updating in a production setup and need a command line driven dfu process. Any options to speed up nrfutil, or alternatives to nrfutil?

[Hung Bui]

Hi bds, sorry for the late response. Our developer who made the nrfutil DFU is away the whole March.

But what I can see is from the trace is that the nRFutil only send 1 packet per connection event. When the nRFConnect can send multiple (usually 4) that's why you found that it's much faster with the nRFConnect.

We will try to fix it but not until the developer comes back. Could you leave a reply here in April so we can check with him, just in case I forgot.