Yesterday, I got lasered in the arm twice. A good three minutes later I lose all controle off my arm and have an assistant debride my arm. On a surgical table with sterilizine, this took 2 minutes and 30 seconds.
All wounds can be fixed quite easily, but the infection wound type has always been an absolute nightmare. This was the only time I recorded it, but this has happened so many times and it feels like the average lies around 4~ minutes for this surgery to complete.
It still depends on how badly infected your burn wound is, but it shouldn't take longer than 30 seconds now.