edit the source code and change the # of outgoing connections. i do 500 on a dedicated gigabit line. this bursts up to 60-90MB/s for a second or two when a new block hits the network.
i tested it on my home connection once & after a new block, it'd saturate the upstream for a good 30s or so. i guess that'd be a good way to slow down propagation, having 500+ connections and then limit upstream to 512Kbps or so.
That's probably a pretty bad idea, considering you're then eating up connection slots when you don't really need to, since you're perfectly able to be reached by other users. Editing your own outgoing connections beyond the standard 8, means there's less room for those who cannot forward port 8333 when behind a NAT.
not really, since I have 1000 max connections. it doesn't use epoll, so it crashes once you hit 1024 or so.
i've never gone above 800, w/ 500 outgoing
if i didn't set it for 500 outgoing connections, i'd max out at around 300. since i have sufficient bandwidth to handle 800 connections, it's then better to open 500 outgoing ones