Is there any actual advantage to upgrading from 2.2.1?

[kotekzot]

Since I installed 3.0 I've been plagued by constant disk overloads (while downloading) and low upload speeds. Downgrading to 2.2.1 solved both problems right away.

I did a small test just now, making 2 copies of my uTorrent folder and upgrading one of them to 3.0 from 2.2.1. uTorrent 3.0 took about 30 seconds to get to 1.6MBps upload speed and stayed there. uTorrent 2.2.1 got to 2.5MBps in about 15 seconds and kept the speed. Since the settings were the same, I don't see how this could be attributed to user error. What gives?

Edit: my torrent drive is running in ultra DMA mode 5, no PIO.

[ktetch]

uTorrent 3.0 took about 30 seconds to get to 1.6MBps upload speed and stayed there. uTorrent 2.2.1 got to 2.5MBps in about 15 seconds and kept the speed. Since the settings were the same, I don't see how this could be attributed to user error. What gives?

Welcome to the issue which has plagued bittorrent researches (such as myself) for a decade. The clients are connected to different peers, and so they're not directly comparable. The only way they could be is if you were connected to the exact same peers, at the exact same completion level. If you don't have that, then you don't have comparable swarms.

Put another way, you could have all the same peers except one on both clients. The different peer is that the 2.1 has a swedish peer, the 3.0has an australian peer. Sweden has fast (often 100Mbit+ upload) connections, while Australia has connections with a fairly low monthly allowance. That alone would make a HUGE difference in speeds.

You just can't compare like that, it doesn't work.

[kotekzot]

Maybe, but if I get stable upload of 2.6MBps with uTorrent 2.2.1 for days, and stable upload of 1.5MBps with uTorrent 3.0 for days, then one would assume a different peer here or there won't make much of a difference.