On Saturday, 28 November 2015 at 10:46:11 UTC, tcak wrote:
The only case that would make sense is if the server limits the upload speed of each TCP socket. Unless you are in this position, I do not expect to see any difference by opening multiple sockets and requesting different parts of same file.
I used to live in China for some time, and access to international servers was dog-slow. It also was very unpredictable. Sometimes a connection would be ok (80 kb/s) then suddenly drop to < 3 kb/s. Other times it wouldn't start at all.
Having seen that behavior I build a multi-part downloader that opened around 40 connections and restarted a connection if it went below 1Kb/10sec.
Worked very well. With it I got up to 1Mb/sec. Which is pretty fast considering I used to stare at 9Kb/s download dialogs.
I really hated all those programs that needed to download something and expected the connection to be flawless and the throughput to be infinite.
