I have just installed mc.sendfile.tcl (v1.4.1 by Carl M. Gregory) on my eggdrop (v1.6.6) on a computer which are on a 100Mbit connection. With this script people can write !get-a-file in the channel, and the bot will send a file which are related to that command. This is working fine. The bot sends the file without a problem.
But the problem is: the transfer rate is so low. It hits max speed around 35kb/s. I can conncet another client to IRC, ask the bot to send me a file, and I'll get 2 transfers from the bot with 35kb/s. So it seems that the bot's is limiting the speed to 35kb/s per user.
How can I make the bot sending the file without a limit?
You may be right, although I am sure I did see a section related to DCC speed. I remember reading some Docs about a setting where setting "0" would use max speed, but can result in broken files, and it suggested setting it to "1024" or something.