The Nagle algorithm makes Telnet more efficient. It reduces the number of IP packets sent over the network by consolidating messages that are sent within a small time interval into a single IP packet. When the Nagle algorithm is enabled, the operating system waits some interval before actually committing the data from a send command, in the hopes that the application will call send again with more data that can be consolidated with the first. For details see https://www.ietf.org/rfc/rfc896.txt
The value of the UseNagleAlgorithm setting may be 1 or 0:
When 1 (true), use the Nagle algorithm.
When 0 (false), do not use it.
0 or 1. The default is 0.
On the page System Administration > Configuration > Additional Settings > Compatibility, in the UseNagleAlgorithm row, select Edit. Choose true (selected) or false (cleared).