EMA C++ Performace Tools Guide : 10 Performance Best Practices : 10.2 Enterprise Message API Best Practices : 10.2.4 Nagle’s Algorithm
 
10.2.4 Nagle’s Algorithm
For TCP socket connection types, you can set the underlying transport to use Nagle’s Algorithm to combine small content fragments into larger network frames. While this algorithm reduces transport overhead (optimizing bandwidth usage), it also increases latency, especially when sending small messages at lower data rates.
To minimize latency, the Performance Tools use TcpNodelay configuration parameter, which disables Nagle’s Algorithm.