This project provides a minimal LD_PRELOAD-based shared object (nodelay.so) that forces TCP sockets to disable Nagle’s algorithm (TCP_NODELAY), even if the application doesn’t set it explicitly.

Make sure you have gcc installed, then run:

make

This will produce nodelay.so.

Preload the shared object when running a TCP-based program:

LD_PRELOAD=./nodelay.so ./my_tcp_benchmark

This forces all socket() and setsockopt() calls to set TCP_NODELAY on SOCK_STREAM sockets.

LD_PRELOAD=./nodelay.so curl http://localhost:8080

make clean

• Works only for TCP sockets (SOCK_STREAM)
• Has no effect on Unix domain sockets or UDP
• Designed for Linux

• nodelay.c: Source code for the preload library
• Makefile: Build script

Apache-2.0