‘tcmalloc’ is a library Google created as part of the google-perftools suite for speeding up memory handling in a threaded program. It’s very simple to use and does work fine with Suricata. Don’t expect magic from it, but it should give you a few percent more speed.

On Ubuntu, install the libtcmalloc-minimal0 package:

apt-get install libtcmalloc-minimal0

Then run Suricata as follows (on a single line):

LD_PRELOAD=”/usr/lib/libtcmalloc_minimal.so.0″ ./src/suricata -c suricata.yaml -i eth0

That is all there is to it. 🙂