Be careful with it, it will segfault randomly and there hasn't been a fix. After hitting my own posts on the Google groups while sleepily debugging the segfault at wee hours of the morning and getting falsely excited about the possibility of a fix, I gave up and wrote a replacement: https://github.com/chronomq/chronomq Have been running it for years without it falling over, submillisecond operations on average, and has processed billions of messages without failing.