Hi, As we know rosbag can be quite big. In many real world scenarios a considerable space is used by strings, since ros message use extensively names as identifiers (example: name of joint or frame_id). LZ4 compression does a very good job in term of speed vs size reduction. I wonder if raw rosbag might use hashed string to reduce the serialize size? It can be done quite easily, I think, using a library like this one https://github.com/foonathan/string_id What do you think? If the community consider this upgrade useful, I can try implementing it myself :smiley: and do a pull request. Davide --- [Visit Topic](https://discourse.ros.org/t/smaller-rosbags-with-hashed-strings/942/1) or reply to this email to respond. If you do not want to receive messages from ros-users please use the unsubscribe link below. If you use the one above, you will stop all of ros-users from receiving updates. ______________________________________________________________________________ ros-users mailing list ros-users@lists.ros.org http://lists.ros.org/mailman/listinfo/ros-users Unsubscribe: