A question like this is better for answers.ros.org, but I'll give you a quick answer here. - The RTI Connext DDS implementation definitely has the ability to use shared memory for DDS clients running on the same computing node, and as I recall will do so automatically. However, it will still marshal data because it needs to do so for many of the features of Connext DDS, such as logging and introspection. - eProsima's FastRTPS apparently does not use shared memory yet but [it is on their roadmap](https://github.com/eProsima/Fast-RTPS/issues/312). - OpenSplice DDS does use shared memory internally. I don't know if this implementation marshals data for shared memory. --- [Visit Topic](https://discourse.ros.org/t/is-there-any-dds-implementation-using-shared-memory-inside-system/7609/2) 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: