Month 2025-10 performance summary for ZettaScaleLabs repos focused on stabilizing memory management, enhancing observability, and tightening dependency management across two repositories. Delivered changes aim to improve reliability under load, accelerate debugging, and ensure reproducible builds through pinned dependencies and updated documentation.

September 2025 Highlights: Focused on performance, reliability, and security across the Zenoh ecosystem, with cross-repo delivery and release management. Major work included a bug fix to run MatchingListeners asynchronously in zenoh-plugin-ros2dds to avoid blocking; a Zenoh 1.5.1 upgrade with QoS enhancements and Windows fixes; ACL hardening for TRANSIENT_LOCAL topics; an increased default query timeout to support large deployments; and cross-distribution packaging upgrades via bloom for rmw_zenoh across ROS distributions. The result is improved runtime throughput, greater deployment resilience, and streamlined maintenance across the ROS ecosystem.

August 2025 monthly summary: Delivered key documentation enhancements across two Zenoh repositories, focusing on secure deployment and correct shared memory configuration. Business value includes improved security verification for Debian-based Zenoh installations, reduced onboarding and support time, and minimized misconfigurations in SHM setups across routers and sessions.

July 2025 performance-focused deliverables across two repositories (ZettaScaleLabs/rmw_zenoh and ros/rosdistro). Key outcomes include improved build configurability and ROS Humble compatibility, enabling faster iteration, reduced runtime surface area, and smoother deployment in production environments. The work aligns with broader goals of reliability, maintainability, and developer productivity by strengthening middleware integration and release readiness.

June 2025 monthly summary focusing on business value and technical achievements across eclipse-zenoh plugins. Key features delivered include stabilization and compatibility improvements for the DDS bridge, and Zenoh dependency upgrades across plugins, enabling alignment with Zenoh core changes. Major bugs fixed include compatibility fixes for the updated Zenoh library in the MQTT plugin to ensure runtime stability. Overall impact includes reduced integration risk, smoother upgrade paths for Zenoh core/API changes, and improved cross-plugin interoperability. Technologies demonstrated include dependency management, API adaptation, configuration parsing, and cross-repo coordination, driving faster feature delivery and safer upgrades for downstream deployments.

May 2025 monthly performance summary for ZettaScaleLabs. Focused on documentation quality, library upgrades, and dependency maintenance across rmw_zenoh and zenoh to enhance developer experience, networking flexibility, and build stability. Key outcomes include clearer ROS 2 integration docs, a major Zenoh 1.4.0 upgrade with transport/QoS options, and updated sequence-number API docs with stable dependency updates.

Month: 2025-04. This period centered on strengthening the reliability of the rmw_zenoh integration by delivering a core feature upgrade and aligning with upstream Zenoh changes. Delivered a Zenoh Reliability Enhancement with HeartbeatSporadic, upgrading Zenoh to v1.3.2 and introducing a HeartbeatSporadic mechanism to enable sample miss detection and recovery for reliable and transient local topics. Configuration updates were aligned with upstream Zenoh changes, ensuring compatibility and a smoother path for future upgrades. Overall impact includes improved end-to-end topic reliability and reduced risk of data loss in intermittent network conditions, laying groundwork for broader deployment.

March 2025 monthly summary: Across three repositories, delivered business value through CI reliability, reproducible builds, up-to-date dependencies, and clearer internal documentation. Key outcomes include standardizing the CI environment for zenoh-test-ros2dds, updating Cyclors to 0.2.6, enforcing deterministic dependency pinning for reproducible builds in zenoh, and enhancing internal-crate/zenoh-ext documentation with warnings, badges, and lint-aligned formatting. A Rust 1.75 compatibility fix was completed for zenoh-plugin-dds to align with the newer compiler. These activities reduce build drift, improve maintainability, and strengthen CI/CD observability across the codebase.

February 2025 monthly summary for ZettaScaleLabs/rmw_zenoh: Delivered a significant Zenoh stack upgrade focused on network reliability and performance. Implemented granular autoconnect strategies, enhanced discovery with an interests timeout, updated gossip target, and enabled lazy memory allocation for priority queues. Vendored zenoh-c and zenoh-cpp to specific commits to incorporate upstream bug fixes and performance improvements, backed by commits: - d322d6f4d86339a4dc041728ad98e11a6dd855e0: Bump Zenoh to commit id e4ea6f0 (1.2.0 + few commits) (#446) - 1601a69622cd913d0f34e64f1840f3b159ca5e75: Bump Zenoh to commit id 3bbf6af (1.2.1 + few commits) (#456) - baa4e875eca13dc16cebc61842cd6cf2600158fb: Bump zenoh-c to 261493 and zenoh-cpp to 5dfb68c (#463)

Concise monthly summary for 2025-01 covering delivery, fixes, and impact across the Zenoh core, MQTT plugin, and RMW Zenoh, with emphasis on business value and maintainability.

December 2024 monthly summary focusing on key accomplishments, with an emphasis on delivering business value through reliable features, improved performance, and enhanced usability across three repositories: eclipse-zenoh/zenoh-plugin-ros2dds, ZettaScaleLabs/zenoh, and ZettaScaleLabs/rmw_zenoh. Key work included: (1) ROS 2 DDS Type Hash Support for zenoh-plugin-ros2dds to ensure correct connection establishment and data type handling for ROS distributions iron and later by forwarding type hash information in USER_DATA via QoS; (2) DDS Routing Improvements using Zenoh's new Querier and matching_listener to streamline routing of DDS requests, improve activation/deactivation logic for DDS readers/writers, and align routing with Zenoh queries based on matching status; (3) Autoconnect Client Default Config enhancement with a clarified description to improve usability across router, peer, and client modes; and (4) Startup overhead reduction in the rmw_zenoh_cpp router by setting peers_failover_brokering to false, reducing unnecessary message traffic during direct peer connections. These changes collectively improve compatibility with modern ROS 2 releases, reduce startup and runtime overhead, simplify configuration, and strengthen end-to-end system reliability.

In 2024-11, focused on reliability and clarity for the zenoh-plugin-ros2dds integration by documenting configuration, hardening discovery/peer handling, and tightening NodeInfo updates. Delivered features and fixes that improve visibility, security, and performance in ROS2 DDS environments.