Gazebo boosts startup speed 2x with rendering optimizations for 3,000-shape scenes

The Gazebo PMC meeting on July 13, 2026, showcased a key performance enhancement for the robotics simulation platform. Developers identified and removed redundant calls that pre-rendered visual children twice per frame, which were superseded by a base class call. This optimization dramatically improved startup speed when loading large scenes, confirmed in tests with 3,000 shapes. The fixes have been merged across four target branches: Rotary #1309, Jetty #1311, Ionic #1312, and Harmonic #1313. Additional optimizations like pausing rendering when scenes are unchanged were considered but deemed too risky.

Beyond performance, the meeting outlined community and infrastructure updates. ROSCon 2026 planning is underway with a PMC meeting (Monday) and public hackathon (Friday) to boost open source participation. Sponsorship for hackathon lunches and a contributors dinner are being explored. The self-nomination window for project leadership roles is closing soon. Infrastructure progress includes resolution of all buildfarm priority issues except a new CMake 4.4 warning (Policy CMP0219) in GzStringAppend.cmake, with a temporary fix applied. The buildfarmer dashboard is nearly complete and open for review. The next PMC meeting is scheduled for July 20, 2026.