span join: actually expose error messages and fix string partitions docs Change-Id: Ieb1eba0b226ab739cb7d5961846775fe0b3bf871
Perfetto is a production-grade open-source stack for performance instrumentation and trace analysis. It offers services and libraries and for recording system-level and app-level traces, native + java heap profiling, a library for analyzing traces using SQL and a web-based UI to visualize and explore multi-GB traces.
See https://perfetto.dev/docs or the /docs/ directory for documentation.