tp: rework handling of implicit and parent columns Mutability of Table leads to very subtle bugs which are hard to track down. Instead, have wrappers for Table and Column which are themselves immutable and handle implicit and parent columns there. Change-Id: I8363974af63acece9734e422e8364d1b3ce23f82
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.