Jack Franklin refactored the CPU profiling export pipeline for the google/perfetto repository, focusing on consolidating profiler events in the JSON export. He removed legacy stackCpuSampling events and established V8-based CPU profiler events as the authoritative data source, streamlining the export process and improving data consistency. This change reduced the maintenance burden by eliminating related unit tests and simplified trace processing for downstream analysis. Working primarily in C++ and leveraging expertise in CPU profiling and JSON export, Jack delivered a targeted feature that enhanced reliability and maintainability. The work demonstrated thoughtful depth in addressing both technical debt and data integrity.