Print JSONL filename when profiling finishes

Author: lkollar

Lib/profiling/sampling/jsonl_collector.py

@@ -128,6 +128,7 @@ def process_frames(self, frames, _thread_id, weight=1):
                 self._frame_cumulative[frame_id] += weight
 
     def export(self, filename):
+        print(f"JSONL profile written to {filename}")
         with open(filename, "w", encoding="utf-8") as output:
             self._write_message(output, self._build_meta_record())
             self._write_chunked_records(