Pending API and Streaming API Performance Improvements

We’ve shipped a major performance update to the Pending API, Streaming API and trace processing pipeline.

Key improvements:

— Moved action classification to C++ and integrated it directly into the Trace Emulator.
— Moved external message TTL tracking into the Trace Emulator, removing a separate service from the pipeline.
— Reduced Redis reads across trace processing and Streaming API.
— Made confirmed → finalized trace promotion significantly cheaper by avoiding full trace reprocessing.

With these changes, performance increased by a factor of 2.5. The system demonstrated stability during testing on a testnet at 1,500 TPS on the blockchain.

No changes are required on the part of customers.