The GreatVoyage-v4.4.2(Augustinus) has three essential updates: The new execution model of opcode boosts the TVM performance; individualized LevelDB parameters improve the database performance; and the newly added log filter APIs make the JSON-RPC API more comprehensive.

# TVM

## 1. TVM Opcode Execution Model Optimization

The opcode execution model of the interpreter in TVM is optimized in GreatVoyage-v4.4.2(Augustinus). The performance of TVM is proven to have a great boost through testing.

TIP: https://github.com/tronprotocol/tips/blob/master/tip-344.md Source Code：https://github.com/tronprotocol/java-tron/pull/4157

# API

## 1. Newly Adding ETH compatible log filter for JSON-RPC APIs.

Log filter related APIs are available from GreatVoyage-v4.4.2 for compatibility with Ethereum JSON-RPC API.

TIP: https://github.com/tronprotocol/tips/issues/343 Source Code：https://github.com/tronprotocol/java-tron/pull/4153

# Other Changes

## 1. LevelDB Databases Performance Optimization

Parameters of each LevelDB database have been individualized by the I/O frequencies from GreatVoyage-v4.4.2(Augustinus). This will significantly boost the database performance.

Source Code：https://github.com/tronprotocol/java-tron/pull/4154

_Patience is the companion of wisdom._

<p align="right"> --- Augustinus </p>