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.
## 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
## 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.
_Patience is the companion of wisdom._
<p align="right"> --- Augustinus </p>