When, Aion Mainnet Launch, Aion FastVM gonna be Aion Phase 1: Kilimanjaro Release. Aion FastVM is an enhanced Ethereum Virtual Machine (EVM), featuring 128-bit data word size for better performance. It uses LLVM JIT as execution engine and runs decentralized application at native speed. Due to the architecture change, the instruction set and the energy cost of each instruction has been optimized. In addition, solidity compiler has been updated so that it can generate code for the Aion FastVM.