EVM vs WASM: Blockchain Networks Weigh Execution Environment Options

The Ethereum Virtual Machine (EVM) and WebAssembly (WASM) are two execution environments that power smart contracts on blockchain networks. The EVM was created specifically for Ethereum, while WASM began as a web technology before being adapted for blockchains.

The EVM executes smart contracts deterministically, ensuring that every node reaches the same result after processing a transaction. Developers write EVM contracts in languages such as Solidity or Vyper and compile them into bytecode before deployment. The EVM's greatest strength is its mature ecosystem, with thousands of decentralized applications, developer tools, wallets, and infrastructure providers built around it.

WASM, on the other hand, is a general-purpose virtual machine that can execute code efficiently across different hardware platforms. It supports languages such as Rust, C, C++, and AssemblyScript through supported toolchains. WASM contracts are compiled to bytecode before deployment, allowing developers to work in languages already common in software engineering.

The choice between EVM and WASM often comes down to the specific goals of each blockchain network. Networks prioritizing rapid ecosystem growth tend to adopt EVM compatibility, while those seeking performance or broader programming language support may choose WASM.