A high-performance WebAssembly virtual machine designed for non-browser applications, leveraging LLVM for near-native speed.
WAVM is a WebAssembly virtual machine specifically designed for non-browser applications, enabling high-performance execution of WebAssembly code in standalone environments. It provides a secure sandboxed environment while achieving close to native performance through LLVM-based compilation and advanced memory safety techniques. The project prioritizes performance and safety for executing WebAssembly outside of web browsers.
Developers and engineers building standalone applications, server-side runtimes, or embedded systems that require secure, high-performance execution of WebAssembly modules outside of browser contexts. This includes those working on cloud computing platforms, game engines, plugin systems, or tools needing isolated code execution.
Developers choose WAVM for its combination of near-native performance via LLVM compilation and strong security isolation through virtual memory and sandboxing. Its support for WebAssembly 1.0 plus many extensions (like WASI, SIMD, and threads) and cross-platform portability across major OSes and architectures make it a robust choice for production non-browser WebAssembly execution.
WebAssembly Virtual Machine
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Uses LLVM to compile WebAssembly to optimized machine code tuned for the host CPU, often matching or exceeding native performance, as highlighted in the README's performance claims.
Leverages virtual memory and signal handlers to execute bounds-checked memory accesses at the cost of native unchecked accesses, enhancing security without major performance penalties.
Fully supports WebAssembly 1.0 plus many extensions like WASI, SIMD, threads, and exception handling, making it versatile for future standards.
Written in portable C/C++ and tested on x86-64 and AArch64 across Windows, macOS, and Linux, ensuring broad compatibility for standalone applications.
Explicitly admits vulnerability to side-channel attacks like Spectre, with mitigations being impractical for all cases, requiring extra isolation for sensitive data.
Relies on LLVM, which adds significant setup complexity and binary size, as indicated in the building instructions and dependency management.
Requires a 64-bit virtual address space, restricting use on 32-bit systems or embedded environments with legacy hardware.
LLVM-based compilation can introduce slower startup times compared to interpreters, which may be a drawback for short-lived or dynamic module loading.