1. Low-Level Control: Rust and C++ allow fine-grained memory management and control, crucial for efficient WebAssembly execution.
2. Optimized Compilation: Both languages offer advanced compiler optimizations, resulting in compact and fast WebAssembly code.
3. No Runtime Overhead: Rust's and C++'s abstractions map well to WebAssembly, minimizing runtime overhead compared to higher-level languages.
4. Predictable Performance: Rust's ownership model and C++'s manual memory management lead to consistent and reliable performance in the WebAssembly environment.
5. Direct Hardware Interaction: Rust and C++ enable direct interaction with hardware, crucial for certain applications like gaming.
6. Existing Libraries: C++ and Rust have extensive libraries that can be compiled to WebAssembly, leveraging existing codebases for web applications.
7. Interop Capabilities: Both languages provide solid interop with JavaScript, allowing seamless integration of WebAssembly modules into existing web projects.
8. Ecosystem Support: Rust and C++ have growing communities and tools dedicated to WebAssembly development, ensuring ongoing improvements and support.
9. Type Safety and Memory Safety: Rust's strong emphasis on preventing memory-related errors and C++'s modern features.
10. Performance-Critical Applications Rust and C++ are well-suited for performance-critical tasks like real-time graphics, simulations, etc.