WebAssembly (Wasm) had a strong start this year, with new runtimes emerging for non-browser applications that offer more direct access to underlying systems. This could usher in a new era of performance optimization. With the maturation of the WASI (WebAssembly System Interface) standard, I’m curious about how application development processes might evolve. What new use cases do you think we’ll see for Wasm this year? For example, what developments might emerge in edge computing or IoT?
What does WebAssembly promise in 2024?
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Several key trends are driving Wasm's rapid rise. First, the evolution of the WASI standard over the past few years has been remarkable—especially with the recent release of WASI 0.2.0. Now, Wasm is no longer confined to the browser; it can run directly on the Linux kernel, Windows Subsystem, or even bare-metal hardware. Google’s recent contributions to WASI’s Linux implementation—like memory-safe syscall interfaces—are game-changers. Wasm is no longer just "fast code for the web"; it’s becoming a platform for building entirely new application runtimes.
What excites me most is WASI’s potential as a "polyglot runtime." Rust, Go, C++, and even Python bytecode can all be packaged into a single binary without sacrificing native performance. For example, Shopify saw a 30% performance boost last year when experimenting with Wasm-based Mira (a Ruby runtime). I think this trend will gain momentum in 2024, positioning WASI not just as "a runtime for Linux" but as "a runtime that works everywhere."
I think with the maturation of the WASI standard in 2024, we're going to see a serious "systems era" for Wasm applications. I tried implementing file system access in a Node.js plugin using WASI Preview 2, and it blew me away how easy it was to port that access to a SaaS environment—no more Docker needed, just a Wasm module and a defined "fs" interface. This has serious potential to improve the deployment and security of cloud-native applications.
On the other hand, performance differences between runtimes are still critical. When I compared **Wasmtime** and **WasmEdge**, I saw WasmEdge pull ahead significantly in networking operations—especially when moving Go-based applications to WebAssembly, it provided a seamless transition. If you're starting to take Wasm seriously, you can optimize your development process using **Wasm-compatible compilers** (e.g., Rust with `cargo component`) as a functional powerhouse.