WebAssembly是一种可移植、体积小、加载快且接近原生性能的二进制指令格式，最初为浏览器设计，现已扩展到服务端、边缘计算与嵌入式等多元场景，核心是跨平台字节码与沙箱化执行，能力包括字节码标准、运行时引擎与标准化系统接口。它解决的是原生代码难以跨平台复用与插件执行不安全的问题，并不解决运行时性能仍弱于原生的情况。
WebAssembly的核心是可移植与沙箱，它可以帮助企业实现以下目标：
让同一份二进制跨平台运行。编译产物不再绑定具体指令集，同一文件可在不同架构的机器上直接加载。沙箱边界由运行时强制执行，模块只能通过显式声明的接口访问外部，这是与原生插件机制的根本差别。
让组件在受限环境中安全执行。运行时提供隔离的内存与受控接口，第三方代码无法随意访问宿主资源。
让启动速度进入毫秒级量级。体积小且无需即时编译的场景，冷启动时间显著低于容器与虚拟机。系统接口让模块以标准方式访问文件、网络与随机数，避免每个运行时各自定义一套，限制了模块的可移植范围。
让服务端与边缘使用同一套运行时。同一门语言编译出的模块既能跑在浏览器，也能跑在边缘节点上。
总之，WebAssembly可以帮助企业实现软件分发从平台绑定到一次编译到处运行的转变，降低多端适配与跨语言集成的成本，让不可信代码在受控环境中安全执行，并推动云原生应用向轻量、弹性与边缘化方向演进。
翻译
WebAssembly is a portable, compact, fast-loading binary instruction format with near-native performance, originally designed for browsers and now extended to server, edge and embedded scenarios. Its core is cross-platform bytecode and sandboxed execution, with capabilities covering the bytecode standard, runtime engines and standardized system interfaces. It solves the problems of native code being hard to reuse across platforms and of plugin execution being unsafe, but it does not solve the reality that runtime performance still lags native code.
At the heart of WebAssembly is portability and sandboxing, which can help companies achieve the following:
Run the same binary across platforms. Compiled artifacts no longer bind to a specific instruction set, and the same file loads directly on machines of different architectures.
Execute components safely in restricted environments. The runtime provides isolated memory and controlled interfaces, so third-party code cannot freely reach host resources.
Bring startup time into the millisecond range. Small size and no ahead-of-time compilation in applicable scenarios yield cold starts significantly faster than containers and virtual machines.
Use one runtime on both server and edge. Modules compiled from the same language run in the browser and on edge nodes alike.
In short, WebAssembly can help enterprises shift software distribution from platform-bound to compile-once-run-anywhere, reduce the cost of multi-platform adaptation and cross-language integration, let untrusted code execute safely in controlled environments, and push cloud-native applications toward lighter, more elastic and edge-oriented architectures.
