Wasmer

Wasmer
Name	Wasmer
Developer	Wasmer, Inc.
Released	2018
Programming language	Rust
Platform	Cross-platform
License	MIT OR Apache-2.0

Wasmer Wasmer is a runtime for executing WebAssembly binaries on servers, desktops, and embedded devices. It enables running WebAssembly modules alongside projects involving Linux, Windows, macOS, Docker (software), and cloud platforms like Amazon Web Services, Google Cloud Platform, and Microsoft Azure. The project intersects with initiatives from standards bodies and companies such as World Wide Web Consortium, Mozilla, Google', Intel Corporation, and ARM Holdings.

Overview

Wasmer provides a standalone runtime system for WebAssembly that aims to bring portability from Mozilla Firefox, Chromium (web browser), and Node.js (software) environments to native contexts. It competes and interoperates with other runtimes and toolchains including WASI (WebAssembly System Interface), Lucet (runtime), Wasmtime, V8 (JavaScript engine), and Fastly-related projects. The project integrates with compilation toolchains like LLVM, GCC, and languages ecosystems surrounding Rust (programming language), Go (programming language), Python (programming language), Java (programming language), C# / .NET Framework, and Ruby (programming language).

History and Development

Development began amid growing industry interest led by companies and research groups such as Cloudflare, Fastly, Mozilla Corporation, Google LLC, and academic labs at MIT, Stanford University, UC Berkeley, and ETH Zurich. Founders drew on experience from projects like WebAssembly Micro Runtime and influences from Emscripten. The project evolved through contributions by developers with backgrounds at Red Hat, Microsoft, Intel Corporation, Apple Inc., Samsung Electronics, and Facebook (Meta Platforms), with community participation from contributors affiliated with Netflix, Dropbox, GitHub, and Oracle Corporation.

Wasmer advanced alongside milestones in the WebAssembly ecosystem such as the adoption of WASI (WebAssembly System Interface), integration with LLVM toolchains, and collaborations with standards groups including the World Wide Web Consortium and the Bytecode Alliance. Releases tracked improvements in code generation influenced by work at Cranelift, Gustavo Niemeyer-associated projects, and research from institutions like University of Cambridge and Carnegie Mellon University.

Architecture and Components

Wasmer's architecture centers on a modular engine, compilation backends, and host bindings. The engine supports multiple backends including Cranelift, LLVM, and native code generation techniques used by projects such as GraalVM. Components include a module loader, import resolution, memory management informed by research from Google Research and Microsoft Research, and sandboxing mechanisms comparable to technologies from SECCOMP, AppArmor, and SELinux tooling. Host bindings enable integration with ecosystems for Kubernetes, Docker (software), NGINX (web server), and Envoy (software).

Wasmer exposes APIs and SDKs for embedding into projects originating in Rust (programming language), Go (programming language), Python (programming language), Java (programming language), and C#; these bindings echo patterns used in projects like gRPC, GraphQL, and Protocol Buffers for interoperation. The runtime incorporates instrumentation and telemetry inspired by Prometheus (software), Grafana, and OpenTelemetry.

Supported Platforms and Languages

Wasmer targets a wide set of platforms and languages to enable portability across architectures including x86_64, ARM, and RISC-V. Supported operating systems include Linux, Windows, macOS, and real-time platforms related to Zephyr Project and FreeRTOS. Language integrations and toolchain workflows include Rust (programming language), C++, C# and .NET Framework, Go (programming language), Python (programming language), Java (programming language), Node.js (software), and language servers like Language Server Protocol. The runtime often complements build systems and package managers such as Cargo (software), npm, pip (package manager), and Maven.

Use Cases and Adoption

Wasmer is used for serverless deployments on platforms like AWS Lambda, Google Cloud Functions, and Azure Functions, for edge computing with providers such as Cloudflare Workers and Fastly, and for plugin systems in Visual Studio Code and JetBrains products. Enterprises and projects from Shopify, Stripe, GitLab, Atlassian, and Salesforce have explored WebAssembly-based isolation models exemplified by Wasmer integrations. Other adopters include academic projects at Harvard University, Princeton University, and Caltech for secure code execution, and startups in fintech and gaming leveraging portability between Unity (game engine) and Unreal Engine.

Performance and Security Considerations

Performance engineering in Wasmer touches on JIT compilation strategies similar to V8 (JavaScript engine), ahead-of-time compilation like GraalVM, and code generation techniques from LLVM. Benchmarks often compare throughput and latency relative to Wasmtime, Lucet (runtime), and native binaries compiled with GCC and Clang. Security features include sandboxing, capability-based access control inspired by Capsicum (operating system), syscall filtering akin to SECCOMP, and integration with cloud identity systems from Okta, Auth0, and Keycloak. Formal verification and fuzzing efforts draw on tools and projects such as KLEE, AFL (American Fuzzy Lop), and research from SRI International.

Community and Governance

Wasmer is stewarded by a core company and an open-source community with contributors from organizations like GitHub, Red Hat, Mozilla Corporation, Intel Corporation, Microsoft, Google LLC, Fastly, and academic partners including ETH Zurich and Stanford University. Governance follows open-source models similar to Apache Software Foundation-hosted projects and collaborates with cross-industry consortia like the Bytecode Alliance. Community activities include meetups, conferences such as KubeCon, WebAssembly Summit, FOSDEM, and RustConf, and contributions coordinated through platforms like GitHub and GitLab.

Category:WebAssembly