一个用 Rust 编写的 DynamoDB 模拟器，支持于 SQLite。作为 HTTP 服务器或 MCP 服务器运行，用于编码代理，嵌入 Rust 和 iOS 应用中作为库，并编译为浏览器的 WebAssembly。

上方 crates.io 徽章显示的是crate版本，仅涵盖Rust库。你安装的所有东西（而非依赖）都带有一个独立的product版本：二进制文件、npm包、容器镜像、浏览器引擎和Action。这就是打印数量dynoxide --version，也是在错误报告中引用的。为什么有两个。

为什么是Dynoxide？

我做Dynoxide是因为DynamoDB Local慢、笨重，而且不能嵌入。它需要一个JVM，而典型的基于Docker的设置会在你做任何有用操作之前，先增加~3秒的冷启动，~209MB的空闲内存，以及~225MB的Docker镜像（盘上~473MB）。如果你在运行集成测试，那就是Docker启动、JVM预热，以及流水线等待。

Dynoxide 是原生二进制。它起步时间为毫秒，空闲时 ~7.2 MB，并以 ~3MB 的下载形式发布。用任何 DynamoDB SDK 对准它，你的测试就能正常工作。

Dynoxide

A DynamoDB emulator in Rust, backed by SQLite. Runs as an HTTP server or an MCP server for coding agents, embeds into Rust and iOS applications as a library, and compiles to WebAssembly for the browser.

The crates.io badge above shows the crate version, which covers the Rust library alone. Everything you install rather than depend on carries a separate product version: the binary, the npm packages, the container images, the browser engine and the Action. That is the number dynoxide --version prints and the one to quote in a bug report. Why there are two.

Why Dynoxide?

I built Dynoxide because DynamoDB Local is slow, heavy, and can’t embed. It needs a JVM, and the typical Docker-based setups adds ~3 seconds of cold-start, ~209 MB of memory at idle, and a ~225MB Docker image (~473 MB on disk) before you’ve done anything useful. If you’re running integration tests, that’s Docker starting, the JVM warming up, and your pipeline waiting.

Dynoxide is a native binary. It starts in milliseconds, idles at ~7.2 MB, and ships as a ~3 MB download. Point any DynamoDB SDK at it and your tests just work.

For Rust projects, there’s also an embedded mode - direct API calls via Database::memory() with no HTTP layer at all. Each test gets an isolated in-memory database with zero startup cost. And because it compiles to a native library with no runtime dependencies, it runs on platforms where DynamoDB Local can’t, including iOS.

Performance

Local Development (Apple Silicon)