tarmac VS proxy-wasm-go-filter-template

Tarmac is a framework that facilitates the creation of WebAssembly applications. According to its official website, "Framework for writing functions, microservices or monoliths with Web Assembly. Tarmac is language-agnostic and offers built-in support for key/value stores like BoltDB, Redis, and Cassandra, traditional SQL databases like MySQL and Postgres, and core features like mTLS authentication and observability." It is a project worth analyzing as it can speed up the implementation of applications you can host in one of the products I mentioned above.

Kong is an API Gateway used by companies around the world. It has always relied on "plugins" and "filters" that allow users to create new functionalities and add them to routes and services. For users to make these extensions, it was necessary to use the Lua scripting language (NOTE: it is possible to create plugins in Go in versions below 3.4, but unlike Lua, when using Go, performance is lower because Kong executes the logic in a separate process). From version 3.4 onwards, the team added the option to use WebAssembly. In this post, you can learn more about the details and how to implement a simple filter using TinyGo. You can find a template and a filter example to implement rate limit in the project repository.