The newly improved Authzed Playground experience utilizes WebAssembly (WASM) technology, allowing for faster and more efficient processing of authorization operations. The playground's development environment is now powered by SpiceDB, an open-source permissions database inspired by Google's Zanzibar, providing a flexible configuration system. To achieve this, the developers created a JavaScript interface to talk to SpiceDB from within a browser, cached aggressively, and loaded the compiled Go binary into the JavaScript runtime using the wasm_exec.js library. This integration enables near-instant responses from SpiceDB, reducing latency by 90% compared to previous grpc-web requests. The use of WASM also allows for sharing non-JavaScript implementations between clients and servers, facilitating a seamless experience in the playground.