Performance

WebUI's value proposition is speed and low memory usage. Every change to core Rust crates, @microsoft/webui-framework, or @microsoft/webui-router must be evaluated through two lenses: throughput (how fast) and memory (how little).

Server memory is not cheap. Client memory is not unlimited. Every allocation that can be avoided is a win on both sides.

Use this skill when modifying any performance-sensitive code across the stack.

Rust - speed rules

These apply to webui-handler, webui-state, webui-expressions, webui-parser, webui-protocol, webui-ffi, and webui-node.