Perf Lens — performance-focused code review

Paste code — a module, a component, a handler, a query layer — and get a performance review: severity-ranked findings each with a corrected snippet, the quick wins worth shipping first, an optimized rewrite of your worst hotspot, and a five-area health check across data access, memory, CPU, network and rendering. A free instant prescan flags the classic anti-patterns before you run anything. Derived from @mastra-ai/performance-review.

Every public app is built from a security-scanned skill and must pass a clean scan — skill and frontend — before it can be listed. Have a skill of your own? Turn it into an app — or read the step-by-step walkthrough.