> ## Documentation Index > Fetch the complete documentation index at: https://docs.youniverse.ai/llms.txt > Use this file to discover all available pages before exploring further. # Performance scans and monitoring > Find slow code, bloat and breakage before your users do. Glass speedometer beside a stack of code blocks being trimmed The **Performance** tab gives your app a health score and lists what's slowing it down or making it fragile — with a one-tap fix for each. ## What it looks for Heavy pages, slow database queries and wasted work. Oversized files, unused libraries and heavy images. Dead code, old content and leftovers from earlier builds. Correctness risks — things likely to fail. Duplicate helpers and unused exports that make future builds slower and pricier. Each finding has a severity. Fixes that only *remove* things are marked **safe** — they can't change what your app does. ## Quick and deep scans Performance audits run on Claude Sonnet at medium reasoning. **Deep** reviews more files, more screenshots and more recent changes than **Quick**. ## Auto-clean Turn on **auto-clean** and Aura applies the safe removals for you, every two weeks or monthly. ## Fix everything at once When Security and Performance both have open items, **Fix all together** sends them as one build — cheaper than two. ## Monitoring: catch breakage Magnifying glass finding a cracked tile in a browser window, with a moon and clock Monitoring checks your app after every build and on a schedule (daily or weekly, always or only when something changed). It reads your code and live error logs and runs a real smoke test of the live app, then reports actual breakage: sign-in, payments, saving data, dead buttons and integrations. It also scrolls each page fully and attaches a screenshot as proof of anything it reports. Automatic monitoring runs on Gemini 3.8 Flash; a check you start yourself runs on Claude Sonnet. ## What it costs | | Cost | | - | - | | Monitoring checks | Free | | Performance audits | Credits, shown in **Usage & billing** | | Applying a fix | A build run | Want a written plan first? Run [`/code-review`](/builder/skills) — it starts from your latest findings. ## Common questions Safe fixes only remove unused things, so they can't change what your app does. Every two weeks or monthly — your choice. It's off until you turn it on. Performance finds what's slow or bloated. Monitoring finds what's broken on the live app. This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.