Building a site has never been cheaper, but making it fast still costs attention and your user's resources.

Until Apple's boot is removed from the web's face, you never have to hand it to them.

Keep your map rendering when the network drops. MBTiles-backed offline tile management for Flutter maps. Pre-cache routes and regions, resolve tiles locally when offline. Works with flutter_map. Changelog excerpt: - Add `PerformanceBudget`— stateful frame-timing budget tracker for tile-render advisory cognitive-load management. Integrator-supplied `FrameTimingProvider`interface; per-frame budget checked against `PerformanceBudgetConfig`; broadcast `budgetEvents`stream emits `BudgetWarning`(75% sustained) / `BudgetExhausted`(100% sustained over `sustainedFrames`consecutive frames). Mirrors the `GlanceBudgetTracker`pattern from `navigation_safety`0.9.0 (caution-add-only / severity-not-profile / driver-alway[...]

Camera follow, free look, route overview — without reinventing viewport logic. Declarative state machine for navigation map cameras and six-layer composition. Bring your own renderer. Changelog excerpt: - Add `ViewportRenderBudgetBloc`— composes `PerformanceBudget`(from `offline_tiles`0.5.0) and `DataBudget`(from `snow_rendering`0.2.0) streams into a single `ViewportRenderState`with a `RenderFidelity`recommendation (`high`/ `medium`/ `low`). - **Caution-add-direction-wins on conflict**(load-bearing): any `BudgetExhausted`on either stream → fidelity LOW; otherwise any `BudgetWarning`→ fidelity MEDIUM; else HIGH. The bloc never RAISES fidelity in response to a stream event; reset returns to HIGH.[...]

Lighthouse CI fails your builds when performance drops. I run it on every pull request.