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Compile-time optimizations reduce runtime overhead

Avoid unnecessary reactive statements

Use derived stores for computed values

Lazy-load routes in SvelteKit

Use `onMount` sparingly to avoid hydration cost

Sanitize HTML when using `{@html}`

Use `fetch` securely in SvelteKit endpoints

Avoid unsafe input binding

Use CSP headers via SvelteKit config

Keep dependencies updated

Track errors with Sentry

Monitor performance with Web Vitals

Use Svelte DevTools

Observe hydrated components in SSR apps

Integrate analytics like Plausible or GA

Use ESLint and Prettier with Svelte plugin

Write tests using Vitest + Testing Library

Follow Svelte Style Guidelines

Use TypeScript in larger apps

Document UI components