Iurii Uses: #Performance

pi-pi.ee — Live Custom-Colour Preview

Recolour a product photo to any colour in the browser, instantly — an SVG duotone filter tints transparent master images on the fly, so a shop can offer

HTPBE? — PDF Verification Workflow Animation

Looping SVG animation illustrating a PDF verification pipeline — document stack, cloud processing, and green/red folder sorting — built with pure CSS

Pikkuna — E-commerce for Vinyl Curtains & PVC Products

International e-commerce platform with 30 locales, product configurators, AI chatbot, and fully automated order flow: Stripe → Zoho CRM → Airtable → Mailgun →

Run next/image on a self-hosted VPS without OOM: why the optimizer is memory-hungry, how to bound device sizes, formats, and cache, or offload it.

Batch PDF generation in Node.js without OOM: concurrency limits, back-pressure, releasing renderers between docs, and why Promise.all(map) fails at scale.

IndexNow implementation guide for Next.js: key generation, TypeScript client with retry logic, GitHub Actions workflow, and pitfalls that break submissions

Next.js view counter with Upstash Redis over HTTP: atomic INCR, Edge Runtime for zero cold starts, React Strict Mode fix, and slug namespace gotchas.

React masonry layout that keeps left-to-right card order with variable heights — where the popular CSS column-count trick silently breaks.

UUID v7 vs v4 in PostgreSQL: why random UUIDs fragment B-tree indexes, how UUID v7 fixes it, benchmarks at 5M rows, and Drizzle ORM migration steps.

CSS SVG animation with pure @keyframes: sync multiple tracks, fix the SVG transform override trap, and build smooth loops without GSAP or Framer Motion.

Next.js dynamic OG images with Satori: why opengraph-image.tsx hangs Turbopack at 400% CPU, how API routes fix it, plus WOFF2 and Twitter card gotchas.

Technical SEO built into Next.js: server-side rendering, dynamic meta tags, JSON-LD structured data, and automatic sitemap generation — no plugins, just code.

Redis rate limiting for APIs: sliding window ZADD with Lua atomicity, in-memory fallback, multi-tier limits by IP and API key, and developer-friendly response