Mordern WebApps and the Different Layers of Caching

🚀 If your webapp feels slow in 2025, it’s probably because you’re running 1 layer of caching while the rest of us are running FIVE.

Most teams: “We use caching.”

Also most teams: have no idea where their requests actually go. 😅
Here’s how a real modern stack layers caching like a boss:

🥇 1. Cloudflare (Edge Caching) Your first line of defense. HTML, assets, APIs, served before your server even knows a request happened.

🥈 2. Browser Cache Free performance. Let users store what doesn’t need a round trip. Stop re-downloading assets for no reason.

🥉 3. Next.js Caching (ISR / Revalidation) Pages served instantly from Next’s own cache. Revalidated quietly in the background. Your backend sleeps peacefully.

⚙️ 4. Backend Logic Caching Expensive computations cached in-memory or Redis. “Do once, serve forever” mode activated.

🗄️ 5. PostgreSQL Cache Hot data stays in RAM. Postgres becomes a read-performance monster if you let it.

👉 The truth nobody wants to hear: If these 5 layers aren’t doing their thing, your “performance problems” aren’t infrastructure.They’re just… skill issue.

Build like you’re stacking armor plates. Every request that hits your DB is a failure. 🛡️⚡