The Receipts Ledger: Every Dollar This Infrastructure Didn't Spend
Pure synthesis, no new numbers: the $2,500/yr VPN saving, the $20 droplet vs $2,000 SaaS quote, the $20/mo KV line deleted, and the zero-bill pipelines — each linked to its proof.
~/tags/performance
Performance
$ cat ~/tags/performance — 3 entries
~/blog ×3
I Deleted My Vercel KV Instance: Rate Limiting on the Free Tier Without a Data Store
Vercel KV cost me $64 in idle months and caused one 26-minute connection-pool outage. I moved the fast path to a per-process sliding window and the durable counters to Postgres — $20/month to zero, and p99 latency on /api/search from 310 ms to 12 ms.
WooCommerce Optimization: Caching & Core Web Vitals
How I optimized a heavy WooCommerce store on a DigitalOcean droplet to pass Google's Core Web Vitals — cutting TTFB from 1,200ms to 300ms (−75%) and improving mobile conversion rates within 30 days.