📰 Dev.to · kol kol

A one-line change in production caused a 3-day investigation. Here's the story and the checklist I now use before every 'quick fix'.

How I Cut LLM Inference Costs by 78% Without Sacrificing Quality We were spending $14,200/month on...

I asked a room of 50 developers: "What's the hardest part of your job?" Not coding. Not debugging....

Why Your Database Is Slow (And It's Not What You Think) Most developers blame their...

Published: May 20, 2026 Ask any developer what their strongest skill is, and you'll hear a...

200K line monolithic React app took 12 min to build. Here's how we split it with module federation and cut initial bundle from 6MB to 350KB.

React reconciliation adds 16-50ms per update. Here's how I built a live preview with 0-3ms latency using Web Workers and direct DOM manipulation.

Write the code explanation FIRST, then write the code. Here's why this simple habit eliminates 60% of PR rework.

I migrated a production Next.js app to Server Components. Bundle went from 482KB to 89KB. Here's exactly how and where most devs mess it up.

Stop using `any`. Learn the generic patterns that eliminate 95% of runtime type errors with zero runtime overhead.

I Cut My LLM API Bill by 73% — Here's the Exact Optimization Playbook Running LLMs in...

Contract-First vs Assertion-First: Which Pattern Makes Your LLM Agents More Reliable? When...

Add Real Video QoE Telemetry to Your Player in an Afternoon Starter code available on the...

TL;DR: Running a full LLM benchmark suite (GSM8K + HellaSwag + TruthfulQA) on a single T4 GPU costs...

Complete PaaS Exit Playbook: Heroku to Self-Hosted in 72 Hours Current Situation...