debugging Archives

Programming tutorial - IT technology blog

Python Profiling with cProfile and VizTracer: Finding and Fixing Performance Bottlenecks in Real Code

June 23, 2026

After two days of optimizing the wrong parts of a slow data pipeline, I started profiling properly with cProfile and VizTracer. This guide shows you exactly how to find and fix Python performance bottlenecks using real code examples — no guesswork required.

Linux

Debugging Linux Application Crashes with Core Dump and GDB: systemd-coredump Setup Guide

June 3, 2026

When a Linux application crashes in production, the difference between a 20-minute fix and a 3-hour investigation often comes down to whether you captured a core dump. This guide compares ulimit, systemd-coredump, and ABRT, then walks through configuring systemd-coredump and using GDB with coredumpctl for real post-crash analysis.

DevOps

Kubernetes Local Development with Tilt: Ditch the Build-Push-Deploy Loop for Good

June 2, 2026

The traditional Kubernetes build-push-deploy cycle eats 30–90 minutes per workday in waiting time. This guide shows how to set up Tilt with k3d and a local registry to get live file sync, real-time auto-reload, and in-cluster debugging — cutting iteration cycles from 3 minutes to under 10 seconds.

Programming

Hunting Node.js Memory Leaks: A Practical Guide to Chrome DevTools and Heap Snapshots

May 14, 2026

Master the 'Three Snapshot' technique using Chrome DevTools to pinpoint and fix Node.js memory leaks. A senior developer's guide to stabilizing the V8 heap and preventing OOM crashes.

Networking

Beyond Telnet: Mastering Netcat and Socat for Linux Network Triage

April 27, 2026

Master Netcat and Socat for precise Linux network debugging. This guide provides practical examples for port scanning, 100MB/s+ file transfers, and secure SSL relays.

Linux

Advanced Linux Debugging: Hunting Silent Bugs with strace and ltrace

April 4, 2026

Master strace and ltrace to solve Linux application hangs and performance issues. Learn how to track syscalls, library calls, and identify bottlenecks with real-world examples.

How to Use Claude for Coding & Debugging: A Developer’s Real-World Guide

March 8, 2026

After six months of daily use in production, this guide covers what actually works when using Claude for coding and debugging — from quick CLI setup to advanced refactoring workflows and practical integration tips.