📰 PortPeek Engineering Journal & Releases

Engineering & Systems Architecture

Technical deep dives, Windows kernel networking, performance benchmarks, and lessons learned building ultra-lightweight native developer tools.

Featured Release • Architecture Deep Dive

Introducing PortPeek v0.2.0: Why We Built a ~500 KB Native C++ Port Inspector for Windows

Why we rejected Electron and WebView2, how we queried Windows kernel TCP tables in sub-2ms with Win32 APIs, and why your background developer utilities should consume 0.0% idle CPU.

Ayush Singh • August 2026 • 6 min read

Read Deep Dive →

Architecture Latency Benchmark

⚡ PortPeek (Win32 & C++17)

< 0.05 ms / 0.0% CPU

🐚 CLI netstat / PowerShell pipe

120 - 350 ms

⚛️ Electron / Chromium wrapper

350+ ms / 450 MB RAM

Benchmarked on Windows 11 Pro 64-bit with 24 active listening sockets.

Troubleshooting & Guide

How to Fix "Error: listen EADDRINUSE: address already in use :::3000" on Windows 11

Understand why Node.js, Next.js, and Vite fail with EADDRINUSE, why orphaned child processes keep sockets locked, and how to stop them without rebooting.

Ayush Singh • 4 min read Read →

Systems Architecture

Inside Windows Kernel TCP Tables: GetExtendedTcpTable vs CLI netstat

A deep dive into `iphlpapi.dll`, querying IPv4/IPv6 socket owners directly in memory, and why parsing CLI text streams is a major performance anti-pattern.

Ayush Singh • 8 min read Read →

Networking Protocols

Why 127.0.0.1 is Not 0.0.0.0: Testing Localhost on Mobile Wi-Fi

Demystifying loopback interface bindings, why mobile devices cannot connect to `127.0.0.1`, and how to properly configure Windows Defender Firewall.

Ayush Singh • 5 min read Read →

Performance Engineering

The Hidden Cost of Electron: Why a Tray Utility Shouldn't Eat 400 MB RAM

Analyzing the memory footprint of Chromium renderers, V8 heaps, and GPU helper processes for background utilities that should just sit quietly in your system tray.

Ayush Singh • 7 min read Read →

Privacy & Security

Zero-Telemetry by Design: Why Developer Tools Belong 100% Offline

Why PortPeek makes zero outbound HTTP requests, collects no analytics, requires no user accounts, and runs purely inside your local Windows kernel boundaries.

Ayush Singh • 5 min read Read →

Web Tooling & Bundlers

Vite, Port 5173, and Hot Module Replacement on Windows Winsock

Why Evan You chose 5173 (spelling "VITE" on a phone keypad), how Vite negotiates port increments, and optimizing WebSocket HMR on Windows 11.

Ayush Singh • 6 min read Read →