Tech Blog
Frontend deep dives, architecture design, performance optimization, and development insights
PostgreSQL Connection Pool Optimization: 6 Production Patterns from PgBouncer to Pgpool-II
From PgBouncer three modes to Pgpool-II, Odyssey to connection sizing, monitoring to production deployment
pdf-lib Architecture: Pure JavaScript PDF Create, Edit, and Merge
A source-level tour of pdf-lib—PDF object model, cross-reference tables, stream compression, font embedding—and how ToolsKu builds 20+ PDF tools on top of it.
Free Online PDF Tools in 2026: How to Choose the Right Tool for Each Job
A practical comparison framework for free online PDF tools: compression, PDF to Word, merge, split, OCR, privacy, file limits, and when browser-local tools are safer.
OpenTelemetry Trace Correlation in Practice: 5 Patterns for End-to-End Distributed Tracing
From cross-service trace propagation to context correlation and baggage passing, covering the complete production-grade OpenTelemetry trace correlation implementation
OpenTelemetry LLM Observability: End-to-End AI Application Monitoring Guide
Complete guide to monitoring LLM applications with OpenTelemetry, covering semantic conventions, Python implementation, Grafana dashboards, cost and quality monitoring, and troubleshooting
OpenTelemetry Observability in Practice: Unified Traces, Metrics, Logs Collection
Build a unified observability system with OpenTelemetry, covering Java Agent auto-instrumentation, Collector deployment, sampling strategies and production best practices
Nuxt 4 Server Components: Building Hybrid SSR Applications
Master Nuxt 4 server components architecture, data fetching patterns, hybrid rendering strategies, and performance optimization for production SSR applications in 2026.
Nuxt 4 Server Routing: 5 Core Patterns for SSR Optimization with Nitro Engine
Complete guide to Nuxt 4 server routing and SSR optimization with Nitro engine, covering API design, hybrid rendering strategies, server middleware authentication, data fetching with caching, and production edge deployment
Nuxt 4 Full-Stack Authentication: 5 Production Patterns from OAuth2 to Passkey
Complete guide to Nuxt 4 full-stack authentication, covering OAuth2/OIDC integration, JWT session management, Passkey/WebAuthn, role-based access control, and production security
Nuxt 4 Layer Modular Architecture: Enterprise Frontend Engineering Complete Guide 2026
A comprehensive guide to Nuxt 4 Layer modular architecture for enterprise frontend engineering, covering multi-layer composition, module publishing, enterprise Layer templates, and production-level Layer governance with production-ready code.
Nuxt4 + AI Streaming SSR: Optimizing LLM App First Paint from 3s to 300ms in 2026
Nuxt4 SSR optimization guide for AI streaming rendering, covering Server Components, Edge SSR deployment, streaming rendering, and performance tuning
WebAssembly Component Model Deep Dive (2026): WIT, WASI 0.3 & Polyglot Composition
A complete guide — WIT interface definition, WASI 0.2/0.3 capabilities, language binding toolchains, component linking, plugin architectures, and edge computing patterns.
Node.js Performance Analysis and Tuning in Practice: A Complete Troubleshooting Path for Flame Graphs, Memory Leaks, and Event Loop Blocking
A systematic walkthrough of the complete Node.js performance analysis toolchain, covering 0x/clinic.js flame graph generation, V8 heap snapshots and heap comparison, event loop latency monitoring, CPU profiling, and continuous performance monitoring in production.
Node.js Stream Processing in Practice: A Complete Guide to Readable, Writable, Transform, and Backpressure
From basic stream concepts to backpressure control, from file processing to HTTP response streaming, master the core principles and production-grade usage of Node.js Streams.
Nuxt 4 Edge Rendering in Practice: 5 Deployment Strategies for 3x Faster SSR
From Nitro engine internals to edge deployment, hybrid rendering strategies to Cloudflare Workers integration, edge caching to global acceleration — the complete Nuxt 4 edge rendering guide
Next.js Streaming SSR: 5 Production Patterns from Suspense to Progressive Rendering
From Suspense boundaries to streaming HTML, progressive hydration to data fetching patterns, production performance optimization
Nginx High Concurrency Configuration & Performance Optimization in Practice
From event-driven architecture to load balancing algorithms, from connection pool tuning to security hardening — master core Nginx configuration and optimization techniques for high-concurrency scenarios.
Next.js App Router Performance: 7 Key Optimization Strategies from SSR to Streaming Rendering
From SSR optimization to streaming rendering, React Server Components to caching strategies for complete Next.js performance tuning
Next.js Static Export Deep Dive: Building a 200+ Page High-Performance Tool Site
A technical deep dive into Next.js App Router static export—generateStaticParams, multilingual routing, build optimizations, and real-world architecture lessons from a 200+ page static tool site.
Headroom-Style LLM Token Optimization: Reduce Context Cost Without Breaking Answers
A practical guide to LLM token cost optimization inspired by Headroom-style context compression: pruning, caching, model routing, evaluation, and safe rollout patterns.