Tech Blog
Frontend deep dives, architecture design, performance optimization, and development insights
PostgreSQL Connection Pool: 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
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 2026: Choose the Right Tool for Each Job
A practical comparison framework for free online PDF tools: compression, PDF to Word, merge, split, OCR, privacy, and when browser-local tools are safer.
OpenTelemetry Trace Correlation: 5 End-to-End Tracing Patterns
From cross-service trace propagation to context correlation and baggage passing: the complete production OpenTelemetry trace correlation implementation.
OpenTelemetry LLM Observability: End-to-End AI App Monitoring
Guide to monitoring LLM applications with OpenTelemetry: semantic conventions, Python implementation, Grafana dashboards, and cost/quality monitoring.
OpenTelemetry Observability: Unified Traces, Metrics
Build a unified observability system with OpenTelemetry: Java Agent auto-instrumentation, Collector deployment, sampling strategies, and 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.
Nuxt 4 Server Routing: 5 SSR Optimization Patterns with Nitro
Complete guide to Nuxt 4 server routing and SSR optimization with Nitro: API design, hybrid rendering, server middleware authentication, and edge deployment.
Nuxt 4 Full-Stack Authentication: OAuth2 to Passkey
Guide to Nuxt 4 full-stack authentication: OAuth2/OIDC integration, JWT session management, Passkey/WebAuthn, role-based access control, and security.
Nuxt 4 Layer Architecture: Enterprise Frontend Engineering
A guide to Nuxt 4 Layer modular architecture: multi-layer composition, module publishing, enterprise Layer templates, and production-level Layer governance.
Nuxt 4 + AI Streaming SSR: LLM App First Paint 3s to 300ms
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
A complete guide to the WebAssembly Component Model: WIT interface definition, WASI 0.2/0.3 capabilities, component linking, and plugin architectures.
Node.js Performance Tuning: Flame Graphs, Memory, Event Loop
A walkthrough of the Node.js performance toolchain: 0x/clinic.js flame graphs, V8 heap snapshots, event loop latency monitoring, and CPU profiling.
Node.js Streams: Readable, Writable, Transform & Backpressure
From basic stream concepts to backpressure control, file processing to HTTP response streaming — master the core principles of Node.js Streams.
Nuxt 4 Edge Rendering: 5 Deployment Strategies for 3x SSR
The complete Nuxt 4 edge rendering guide: Nitro internals, edge deployment, hybrid rendering strategies, Cloudflare Workers integration, and edge caching.
Next.js Streaming SSR: Suspense to Progressive Rendering
From Suspense boundaries to streaming HTML, progressive hydration to data fetching patterns, production performance optimization
Nginx High Concurrency Configuration & Performance Tuning
From event-driven architecture to load balancing, connection pool tuning to security hardening — master Nginx configuration for high-concurrency scenarios.
Next.js App Router Performance: 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: Build a 200+ Page High-Performance Site
A deep dive into Next.js App Router static export: generateStaticParams, multilingual routing, build optimization, and lessons from a 200+ page static site.
Headroom-Style LLM Token Optimization: Cut Context Costs
A practical guide to LLM token cost optimization inspired by Headroom-style context compression: pruning, caching, model routing, and safe rollout.