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Harrison Guo

Senior backend platform engineer. Distributed systems, Go runtime, LLM agent infrastructure. Writing deep-dive notes at harrisonsec.com

Location Vancouver, Canada Joined Joined on  Email address gzxharrison@gmail.com Personal website https://harrisonsec.com github website twitter website
Node Turns Waiting Into Events. Go Moves Context Switching Into User Space.
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Node Turns Waiting Into Events. Go Moves Context Switching Into User Space.

#go #node #concurrency #javascript
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13 min read
gRPC Interceptors in Production: Design Patterns That Survive Real Load
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gRPC Interceptors in Production: Design Patterns That Survive Real Load

#go #grpc #interceptors
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8 min read
Go Generics, One Year In: Which Promises Held, Which Didn't
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Go Generics, One Year In: Which Promises Held, Which Didn't

#go #generics #typeparameters
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7 min read
Go Profiling in Anger: pprof, Escape Analysis, and Inlining Without Magic
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Go Profiling in Anger: pprof, Escape Analysis, and Inlining Without Magic

#go #performance #pprof
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6 min read
sync.Pool in Go: When It Actually Helps, and When It Quietly Hurts
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sync.Pool in Go: When It Actually Helps, and When It Quietly Hurts

#go #performance #syncpool
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6 min read
IronSys: A Production Blueprint for Modern Concurrency
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IronSys: A Production Blueprint for Modern Concurrency

#concurrency #systemdesign #go #architecture
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8 min read
Docker Kubernetes: What They Really Changed (It's Not What You Think)
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Docker Kubernetes: What They Really Changed (It's Not What You Think)

#docker #kubernetes #containers #devops
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8 min read
Observability and Cost Attribution: Why One Pipeline Isn't Enough
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Observability and Cost Attribution: Why One Pipeline Isn't Enough

#observability #billing #costattribution #opentelemetry
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7 min read
The 90% Problem: Why Most AI Agents Are Still Broken
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The 90% Problem: Why Most AI Agents Are Still Broken

#agents #architecture #claudecode #openclaw
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7 min read
Testing Real-World Go Backends Isn't What Many People Think
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Testing Real-World Go Backends Isn't What Many People Think

#go #testing #backendengineering
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8 min read
Scale-Up vs Scale-Out: Why Every Language Wins Somewhere
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Scale-Up vs Scale-Out: Why Every Language Wins Somewhere

#programminglanguages #systemdesign #scale #rust
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7 min read
From Locks to Actors: The Four Pillars of Modern Concurrency
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From Locks to Actors: The Four Pillars of Modern Concurrency

#concurrency #systemdesign #go #erlang
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8 min read
RPC vs NATS: It's Not About Sync vs Async — It's About Who Owns Completion
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RPC vs NATS: It's Not About Sync vs Async — It's About Who Owns Completion

#distributedsystems #rpc #nats #grpc
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7 min read
Go Context in Distributed Systems: What Actually Works in Production
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Go Context in Distributed Systems: What Actually Works in Production

#go #context #concurrency
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8 min read
Go's Concurrency Is About Structure, Not Speed: chan and context as Lifecycle Primitives
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Go's Concurrency Is About Structure, Not Speed: chan and context as Lifecycle Primitives

#go #concurrency #channels
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8 min read
Why Go Handles Millions of Connections: User-Space Context Switching, Explained
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Why Go Handles Millions of Connections: User-Space Context Switching, Explained

#go #concurrency #distributedsystems
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6 min read
Claude Code Deep Dive Part 4: Why It Uses Markdown Files Instead of Vector DBs
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Claude Code Deep Dive Part 4: Why It Uses Markdown Files Instead of Vector DBs

#claudecode #memory #agents #openclaw
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7 min read
Claude Code Deep Dive Part 3: The 5-Level Compression Pipeline Behind 1M Tokens
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Claude Code Deep Dive Part 3: The 5-Level Compression Pipeline Behind 1M Tokens

#claudecode #contextengineering #agents #compression
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8 min read
Claude Code + Codex Plugin: Two AI Brains, One Terminal
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Claude Code + Codex Plugin: Two AI Brains, One Terminal

#claudecode #codex #agents #openai
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5 min read
Claude Code Deep Dive Part 2: The 1,421-Line While Loop That Runs Everything
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Claude Code Deep Dive Part 2: The 1,421-Line While Loop That Runs Everything

#claudecode #agents #architecture #systemdesign
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7 min read
Claude Code Source Leaked: 5 Hidden Features Found in 510K Lines of Code
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Claude Code Source Leaked: 5 Hidden Features Found in 510K Lines of Code

#claudecode #anthropic #agents #security
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5 min read
The AI Stack Explained: LLM Talks, Program Walks
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The AI Stack Explained: LLM Talks, Program Walks

#ai #llm #mcp #agents
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6 min read
Why Your "Fail-Fast" Strategy is Killing Your Distributed System (and How to Fix It)
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Why Your "Fail-Fast" Strategy is Killing Your Distributed System (and How to Fix It)

#distributedsystems #redis #systemdesign #backend
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9 min read
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