Go

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You don’t need Kafka: Building a message queue with only two UNIX signals It’s 2026, Just Use Postgres What canceled my Go context? Notes on Writing Wasm Go 1.26 interactive tour It’s 2026, Just Use Postgres The “Use the Right Tool” Trap You’ve heard the advice: “Use the right tool for the right job.” Sounds wise. So you end up with: Elasticsearch for search Pinecone for vectors Redis for caching MongoDB for documents Kafka for queues InfluxDB for time-series PostgreSQL for… the stuff that’s left Here’s what most people don’t realize: Postgres extensions use the same or better algorithms as specialized databases (in many cases).

Friday, March 13, 2026 Read

Go Tool Trace

淺談 Go Tool Trace - 1 淺談 Go Tool Trace - 2 Go Trace 與使用者自訂追蹤分析淺談 Go Tool Trace - 3 實際分析 Goroutine Analysis Go Tool Trace - 4 從分析到實戰：最佳化 Goroutine 數量 trace Trace is an “event timeline”, not “sampling statistics” go tool trace: used to inspect runtime traces. Its essence is a time-ordered event stream, including: goroutine lifecycle/states: create / runnable / running / waiting / syscall scheduler (G/M/P) related events, scheduling latency blocking time distribution (net / sync / syscall) GC events, STW, heap changes (visible in the trace viewer) Use pprof to find hot spots: who burns CPU, who allocates a lot Use trace to find latency causes: why it’s stuck (scheduling? locks? network? syscalls? GC?) Quick intuition:

Tuesday, January 27, 2026 Read

Why is this running?

Tuesday, December 30, 2025 Read

Mosdns-X

Mosdns-X Make DNS faster and cleaner on Linux: Deploy Mosdns-X install bash <(curl -sL https://raw.githubusercontent.com/lidebyte/bashshell/refs/heads/main/mosdns-x-manager.sh) config sudo tee /etc/mosdns-x/config.yaml > /dev/null <<'EOF' # mosdns-x concurrent query (no split routing) config log: level: info file: /var/log/mosdns-x/mosdns-x.log plugins: # Cache plugin - tag: cache type: cache args: size: 1024 lazy_cache_ttl: 1800 # Concurrent upstreams: take the first usable answer - tag: forward_all type: fast_forward args: upstream: # AliDNS - addr: "udp://223.5.5.5" - addr: "tls://dns.alidns.com" # DNSPod / doh.pub - addr: "udp://119.29.29.29" - addr: "tls://dot.pub" # Cloudflare - addr: "udp://1.1.1.1" - addr: "tls://cloudflare-dns.com" # Google - addr: "udp://8.8.8.8" - addr: "tls://dns.google" # Main pipeline: small cache -> concurrent selection - tag: main type: sequence args: exec: - cache - forward_all # Listen on dual-stack UDP/TCP 53 servers: - exec: main listeners: - addr: :53 protocol: udp - addr: :53 protocol: tcp EOF systemd sudo tee /etc/systemd/system/mosdns.service > /dev/null <<'EOF' [Unit] Description=Mosdns-X DNS Accelerator After=network.target [Service] Type=simple User=root Group=root ExecStart=/usr/local/bin/mosdns-x start --as-service -d /usr/local/bin -c /etc/mosdns-x/config.yaml Restart=always RestartSec=5 StandardOutput=journal StandardError=journal SyslogIdentifier=mosdns [Install] WantedBy=multi-user.target EOF sudo systemctl daemon-reload sudo systemctl enable --now mosdns # Backup system DNS sudo cp -n /etc/resolv.conf /etc/resolv.conf.mosdns-backup # Switch to local Mosdns-X echo -e "nameserver 127.0.0.1\noptions edns0" | sudo tee /etc/resolv.conf # If port 53 is occupied by systemd-resolved, disable it sudo systemctl disable --now systemd-resolved 2>/dev/null || true # If you also want to lock it (prevent DHCP changes), run chattr too: echo -e "nameserver 127.0.0.1\n" > /etc/resolv.conf && chattr +i /etc/resolv.conf # Check process status sudo systemctl status mosdns --no-pager # Test resolution speed (second run should hit cache) dig +stats www.google.com dig +stats www.baidu.com # View logs in real time tail -f /var/log/mosdns-x/mosdns-x.log

Sunday, November 9, 2025 Read

go-synctest

go-synctest func TestAfterFunc(t *testing.T) { synctest.Test(t, func(*testing.T) { ctx, cancel := context.WithCancel(context.Background()) called := false context.AfterFunc(ctx, func() { called = true }) synctest.Wait() // Wait until all goroutines are blocked if called { t.Fatal("AfterFunc was called before cancel") } cancel() synctest.Wait() // Wait again if !called { t.Fatal("AfterFunc was not called after cancel") } }) }

Friday, November 7, 2025 Read

Go Practical Guide: Execute Lua Scripts with go-redis

Go Practical Guide: Execute Lua Scripts with go-redis Redis command Eval Redis package redis.NewScript, script.Run

Tuesday, July 22, 2025 Read

Go Protobuf: The New Opaque API

[Translated] Go Protobuf: The New Opaque API protoc --proto_path=. \ --go_out=./ \ + --go_opt=default_api_level=API_OPAQUE \

Monday, April 7, 2025 Read

GitLab CI Can Automatically Check Code Quality! How to Use SonarQube for Code Quality Checks?

GitLab CI Can Automatically Check Code Quality! How to Use SonarQube for Code Quality Checks? Go_GitLab_SonarQube_Example

Thursday, February 6, 2025 Read

Supply chain attack

Be Alert: Supply Chain Attacks Are Closer Than You Think github.com/siruspen/logrus false github.com/sirupsen/logrus true

Friday, September 13, 2024 Read

Go Articles

Learn gin Parameter Validation with the validator Library - This One Article Is Enough String Constraints excludesall: does not contain any of the UNICODE characters in the parameter, e.g. excludesall=ab excludesrune: does not contain the rune specified by the parameter, e.g. excludesrune=asong startswith: starts with the parameter substring, e.g. startswith=hi endswith: ends with the parameter substring, e.g. endswith=bye contains: contains the parameter substring, e.g. contains=email containsany: contains any of the UNICODE characters in the parameter, e.g. containsany=ab

Tuesday, August 20, 2024 Read

Black Hat Go

https://nostarch.com/blackhatgo https://github.com/blackhat-go/bhg https://github.com/TralahM/blackhat-go Black Hat Go https://github.com/YYRise/bhg

Thursday, August 1, 2024 Read

Illustrating How Data Alignment Affects Memory Usage in Go

Monday, July 8, 2024 Read