Go and CPU Caches
Credits: unsplash.comAccording to Jackie Stewart, a three-time world champion F1 driver, having an understanding of how a car works made him a better pilot. “You don’t have to be an engineer to be a racing driver, but you do have to have Mechanical Sympathy†Martin Thompson (the designer of the LMAX Disruptor) applied the concept of mechanical sympathy to programming. In a nutshell, understanding
Why Go and not Rust?
What's the role of Go in a universe where Rust exists? Imagine you're a developer who mainly works with Go. You go to an event and, while chatting with some people, you decide to share with them the news that you wrote a small tool that does something. You claim that since you wrote it in Go, it's fairly fast, it's a single binary, etc. The group seems pleased with your recount and you start feeli
Go - コンãƒã‚¸ãƒƒãƒˆåž‹ - スライス - スライス内ã§ã®æŠ€æ³• - スライスã€å›žè»¢ã€append関数 | Kamimura's blog
Go - コンãƒã‚¸ãƒƒãƒˆåž‹ - スライス - スライス内ã§ã®æŠ€æ³• - スライスã€å›žè»¢ã€append関数
Property-Based Testing Advent Calendar 2018 - Qiita
テストケースをã„ã„æ„Ÿã˜ã«è‡ªå‹•ç”Ÿæˆã—ã€ã‚‚ã‚Šã‚‚ã‚Šãƒã‚°ã‚’å–ã‚ŠãªãŒã‚‰ã‚‚å¯èªæ€§ãƒ»ãƒ¡ãƒ³ãƒ†ãƒŠãƒ³ã‚¹æ€§ã®é«˜ã„テストãŒæ›¸ã‘ã‚‹ã¨ã„ã†å™‚ã®ã€Property-Based Testing (PBT) ã«ã¤ã„ã¦ã®è¨˜äº‹ã‚’書ãã¾ã™ã€‚ Property-Based Testing with PropEr, Erlang, and Elixir ã‚’èªã‚“ã§åŸºæœ¬çš„ãªå†…容を整ç†ã—ãŸã‚ã¨ã€é©å½“㪠OSS ã®ãƒ†ã‚¹ãƒˆã‚’書ã„ã¦ã¿ãŸã‚Šã€ã€Œã¿ã‚“ãªã®ãƒ‡ãƒ¼ã‚¿æ§‹é€ ã€ã¨ã„ã†æœ¬ã®å®Ÿè£…ã« Property-Based ãªãƒ†ã‚¹ãƒˆã‚’書ã„ãŸã‚Šã—ãªãŒã‚‰è§£èª¬ã‚’ã—よã†ã¨æ€ã£ã¦ã„ã¾ã™ã€‚ å‚考文献㯠Erlang/Elixir を採用ã—ã¦ãŠã‚Šã€ã€Œã¿ã‚“ãªã®ãƒ‡ãƒ¼ã‚¿æ§‹é€ ã€ã®ã‚µãƒ³ãƒ—ル実装㯠Golang ã§æ›¸ã„ãŸãŸã‚ã€ç§ã®è¨˜äº‹ã¯ãれらã®è¨€èªžã§ã‚„ã£ã¦ã„ã予定ã§ã™ã€‚一方ã€PBT ã¨ã„ãˆã° Scala ã‚„ Haskell ãŒç‰¹ã«æœ‰åã ã¨æ€ã†ã®ã§ã€ã“れらã®è¨€èªžã§ã® PBT ã«ã¤ã„ã¦è¨˜äº‹
Big Sky :: 書評「Go言語ã«ã‚ˆã‚‹ä¸¦è¡Œå‡¦ç†ã€
O'Reilly Japan, Inc. 様ã«çŒ®æœ¬é ‚ãã¾ã—ãŸã€‚ã‚ã‚ŠãŒã¨ã†ã”ã–ã„ã¾ã™ã€‚ ãã—ã¦çŒ®æœ¬é ‚ãéš›ã«ãŠå£°ã‚’掛ã‘ã¦é ‚ã„ãŸã€æœ¬æ›¸ã®ç¿»è¨³ã‚’担当ã•ã‚ŒãŸ ymotongpoo ã•ã‚“ã«ã‚‚ãŠç¤¼ã‚’申ã—上ã’ã¾ã™ã€‚ã‚ã‚ŠãŒã¨ã†ã”ã–ã„ã¾ã™ã€‚ 本書ã®è¨³ã¯éžå¸¸ã«ç´ 晴らã—ãã€ã¨ã¦ã‚‚原文ãŒè‹±æ–‡ã§ã‚ã£ãŸã¨ã¯æ€ãˆãªã„ã»ã©ç¶ºéº—ã§ã€èªã‚“ã§ã„ãä¸ã§ã€ŒåŽŸæ–‡ã§ã©ã®æ§˜ã«è¡¨ç¾ã•ã‚Œã¦ã„ã‚‹ã‚“ã ã‚ã†ã€ã¨ã„ã£ãŸå¼•ã£ã‹ã‹ã‚Šã‚‚ç„¡ãã€ã¨ã¦ã‚‚スムーズã«èªã¿é€²ã‚られã¾ã—ãŸã€‚ Go 言語ã«é–¢ã‚ã£ã¦éšåˆ†ã¨é•·ããªã£ã¦ãã¾ã—ãŸã€‚åˆã‚㦠Go を知ã£ã¦ã‹ã‚‰ãƒ¦ãƒ¼ã‚¶ãŒã©ã‚“ã©ã‚“増ãˆã‚‹æ§˜ã‚’見る事ãŒå‡ºæ¥ã‚‹ã®ã¯æ£ç›´ã«è¨€ã£ã¦éžå¸¸ã«å¬‰ã—ã„ã§ã™ã€‚ ãµã¨ Go ã®é…力ã¯ä½•ã‹ã¨èžã‹ã‚ŒãŸã‚‰å¹¾ã¤ã‹æŒ™ã’る事ãŒå‡ºæ¥ã¾ã™ãŒã€é–“é•ã„ãªãé¸ã¶ã®ãŒã€ŒéžåŒæœŸå‡¦ç†ã®ç°¡å˜ã•ã€ã§ã™ã€‚ã“ã‚Œã¾ã§å¤šãã®é–‹ç™ºè€…㌠OS スレッドã§å®Ÿç¾ã—ã¦ããŸéžåŒæœŸå‡¦ç†ã‚’ã€Go 言語ã¯å°‘ãªã„イディオムã¨ã‚¤ãƒ³ãƒ†ãƒªã‚¸ã‚§ãƒ³ãƒˆãªãƒ©ãƒ³ã‚¿ã‚¤ãƒ ã‚’
ãªãœGo言語ã¯æˆåŠŸã‚’åŽã‚ã‚‹ã“ã¨ãŒã§ããŸã®ã‹ - Googleã®äººãŒèªžã‚‹ï¼ˆç¿»è¨³ï¼‰ - Qiita
Goã®ç‰¹å¾´ã¨ãªãœGoãŒã“ã“ã¾ã§æˆåŠŸã—ãŸã‹ã‚’Googleã®æ–¹ãŒã¾ã¨ã‚ãŸã‚¹ãƒ©ã‚¤ãƒ‰ãŒã¨ã¦ã‚‚「簡潔ã€ã§åˆ†ã‹ã‚Šã‚„ã™ã‹ã£ãŸã®ã§ã€ç¿»è¨³ï¼ˆè¦ç´„）ã—ã¦ã¾ã¨ã‚ã¦ã¿ã¾ã—ãŸã€‚ Go使ã„ã¨ã—ã¦ã€Goã®æ€æƒ³ã‚’æ‰ãˆãŸä¸Šã§é–‹ç™ºã‚’進ã‚ã¦ã„ããŸã„ã§ã™ã€‚ Rob Pike, "Simplicity is Complicated", 2015 ãªãœGoã¯æˆåŠŸã—ãŸã‹ よã挙ã’られã¦ã„ã‚‹ç†ç”±ã«ã¯ コンパイルã®ã‚¹ãƒ”ード 実行スピード デプãƒã‚¤ ツール ライブラリ ãŒã‚ã‚‹ãŒã€ã“れらã¯è¨€èªžã®ç‰¹å¾´ã§ã¯ãªã„。 ã‚ã£ãŸã«æŒ™ã’られãªã„ç†ç”±ã¨ã—ã¦ã¯ã€ã‚¤ãƒ³ã‚¿ãƒ¼ãƒ•ã‚§ãƒ¼ã‚¹ã‚„並行性ã¨ã„ã£ãŸçœŸã®è¨€èªžã®ç‰¹å¾´ãŒã‚る。 ã“れらã¯é‡è¦ã§ã¯ã‚ã‚‹ãŒæœ¬å½“ã®ç”ãˆã§ã¯ãªã„。 ç§ã®ç”ãˆã¯ã€Simplicity（簡潔ã•ï¼‰ã§ã‚る。 Java, JavaScript (ECMAScript), Typescript, C#, C++, Hack (PHP)ãªã©ã®è©±ã‚’èžã„ã¦ã„ã‚‹ã¨ã€ã“ã‚Œ
Go言語ã§TCPやソケット通信を多é‡åŒ–，高速化ã™ã‚‹smux(ソケットマルãƒãƒ—レクサ)ã‚’ã¤ãã£ãŸ · THINKING MEGANE
サーãƒé–“ã§åˆ†æ•£å‡¦ç†ã‚’è¡Œã†éš›ã®ç›¸äº’通信ã«ãŠã‘るボトルãƒãƒƒã‚¯ã‚’解消ã™ã‚‹ãŸã‚，smux(Socket multiplexer)を開発ã—ã¦ã„る． サーãƒé–“ã®ç›¸äº’通信ã«ãŠã‘るボトルãƒãƒƒã‚¯ã¨ãã®è§£æ±ºç– 一対ã®ã‚µãƒ¼ãƒé–“ã§å¤šæ•°ã®ãƒªã‚¯ã‚¨ã‚¹ãƒˆã¨ãƒ¬ã‚¹ãƒãƒ³ã‚¹ãŒé€å—ä¿¡ã•ã‚Œï¼Œä¿¡é ¼æ€§ã®é«˜ã„通信ã¨ã—ã¦TCPを利用ã™ã‚‹å ´åˆï¼Œã‚³ãƒã‚¯ã‚·ãƒ§ãƒ³ç¢ºç«‹ã®ã‚ªãƒ¼ãƒãƒ¼ãƒ˜ãƒƒãƒ‰ã‚’排除ã™ã‚‹ãŸã‚ã«æŽ¥ç¶šã®å†åˆ©ç”¨ãŒè¡Œã‚れる．ã—ã‹ã—ãªãŒã‚‰ï¼Œã‚¯ãƒ©ã‚¤ã‚¢ãƒ³ãƒˆã¯é€ä¿¡ã«å¯¾ã™ã‚‹å—ä¿¡ã‚’å¾…ã¤å¿…è¦ãŒã‚ã‚‹ãŸã‚，レスãƒãƒ³ã‚¹ã¾ã§ã«å¹¾è¨±ã‹ã®å‡¦ç†æ™‚é–“ã‚’è¦ã™ã‚‹çŠ¶æ³ã§ã¯é€ä¿¡ã®ã‚ューãŒãŸã¾ã£ã¦ã—ã¾ã†ï¼Žãã“ã§è¤‡æ•°ã®æŽ¥ç¶šã‚’利用ã™ã‚‹ã“ã¨ã§ã“れを解消ã™ã‚‹æ–¹æ³•ãŒå–られるãŒï¼Œè¿½åŠ ã®æŽ¥ç¶šã¯ãƒªã‚½ãƒ¼ã‚¹ä½¿ç”¨ã«é–¢ã™ã‚‹ã‚ªãƒ¼ãƒãƒ¼ãƒ˜ãƒƒãƒ‰ã‚’発生ã•ã›ã¦ã—ã¾ã†ï¼Žãªã«ã‚ˆã‚Šå„接続ã«ãŠã‘るレスãƒãƒ³ã‚¹å¾…ã¡æ™‚é–“ã¯ä¾ç„¶ã¨ã—ã¦è§£æ±ºã—ã¦ãŠã‚‰ãšï¼ŒæŽ¥ç¶šã®åˆ©ç”¨é¢ã‹ã‚‰è¦‹ã¦éžåŠ¹çŽ‡ã§ã‚る．ãã“ã§ï¼Œå˜ä¸€ã®æŽ¥ç¶šã«ãŠã„ã¦ï¼Œä»®æƒ³çš„ã«ä¸¦è¡Œé€å—ä¿¡ã‚’è¡Œã†æ–¹æ³•ãŒæ
プライベートã§ã‚³ãƒ¼ãƒ‰ã‚’毎日書ã続ã‘ã¦ï¼’年以上ãŒéŽãŽãŸ
ã„ã¤ã®é–“ã«ã‹ï¼’年間継続ã—ã¦ã‚³ãƒ¼ãƒ‰ã‚’書ã„ã¦ã„ãŸã®ã§ã€ãã®æŒ¯ã‚Šè¿”ã‚Šã§ã™ã€‚上ã®ã‚¤ãƒ³ã‚³ã¯æ—¥ã€…僕を応æ´ã—ã¦ãれる二羽ã®ã‚¤ãƒ³ã‚³ã®ã†ã¡ã®ä¸€ç¾½ã§ã™ã€‚ã“ã®å¾Œæœ¬ã‚’ボãƒãƒœãƒã«å™›ã¿ã¡ãŽã£ã¦ã„ãã¾ã—ãŸã€‚ １年目ã¨ã®é•ã„去年ã“ã‚“ãªãƒã‚¹ãƒˆã‚’書ãã¾ã—ãŸã€‚ ã“ã®ã¨ãã€è‡ªåˆ†ã¯ã‚³ãƒ¼ãƒ‰ã‚’１年継続ã—ã¦æ›¸ã„ãŸã‚ã‘ã§ã™ãŒã€ãã®å¾Œã¾ãŸï¼‘年継続ã—ã¦ã‚³ãƒ¼ãƒ‰ã‚’書ã„ã¦ã„ã¾ã—ãŸã€‚ １年目ã¨ã¯ã€Œæ›¸ããŸã„ã€ã¨æ€ã†ã‚‚ã®ã‚‚変ã‚ã‚Šã¾ã—ãŸã€‚ã¾ãŸã€ç¿’慣をç¶æŒã™ã‚‹åŠ´åŠ›ã‚‚å°ã•ããªã‚Šã€ã‚³ãƒ¼ãƒ‰ã‚’書ãã“ã¨ãã®ã‚‚ã®ä»¥å¤–ã®ã€ç™»å£‡ãªã©ã®æ™‚é–“ã‚’å–れるよã†ã«ãªã‚Šã¾ã—ãŸã€‚ ã“ã®ï¼‘å¹´ã§æ–°ãŸã«ã‚„ã£ãŸã“ã¨ãƒ„ール作æˆmarkdownã‚’Mediumãƒã‚¹ãƒˆã«ã™ã‚‹CLIツールAWS SSMã§ç®¡ç†ã•ã‚ŒãŸãƒ‘ラメーターを環境変数ã«Injectã™ã‚‹ãƒ„ールGoogle Cloud Platform APIå‘ã‘ã«ä½¿ãˆã‚‹ã€goonã¨åŒæ§˜ã®Datastoreクライアント基盤作æˆAWS上ã«Terraform+An
A simple golang web server with basic logging, tracing, health check, graceful shutdown and zero dependencies
main.go �<�8�U �B :�U package main import ( "context" "flag" "fmt" "log" "net/http" "os" "os/signal" "sync/atomic" "time" ) type key int const ( requestIDKey key = 0 ) var ( listenAddr string healthy int32 ) func main() { flag.StringVar(&listenAddr, "listen-addr", ":5000", "server listen address") flag.Parse() logger := log.New(os.Stdout, "http: ", log.LstdFlags) logger.Println("Server is starting
（2018/2/26 追記）Datastore/Go ã®ãƒ‡ãƒ¼ã‚¿è¨è¨ˆã®ã‚³ãƒ„ - pospomeã®ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°æ—¥è¨˜
僕㮠Datastore ã®è¨˜äº‹ã¯ Cloud Datastore/AppEngine Datastore 時代ã®ã‚‚ã®ãªã®ã§ã€ç¾åœ¨ã® Firestore ã® Datastore mode ã ã¨ä¸€éƒ¨ã®å†…容ãŒæ£ã—ããªã„ã¨æ€ã†ã®ã§æ³¨æ„ã—ã¦ãã ã•ã„。(´・ω・`)— pospome (@pospome) March 24, 2021 Datastoreを使ã£ã¦ã„ã¦ã€ ã‚る程度コツã¨ã‹æ³¨æ„点ã¿ãŸã„ãªã‚‚ã®ãŒåˆ†ã‹ã£ã¦ããŸã®ã§ã€ ã¾ã¨ã‚ã¦ã¿ã¾ã—ãŸã€‚ 継続的ã«è¿½è¨˜ã—ã¦ã„ã予定ã§ã™ã€‚ é–“é•ã£ã¦ã„ã‚‹ã¨ã“ã‚ãŒã‚れ㰠コメント or twitter ã§æ•™ãˆã¦ãã ã•ã„。 Datastoreã® entity, kind ãªã©ã®ç”¨èªžã¯ç†è§£ã—ã¦ã„ã‚‹å‰æã§ã™ã€‚ ParentKeyã«æ°—ã‚’ã¤ã‘ã‚‹ Go ã§ã¯ Filter ã«ã‚ˆã‚‹ OR, IN 検索ãŒã§ããªã„ æ–‡å—列ã«å¯¾ã™ã‚‹ LIKE 検索ãŒãªã„ çµå±€ã©ã‚“ãªã‚¯ã‚¨ãƒªãŒç™ºè¡Œã§ãã‚‹ã®ã‹
éžåŒæœŸã¨ãƒŽãƒ³ãƒ–ãƒãƒƒã‚ングã¨ã‚ã¨ä½•ã‹ | κeenã®Happy Hacκing Blog
κeenã§ã™ã€‚最近åŒæœŸ/éžåŒæœŸã€ãƒ–ãƒãƒƒã‚ング/ノンブãƒãƒƒã‚ングã€ç›´æŽ¥å½¢å¼/継続渡ã—å½¢å¼ã‚ãŸã‚ŠãŒæ··ä¹±ã—ã¦ããŸã®ã§å€‹äººçš„ã«æ•´ç†ã—ã¾ã™ã€‚ ã‚ãã¾ã§ç§å€‹äººã®ç†è§£ã‚’çºã‚ãŸã ã‘ãªã®ã§èª¤è¬¬ãªã©ã«æ³¨æ„ã—ã¦ä¸‹ã•ã„。 追記: @tanaka_akrã•ã‚“ã‹ã‚‰æŒ‡æ‘˜ã•ã‚ŒãŸã®ã§ã™ãŒã€ç”¨èªžã®èª¬æ˜ŽãŒé–“é•ã£ã¦ã„ãã†ã ã£ãŸã®ã§æ›¸ãç›´ã—ã¾ã—ãŸã€‚ diffã¯ã“ã¡ã‚‰ éžåŒæœŸã¨ãƒŽãƒ³ãƒ–ãƒãƒƒã‚ングã¯ã‚ˆãæ··åŒã•ã‚Œã¾ã™ã€‚ã¾ãŸã€éžåŒæœŸå‡¦ç†ã®è¨˜è¿°å½¢å¼ã¨ã—ã¦ç›´æŽ¥å½¢å¼ã‚„継続渡ã—å½¢å¼ãªã©ãŒã‚ã‚Šã¾ã™ã€‚ ç§è‡ªèº«é•ã†è¨€è‘‰ã ãªã¨ã¯æ€ã„ã¤ã¤ã‚‚æ··åŒã—ãŸã‚Šé•ã„を忘れãŸã‚Šã—ã¦ã„ã¾ã™ã€‚ éžåŒæœŸã‚‚ノンブãƒãƒƒã‚ングもナイーブãªIOã«æ¯”ã¹ã‚‹ã¨é€Ÿã„æ–¹å¼ã ãªç¨‹åº¦ã®ç†è§£ã§ã„ã¦ãã‚“ãªã«å›°ã‚‰ãªã„ã¨æ€ã£ã¦ã¾ã™ã—æ··åŒã‚„誤用ã«ç›®ãã˜ã‚‰ã‚’ç«‹ã¦ã‚‹ã¤ã‚‚ã‚Šã‚‚ã‚ã‚Šã¾ã›ã‚“。 ã—ã‹ã—ãªãŒã‚‰3者を区別ã—ãªã„ã¨æ„味をæˆã•ãªã„文脈ã§3者を混åŒã—ã¦ã„る技術を何度ã‹è¦‹æŽ›ã‘ãŸã®ã§ï¼ˆè‡ªåˆ†ã®ä¸ã§ï¼‰æ•´ç†ã—よã†ã¨æ€ã£ãŸã®ãŒ
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Atsushi Igarashi on Twitter: "@Linda_pp 紹介ã‚ã‚ŠãŒã¨ã†ã”ã–ã„ã¾ã™ã€‚ãŸã ã€ãã®è«–æ–‡ã§ã¯ Featherweight Java ã‚’é“å…·ã¨ã—ã¦ä½¿ã£ã¦ã¯ã„ã¾ã™ãŒã€ãã®ã‚‚ã®ã‚’å°Žå…¥ã—ãŸã‚‚ã®ã§ã¯ãªãジェãƒãƒªã‚¯ã‚¹ã®è©±ã‚‚出ã¦ãã¾ã›ã‚“ã®ã§ã€ã‚„ã£ã±ã‚Šè‹±èªžåŽŸè‘—論文… https://t.co/CGOyHlni6b"
GitHub - nurdism/neko: A self hosted virtual browser (rabb.it clone) that runs in docker.
GitHub - knsh14/uber-style-guide-ja
GitHub - kyoshidajp/ghkw: Search how many keywords in GitHub Code tool
GitHub - albrow/fo: An experimental language which adds functional programming features to Go.
Chapter I: Go Assembly | Go Internals
Dave Cheneyæ°ã‚’ãŠå‘¼ã³ã—ã¦Mercari Gopher必見ã®Go Trainingを開催 #メルカリãªæ—¥ã€… 2018/04/11 | mercan (メルカン)
ã€Golang】goroutine・channelã®ä¸¦åˆ—処ç†ã§å€‹äººçš„ã«ã‚ˆã使ã†å‡¦ç† - Qiita
GitHub - cznic/99c: github.com/cznic/99c has moved to modernc.org/99c
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