Hi there. I’m Bill “LtRandolph” Clark, and I’m the engineering manager for the Champions team on LoL. I’ve worked on several different teams on League over the past years, but one focus has been consistent: I’m obsessed with tech debt. I want to find it, I want to understand it, and where possible, I want to fix it. When engineers talk about any existing piece of technology - for example League of

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あるサービスがローンチから5年経過し、10万行のソースコード、開発メンバー50名の体制でメンテする、という話をツイッターで見かけました。ソースコードには、神クラスが含まれるとか、含まれないとか。 ソースコードの桁を間違えちゃったのかな、と思うのですが、10万行・100万行の場合について、それぞれ私だったらどういう戦略で修正するか、を考えてみます。この戦略は、自分がメンバークラスでもリーダークラスでも有効です。 前提：恵まれたビジネス このサービスには、50名でメンテする価値があるという事になります。一般論として、5年経過したサービスを50名体制で開発をするとしたら、それは損切りをクリアして50名でペイすると判断をされて開発しているということなので、そのサービスが生み出す売上はそこそこの額であると考えられます。 世の中には開発だけで成立するサービスもあると思いますが、神クラスが出来ているとか

Examining the design of interactive articles by synthesizing theory from disciplines such as education, journalism, and visualization. Computing has changed how people communicate. The transmission of news, messages, and ideas is instant. Anyone’s voice can be heard. In fact, access to digital communication technologies such as the Internet is so fundamental to daily life that their disruption by

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ソフトウェアエンジニアリングの第一人者・和田卓人氏が、効果的な自動テスト戦略について解説しました。ユニットテストの定義の曖昧さから生じる問題点を指摘し、Googleが提唱する「テストサイズ」の概念を紹介。さらに、テストピラミッドの再解釈と最適化について論じ、テストサイズに基づくアプローチがビルドパイプラインの効率化にもたらす利点について解説しました。前回の記事はこちら。 短時間でのテスト実行 和田卓人氏：ということで、じゃあ、次にいきます。短い時間で到達するというアジェンダ、3ポチ目ですね。 「信頼性の高い」、これはテストの結果に嘘がないという話でした。「実行結果」、これは信号として、また問題箇所の絞り込みとしてのテストの実行結果にこだわろうという話でした。そういったテストを、短い時間で到達する、信頼性の高い結果に短い時間で到達する状態を保つ。短い時間で。 ユニットテストの定義の曖昧さ と

A discussion of why I don’t intend to turn Gwern.net into a book, and how trying to write a book can harm writers. As well as asking about doing podcasts, people sometimes ask me whether I am going to write a book or turn Gwern.net into a book. To their surprise, I have no such intention and remain a writer manqué. Writing a book can be harmful; for many writers, the opportunity cost & risk mean t

Programming today is stressful — way more stressful than I remember it in the 90s and early 2000s when I was just starting out. Back then, things would get crazy around deadlines, but at other times, I recall feeling pretty even. These days, however, the pressure seems omnipresent. Naturally, I'm interested in doing away with this feeling of pressure, for the sake of my health as well as my produc

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A few days ago, a video produced by @t3dotgg was posted to his very popular YouTube channel where he reviews an article written by the Graphite team titled “How GitHub replaced SourceForge as the dominant code hosting platform”. Theo’s title was a little more succinct, “Why GitHub Won”. Being a cofounder of GitHub, I found Greg’s article and Theo’s subsequent commentary fun, but figured that it mi

We spent 7 months building a Kubernetes based platform to replace Heroku for our SaaS product at mynewsdesk.com. The results were a 90% reduction in costs and a 30% improvement in performance. We also significantly improved developer experience with reduced deploy times and faster / more accessible tooling. We have now open sourced the entire stack, so you can do the same, but in a few days instea